Jump to content

Nissan RB engine: Difference between revisions

From Wikipedia, the free encyclopedia
Content deleted Content added
No edit summary
Tags: Mobile edit Mobile web edit
 
Line 1: Line 1:
{{More citations needed|date=November 2018}}{{Infobox automobile engine
The '''RB''' engine is a 2.0 L to 3.0 L [[straight-6]] [[piston engine]] from [[Nissan]]. It has an aluminum head and cast iron block, [[SOHC]]/[[DOHC]] two or four-valve per cylinder design with a hemispherical head and belt driven cams. Most turbo models have an intercooled turbo, and recirculating factory blow off valve (with the exception of automatic Laurels and Cefiros) to reduce boost surge when the throttle is closed. All are twin cam except the single cam 2 L '''RB20E''', 2.4L '''RB24s''' and 3L '''RB30E''' engines.
| name = Nissan RB engine
From 1998 the RB25DE/T series was released with a "NEO" head. This enabled the engine to be classed as a LEV (low emission vehicle) engine. With the NEO head, torque and power were further improved although the RB26DETT produced still only 280 [[horsepower|PS]] (206 kW) on paper, according to Nissan factory specs. In reality it produces more than this, but it is underestimated because all main Japanese car manufacturers have a gentlemen's agreement not to produce cars with engines exceeding 206 kW.
| image = RB26DETT R34.jpg
The "RB" name is misconstrued and thought to represent "rhythm & balance", or "race bred". This is not the case, it simply is a "series designator".
| caption = RB26DETT in an [[Nissan Skyline GT-R#R34|R34 Skyline GT-R]]
| manufacturer = [[Nissan]] ([[Nissan Machinery]])
| production = 1985–2004 (original)<br>2019–present (new production)<ref name=2019a>{{cite web|url=https://www.motorauthority.com/news/1122339_nissan-skyline-gt-rs-rb26-engine-back-in-production|title=Nissan Skyline GT-R's RB26 engine back in production|first=Viknesh|last=Vijayenthiran|date=March 29, 2019|publisher=Motor Authority|access-date=April 16, 2019|archive-date=April 21, 2019|archive-url=https://web.archive.org/web/20190421103038/https://www.motorauthority.com/news/1122339_nissan-skyline-gt-rs-rb26-engine-back-in-production|url-status=live}}</ref><ref name=2019b>{{cite web|url=https://www.autoblog.com/2019/03/28/nissan-legendary-rb26-engine-back-in-production/|archive-url=https://web.archive.org/web/20190329094800/https://www.autoblog.com/2019/03/28/nissan-legendary-rb26-engine-back-in-production/|url-status=dead|archive-date=2019-03-29|title=Nissan puts legendary RB26 inline-six engine back into production|first=Chris | last = Chin|date=2019-03-28|publisher=Auto Blog}}</ref>
| configuration = [[Straight-six]]
| displacement = {{convert|1998|cc|L CID|1|abbr=on|order=flip}}<br>{{convert|2428|cc|L CID|1|abbr=on|order=flip}}<br>{{convert|2498|cc|L CID|1|abbr=on|order=flip}}<br>{{convert|2568|cc|L CID|1|abbr=on|order=flip}}<br>{{convert|2770|cc|L CID|1|abbr=on|order=flip}}<br>{{convert|2962|cc|L CID|1|abbr=on|order=flip}}<br>
| bore = {{convert|78|mm|2|abbr=on}}<br>{{convert|86|mm|2|abbr=on}}<br>{{convert|87|mm|2|abbr=on}}
| stroke = {{convert|69.7|mm|2|abbr=on}}<br>{{convert|71.7|mm|2|abbr=on}}<br>{{convert|73.7|mm|abbr=on}}<br>{{convert|77.7|mm|2|abbr=on}}<br>{{convert|85|mm|2|abbr=on}}
| valvetrain = [[SOHC]] 2 valves x cyl.<br>[[DOHC]] [[Multi-valve#Four valves|4 valves x cyl.]] with [[N-VCT|NVCS]]
| turbocharger = Single [[Garrett AiResearch|Garrett]] T3; Twin Garrett T28-type ceramic with [[intercooler]] (RB26DETT)
| coolingsystem = [[Radiator (engine cooling)|Water-cooled]]
| fuelsystem = [[Carburetor]]<br>[[Electronic fuel injection|Electronic Fuel injection]]
| fueltype = [[Petrol engine|Gasoline]]<br>[[Autogas]]<br>[[Liquefied petroleum gas|LPG]]
| management = [[Hitachi]], NICS, ECCS
| predecessor = [[Nissan L engine]]
| successor = [[Nissan VQ engine]]<br>[[Nissan VR engine]]
| block = [[Cast iron]]
| head = [[Aluminium]]
| compression = 7.8:1-10:1
| power = {{Convert|94-278|PS|hp kW|0|abbr=on|lk=on}}
| torque = {{convert|142-353|Nm|kg.m lbft|0|abbr=on|lk=on}}
}}
The '''RB''' engine is an [[oversquare]] 2.0&ndash;3.0&nbsp;L [[straight-6]] [[Four-stroke cycle|four-stroke]] [[Petrol engine|gasoline engine]] from [[Nissan]], originally produced from 1985 to 2004. The RB followed the 1983 [[Nissan VG engine|VG-series]] [[V6 engine]]s to offer a full, modern range in both straight or V layouts.<ref name=DF87>{{citation | title = Data File 1987 | publisher = Nissan Motor Co., Ltd. | page = 11 | location = Tokyo, Japan | date = April 1987 }}</ref> It was part of a new engine family name PLASMA (Powerful & Economic, Lightweight, Accurate, Silent, Mighty, Advanced).


The '''RB''' engine family includes single overhead camshaft (SOHC) and double overhead camshaft (DOHC) engines.<ref>{{Cite web |last1=Ishida |first1=Y. |last2=Ito |first2=K. |last3=Kita |first3=Y. |last4=Kadowaki |first4=S. |date=1986-01-01 |title=Nissan's new in-line DOHC six cylinder engine and its development |osti=5702884 |url=https://www.osti.gov/biblio/5702884 |language=English}}</ref> Both [[SOHC]] and [[DOHC]] versions have an aluminium head. The SOHC versions have 2 valves per cylinder and the DOHC versions have 4 valves per cylinder; each cam lobe moves only one valve. All RB engines have [[belt drive]]n cams and a cast iron block. Most turbo models have an [[intercooled]] turbo (the exceptions being the single cam RB20ET & RB30ET engines), and most have a recirculating factory [[Blowoff valve|blow off valve]] (the exceptions being when fitted to [[Nissan Laurel|Laurels]] and [[Nissan Cefiro|Cefiros]]) to reduce compressor surge when the throttle quickly closes.
==RB20==


The RB engines are derived from the six-cylinder [[Nissan L engine#L20A|L20A]] engine, which has the same bore and stroke as the RB20. All RB engines were made in [[Yokohama|Yokohama, Japan]] where the [[VR38DETT]] engine was made. Some RB engines were rebuilt by Nissan's [[Nismo|NISMO]] division at the Omori Factory in Tokyo as well. All Z-Tune [[Nissan Skyline|Skylines]] were rebuilt at the Omori Factory.
[[Image:R31 rb20e.jpg|right|thumb|250px|R31 RB20E engine in an R31 [[Nissan Skyline]]]]


After a 15-year hiatus, production of the RB series resumed in 2019.<ref>{{cite news|url=https://news.yahoo.com/nissan-apos-iconic-rb26-engine-130747708.html|title=Nissan's Iconic RB26 Engine Returns To Production|first=Tyler|last=Heatley|date=2019-04-02|publisher=Yahoo News|access-date=2019-12-24|archive-date=2019-12-24|archive-url=https://web.archive.org/web/20191224123643/https://news.yahoo.com/nissan-apos-iconic-rb26-engine-130747708.html|url-status=dead}}</ref><ref>{{cite web|url=https://www.roadandtrack.com/car-culture/buying-maintenance/a26985019/nissan-syline-gt-r-rb26-engine-restarts-production/|title=The Nissan Skyline GT-R's RB26 Inline-Six Is Going Back Into Production|first=Brian|last=Silvestro|date=2019-03-29|publisher=Road & Track|access-date=2020-01-19|archive-date=2020-07-08|archive-url=https://web.archive.org/web/20200708061735/https://www.roadandtrack.com/car-culture/buying-maintenance/a26985019/nissan-syline-gt-r-rb26-engine-restarts-production/|url-status=live}}</ref><ref>{{cite web|url=https://www.hagerty.com/articles-videos/articles/2019/03/28/nissan-restarting-production-skyline-rb26-straight-six|title=Nissan is restarting production of the Skyline's RB26 straight-six|first=Eric|last=Weiner|date=2019-03-28|publisher=Hagerty|access-date=2020-01-19|archive-date=2020-12-14|archive-url=https://web.archive.org/web/20201214104716/https://www.hagerty.com/media/news/nissan-restarting-production-skyline-rb26-straight-six/|url-status=live}}</ref>
There were three 2.0&nbsp;L '''RB20''' engines produced:
* '''RB20E''' - single-cam
* '''RB20DE''' - twin-cam
* '''RB20DET''' - twin-cam turbo


==Bore and stroke==
The first series RB20E/DE/DET engine was fitted to the [[Nissan Skyline|R31 Skyline]] and is generaly refered to as a "red top" RB engine as it has red cam covers, it used the "NICS" (nissan induction control system) injection system. The non-turbo models were also fitted to various Holdens in Australia and New Zealand, and some early Z31(300zx).
All Nissan engines follow a naming convention, identifying the engine family (in this case, '''RB'''), displacement, features present—see the [[list of Nissan engines]] for details.


The stock dimensions for the Nissan RB Engine:
[[Nissan Laurel|Laurels]], [[Nissan Skyline|R32 Skyline]] and [[Nissan Cefiro|Cefiros]] used the second (1988-1993) series RB20E/DE/DET .This series RB engine has an improved head desighn over the previous version and used the new "ECCS" (electronically concerntrated control system) injection system.
* '''RB20''' - {{convert|1998|cc|L|1|abbr=on|order=flip}}, bore x stroke: {{convert|78x69.7|mm|abbr=on}}
* '''RB24''' - {{convert|2428|cc|L|1|abbr=on|order=flip}}, bore x stroke: {{convert|86x69.7|mm|abbr=on}}
* '''RB25''' - {{convert|2498|cc|L|1|abbr=on|order=flip}}, bore x stroke: {{convert|86x71.7|mm|abbr=on}}
* '''RB26''' - {{convert|2568|cc|L|1|abbr=on|order=flip}}, bore x stroke: {{convert|86x73.7|mm|abbr=on}}
* '''RB30''' - {{convert|2962|cc|L|1|abbr=on|order=flip}}, bore x stroke: {{convert|86x85|mm|2|abbr=on}}
* '''"D"''' indicates a dual overhead cam as opposed to a single overhead cam
* '''"E"''' indicates the individual engine ports are [[Electronic fuel-injection|electronically fuel-injected]] 'single-cam'
* '''"S"''' indicates the engine is carbureted
* '''"T"''' indicates the engine has a factory installed turbocharger
* '''"TT"''' indicates the engine has factory installed twin turbochargers
* '''"P"''' indicates the engine runs on LPG ([[liquefied petroleum gas]])


=={{anchor|RB20|RB20E|RB20ET|RB20DE|RB20DET}} RB20 (2.0L I6)==
[[Nissan Skyline|R34 Skylines]] and Nissan Stageas used the RB20DE and RB20e (Stagea only) engine with a NEO head. The Neo Rb20de is the most economical Rb engine so far produced, it is classed ans LEV (low emission vehicle) engine.
<!-- This is a Japanese single cam two litre RB20ET, not an Australian RB30ET, please do not change the photo description -->
[[File:Passage Wagon RB20ET.jpg|right|thumb|RB20ET engine in an R31 Passage Wagon]]
[[File:1990 Nissan RB20DET engine in HNR32 Skyline GTS-4.jpg|right|thumb|RB20DET engine in Skyline GTS-4 (HNR32)]]


The first '''RB20ET/DE/DET''' engines were fitted to the [[Nissan Skyline|HR31 Skyline]] and the [[Nissan 300ZX#Z31|Nissan Fairlady 200ZR]] (Z31 chassis), produced from August 1985. The early twin cam engines featured the '''NICS''' (Nissan Induction Control System) injection system, while the later twin cam engines used '''ECCS''' (Electronic Concentrated Control System).<ref>{{Cite web |title=AutoSpeed - The Late-Model Nissan RB Guide |url=https://www.autospeed.com/cms/a_2740/article.html |access-date=2022-11-06 |website=www.autospeed.com}}</ref> Later versions which used '''ECCS''' engine management, discarded the twelve tiny runners for six much larger ones (though they retained twelve ports on the head, so there was a splitter plate). It was also fitted to the A31 Cefiro, C32 and C33 Laurel. The Fairlady 200ZR was fitted with an intercooled NICS type RB20DET.
==RB24==


The first RB20E engine was used in the [[Nissan Laurel#Fifth generation (C32) (1984–1989)|C32 Nissan Laurel]], produced from October 1984.
There was only one version of the '''RB24''' engine produced:
* '''RB24s''' - single-cam


[[Nissan Laurel|Laurels]], [[Nissan Skyline|R32 Skyline]] and [[Nissan Cefiro|Cefiros]] used the second (1989–1993) series RB20E/DE/DET. This had an improved head design, and used the '''ECCS''' injection system. These later motors are known as "Silver Top" engines.
This is a relatively unknown engine, as it was not produced for the Japanese domestic market. These were fitted to some left hand drive Nissan Cefiros exported from Japan new. Mechanically it is made from an '''RB30e''' head, '''RB25de/det''' block and '''RB20de/det''' crank with 34 mm heigh pistons. This engine used carberators instead of the Nissan ECCS fuel injection system. This has the outcome of it being able to rev harder than the '''RB25de/det''' (as it has the same stroke as the '''RB20de/det''') as well as being almost the same displacment as the '''RB25de/det'''. A common modification is to fit a twin cam head from other RB series motors while retaining the carberated set-up. In standard single cam form it produced 141 [[horsepower|PS]] @ 5000 [[rpm]] and 20.1 [[kilogram-force|kgf]]·[[metre|m]] of [[torque]] @ 4,400 rpm


The RB20DET-R was used in the [[Nissan Skyline#GTS-R|Nissan Skyline 2000GTS-R]] (HR31) and was limited to 800 units.
==RB25==


There were a variety of 2.0 L '''RB20''' engines produced:
[[Image:R33 motor (RB25DET).jpg|right|thumb|250px|1993 RB25DET with VCT]]
*'''RB20E'''
*:single-cam
*:Power: {{convert|95|to|110|kW|hp PS|0|abbr=on}} at 5600&nbsp;rpm
*:Torque: {{convert|167|to|181|Nm|lbft kgm|abbr=on}} at 4000–4400&nbsp;rpm
*:Camshaft duration: 232° intake; 240° exhaust
*:Camshaft lift: 7.3&nbsp;mm intake, 7.8&nbsp;mm exhaust
*'''RB20ET'''
*:single-cam, turbocharged
*:Power: {{convert|125|kW|hp PS|0|abbr=on}} at 6000&nbsp;rpm
*:Torque: {{convert|206|Nm|lbft kgm|abbr=on}} at 3200&nbsp;rpm
*'''RB20DE'''
*:twin-cam
*:Power: {{convert|110|to|114|kW|hp PS|0|abbr=on}} at 6400&nbsp;rpm
*:Torque: {{convert|181|to|186|Nm|lbft kgm|abbr=on}} at 5600&nbsp;rpm
*:Camshaft duration: 232° intake, 240° exhaust
*:Camshaft lift: {{convert|7.3|mm|abbr=on}} intake, {{convert|7.8|mm|abbr=on}} exhaust
*'''RB20DET'''
*:twin-cam, turbocharged
*:Power: {{convert|158|kW|hp PS|0|abbr=on}} at 6400&nbsp;rpm
*:Torque: {{convert|264|Nm|lbft kgm|abbr=on}} at 3200&nbsp;rpm
*:Camshaft duration: 240° intake, 240° exhaust; 248° intake, 240° exhaust ("Red Top")
*:Camshaft lift: {{convert|7.3|mm|abbr=on}} intake, {{convert|7.8|mm|abbr=on}} exhaust; {{convert|7.8|mm|abbr=on}} intake, {{convert|7.8|mm|abbr=on}} exhaust ("Red Top")
*'''RB20P'''
*:single-cam, 12 valves, [[autogas]] [[Liquefied petroleum gas|LPG]]
*:Power: {{convert|94|PS|kW hp|0|abbr=on}} at 5600&nbsp;rpm
*:Torque: {{convert|142|Nm|lbft kgm|abbr=on}} at 2400&nbsp;rpm
*'''RB20DET-R'''
*:twin-cam, turbocharged
*:Power: {{convert|210|PS|kW hp|0|abbr=on}} at 6400&nbsp;rpm
*:Torque: {{convert|245|Nm|lbft kgm|abbr=on}} at 4800&nbsp;rpm
*'''RB20DE NEO'''
*:twin-cam
*:Power: {{convert|155|PS|kW hp|0|abbr=on}}
*:Torque: {{convert|186|Nm|lbft kgm|abbr=on}}


==RB24S (2.4L I6)==
The 2.5&nbsp;L '''RB25''' engine was produced in two forms:
[[File:Nissan-RB24S-engine.JPG|thumb|Nissan RB24S engine, Carburetor, SOHC, used in the Latin American market Laurel Altima A31 (an export market name for the A31 Cefiro)]]
* '''RB25DE''' - twin-cam
This is a comparatively rare engine, as it was not produced for the Japanese domestic market. These were fitted to some left hand drive Nissan Cefiros exported from Japan new. Mechanically, the RB24S combines an '''RB30E''' head, '''RB25DE/DET''' block and '''RB20DE/DET''' crank with 34&nbsp;mm height pistons. The resulting {{convert|86x69.7|mm|2|abbr=on}} bore and stroke combined to form a {{convert|2428|cc|L|1|abbr=on|disp=flip}} inline-six engine.
* '''RB25DET''' - twin-cam turbo


This engine used carburetors instead of the Nissan ECCS fuel injection system. It is able to rev higher than the '''RB25DE/DET''' (as it has the same stroke as the '''RB20DE/DET''') as well as being almost the same displacement as the '''RB25DE/DET'''. A common modification is to fit a twin cam head from other RB series motors while retaining the carburetor set-up. The standard single cam form produced {{convert|141|PS|hp kW|0|abbr=on}} at 5,000&nbsp;rpm and {{convert|20.1|kgm|lbft Nm|0|abbr=on}} of [[torque]] at 3,000&nbsp;rpm.
RB25DE and DET engines produced from August 1993 also featured [[variable cam timing]] (VCT) for the [[intake manifold|intake]] cam. This gave the new RB25DE more power and torque at lower rpm than the previous model.


{{Clear}}
In May 1998 a NEO head was fitted. This was also a low emission vehicle engine (LEV). The non-VCT and non-turbo was fitted to the R32 Skyline, the VCT turbo and non-turbo was fitted to R33 Skylines and Stageas. R34 Skylines also use these engines, but they are fitted with a NEO head.


==RB25 (2.5L I6)==
<br clear=all>
[[File:RB25DET R33.jpg|right|thumb|1993 RB25DET with VCT ([[N-VCT|NVCS]])]]
[[File:NEO RB25DET R34.jpg|right|thumb|1998 NEO RB25DET]]
[[File:R33 RB25DET with Jatco Transmission.jpg|thumb|RB25DET and Transmission pulled from an R33 Skyline GTST]]


The RB25 series of engines was first introduced in the R32 Nissan Skyline GTS25 sedan and coupe models.<ref>{{cite web|title=Skyline Encyclopedia|url=http://www.southernskylines.com/encyclopedia/r32/GTS-25.html|publisher=Southern Skylines|access-date=2016-12-21|archive-date=2017-04-09|archive-url=https://web.archive.org/web/20170409080306/http://www.southernskylines.com/encyclopedia/r32/GTS-25.html|url-status=live}}</ref><ref>{{Cite web|url=http://gtr-registry.com/en-ecr32-vin-table.php|title = Nissan Skyline ECR32 VIN Table}}</ref> RB25DE (Naturally Aspirated) and DET (Turbocharged) engines produced from August 1993 also featured [[N-VCT|NVCS]] (Nissan Variable Cam System) for the [[intake manifold|intake]] cam. This gave the new RB25DE more power and torque at lower rpm than the previous model. From 1995,(Series 2 Engines) both the RB25DE and RB25DET had a revised electrical system and the turbocharger on the RB25DET(S2) had a ceramic turbine
wheel rather than aluminium. The most obvious change to the system was the introduction of [[ignition coil]]s with built in ignitors, therefore the coil ignitor that was on previous models was not used. Other changes were, different air flow meter, engine [[Engine control unit|ECU]], cam angle sensor and throttle position sensor. Mechanically Series 1 and Series 2 are very similar, the only mechanical difference would be the [[camshaft]]s as the Series 2 Cam Angle Sensor's shaft that goes into the exhaust cam is slightly different. Early Series 2 featured the traditional [[Mitsubishi Motors|Mitsubishi]] CAS which was later swapped for the Black Hitachi CAS which used a grooved shaft because of a half circle positioning tooth which occasionally broke off when removing CAS.


In May 1998 a [[Nissan VVL engine|NEO]] head was fitted, which enabled the engine to be classified as a low emission vehicle ([[Low Emission Vehicle|LEV]]) engine due to their lower [[Fuel consumption in automobiles|fuel consumption]] and emission output. The [[Nissan VVT engine|NEO]] head featured solid lifters(need to be adjusted overtime) rather than hydraulic(self adjusting), revised camshafts (higher lift lower duration to complement smaller ports and torque), with on/off [[solenoid]] Variable VCT, used a hotter {{convert|82|°C|abbr=on}} thermostat, model-specific coil packs and a revised inlet manifold (the runner diameter is reduced from {{convert|50|to|45|mm|abbr=on}} to increase air velocity and low end torque) in particular the RB25DE [[Nissan VVT engine|NEO]] which had two inlets going into the inlet manifold. The [[combustion chamber]] of the head is smaller so model-specific pistons are used to compensate. The turbo received the larger OP6 turbine wheel, while some came with an aluminium compressor and super alloy turbine wheels, others had the nylon plastic compressor wheel and ceramic turbine wheel. Turbo engines were upgraded to use GT-R spec [[connecting rod]]s. Some also used an N1 type oil pump and had the oil pump drive collar on the crank revised to help cope with the breakage problems associated with fast, high revs.
All in all they are quite a different engine in their own right - a culmination of 20 years of Nissan RB engine building rolled into one.


The non-VCT, non-turbo RB25DE was fitted to the R32 Skyline, the VCT turbo and non-turbo was fitted to R33 Skylines and the [[Nissan Stagea|WNC34 Stagea]] and the [[Nissan Laurel#C34|Laurel C34]]. R34 Skyline, C35 Laurel and later Stagea (WGNC34) models use the [[Nissan VVL engine|NEO]] RB.
==RB26DETT==


The 2.5 L '''RB25''' engine was produced in four different forms:
<!-- Unsourced image removed: [[Image:RB26DETT.jpg|thumb|250px|Twin-[[turbo]] [[straight-6]] [[DOHC]] motor from an R32 [[Nissan Skyline GT-R]]]] -->


*'''RB25DE'''
The first 2.6&nbsp;L '''RB26DETT''' featured twin [[turbocharger]]s and produced 280&nbsp;PS (206&nbsp;kW) @ 6800 rpm and 260&nbsp;ft·lbf (353&nbsp;N·m) @ 4400 rpm. The last series of the RB26DETT (with NEO head) produced 280&nbsp;PS (206&nbsp;kW) @ 6800 rpm and 289&nbsp;ft·lbf (392&nbsp;N·m) @ 4400 rpm. It is renowned for its strength and through extensive modification, some examples have been known to produce over 1000&nbsp;hp (735&nbsp;kW) and with regular maintenance, many of these engines have been driven way past the 100,000 mile mark with a few heading toward 200,000 miles. The engine block is strong to 1360&nbsp;hp (1000 &nbsp;kw)
*:twin-cam, non-turbo with 10:1 compression ratio
*:Power: {{convert|180-200|hp|kW PS|0|abbr=on}} at 6000&nbsp;rpm
*:Torque: {{convert|255|Nm|lbft kgm|abbr=on}} at 4000&nbsp;rpm
*'''RB25DET'''
*:twin-cam, turbocharged (T3 Turbo) with 9:1 compression ratio
*:Power: {{convert|245-250|hp|kW PS|0|abbr=on}}
*:Torque: {{convert|319|Nm|lbft kgm|abbr=on}}
*'''RB25DE NEO'''
*:twin-cam, non-turbo with 10:1 compression ratio
*:Power: {{convert|197|hp|kW PS|0|abbr=on}} at 6000&nbsp;rpm
*:Torque: {{convert|255|Nm|lbft kgm|abbr=on}} at 4000&nbsp;rpm
*'''RB25DET NEO'''
*:twin-cam, turbocharged (T3 Turbo, "45V3" with OP-6 Compressor) with 9:1 compression ratio
*:Power: {{convert|276|hp|kW PS|0|abbr=on}} at 6400&nbsp;rpm
*:Torque: {{convert|362|Nm|lbft kgm|abbr=on}} at 3200&nbsp;rpm)


==RB26 (2.6L I6)==
It was used in the following cars:
===RB26DE===
* [[Nissan Skyline GT-R]] R32
The RB26DE is a naturally aspirated variant of the RB26DETT made specifically for the 1992 [[Nissan Skyline#Eighth generation (R32; 1989)|Nissan Skyline Autech Version GTS-4 (HNR32)]] sedan.<ref>{{cite web |url=https://www.autech.co.jp/history/sv/skyline_autechversion_1992.html |website=www.autech.co.jp |title=1992 Nissan Skyline Autech Version |access-date=20 November 2021}}</ref><ref>{{cite web |url=https://gtr-registry.com/en-r32-skyline26-autech.php |website=gtr-registry.com |title=1992 Nissan Skyline 26 Autech Version |access-date=20 November 2021}}</ref><ref>{{cite web|url=http://gtr-registry.com/en-r32-skyline26-autech.php|title=Nissan Skyline R32 Autech Version|website=gtr-registry.com}}</ref> Mechanically, it is similar to the RB26DETT as it uses the same cylinder head, bore and stroke ({{convert|86x73.7|mm|2|abbr=on}}) and individual intakes as the RB26DETT, minus the usage of a parallel [[twin-turbo]] system. The engine and ECU ([[engine control unit]]) were tuned by [[Autech]] and S&S Engineering to make {{convert|220|PS|kW hp|0|abbr=on}} at 6,800rpm and {{convert|245|Nm|lbft kgm|abbr=on}} at 5,200rpm. It also has a higher compression ratio than the RB26DETT, at 10.5:1.
* [[Nissan Skyline GT-R]] R33
* [[Nissan Skyline GT-R]] R34 with NEO head.
* [[Nissan Stagea 260RS]] with neo head
* [[Tommy Kaira ZZII]]


===RB26DETT===
<br clear=all>
{{multiple image
| align = right
| direction = vertical
| width = 220
| image1 = Nissan RB26DETT Engine - Front.jpg
| image2 = Nissan RB26DETT Engine - Front Side.jpg
| image3 = Nissan RB26DETT Engine - Rear Side.jpg
| footer = This Nissan RB26DETT engine is on display at the Nissan Engine Museum in Yokohama, Japan.
}}
The RB26DETT engine is a {{convert|2568|cc|L|1|abbr=on|order=flip}} [[twin-turbo]] [[inline-six engine]] manufactured by Nissan, for use in the 1989-2002 [[Nissan Skyline GT-R]]. The RB26DETT engine block is made from cast iron, while the cylinder head is made from aluminium alloy, which contains [[Overhead camshaft#Dual overhead camshaft|DOHC]] [[Multi-valve#Four-valve cylinder head|4 valves]] per cylinder (24 valves in total) setup. The intake of the RB26DETT varies from other RB-series motors in that it has six individual (3 sets of 2 throttle assemblies that are siamesed together) instead of a single [[throttle body]]. The engine also uses a parallel [[twin-turbo]] system, using a pair of T25-type ceramic turbochargers set by the [[wastegate]]s to limit boost pressure to {{cvt|10|psi|bar|abbr=on}}, although the Skyline GT-R has a built in boost restrictor to keep boost under {{cvt|14|psi|bar|abbr=on}}.


The first 2.6 L RB26DETT was rated by Nissan at around {{convert|276|bhp|PS kW|0|abbr=on}} at 6,800 rpm and {{convert|36|kgm|0|abbr=on|order=flip}} at 4,400 rpm. By the end of production, power levels had gone up to around {{convert|320|PS|kW HP|0|abbr=on}} at 6,800 rpm and {{convert|40|kgm|0|abbr=on|order=flip}} at 4,400 rpm,<ref>{{cite web |url=https://www.carfolio.com/specifications/models/car/?car=11627 |website=carfolio.com |title=1990 Nissan Skyline GT-R R32 |date=28 February 2013 |access-date=24 July 2018 |archive-date=25 July 2018 |archive-url=https://web.archive.org/web/20180725063600/https://www.carfolio.com/specifications/models/car/?car=11627 |url-status=live }}</ref><ref>{{cite web |url=http://www.automobile-catalog.com/car/1990/2135570/nissan_skyline_gt-r_nismo.html |website=automobile-catalog.com |title=1990 Nissan Skyline GT-R R32 Nismo |access-date=24 July 2018}}</ref><ref>{{cite web |url=https://www.supercars.net/blog/1989-nissan-skyline-gt-r/ |website=supercars.net |title=1989 Nissan Skyline GT-R |editor-first1=Nick D. |editor-last1=Owen |editor-first2=Richard |editor-last2=Owen |date=2 February 2016 |access-date=24 July 2018 |archive-date=14 December 2020 |archive-url=https://web.archive.org/web/20201214104715/https://www.supercars.net/blog/1989-nissan-skyline-gt-r/ |url-status=live }}</ref> not only because of developments and modifications to the engine, but also because of the "[[Gentlemen's Agreement]]" made between automakers at the time to limit the "advertised" horsepower of any vehicle to {{cvt|280|PS|bhp kW|0|abbr=on}}. While the published figures from Nissan were as quoted above, it has been known among enthusiasts that the car actually had a factory power output closer to the {{convert|320|PS|kW hp|0|abbr=on}} figure.<ref>{{Cite web|url=http://www.rbmotoring.com/blog/does-the-stock-r32-gtr-really-only-make-276-horsepower|title=Does the stock R32 GTR really only make 276 horsepower?|website=RB MOTORING - JDM importer|access-date=2019-02-25|archive-date=2019-03-27|archive-url=https://web.archive.org/web/20190327091736/http://www.rbmotoring.com/blog/does-the-stock-r32-gtr-really-only-make-276-horsepower|url-status=live}}</ref> The RB26 is widely known and became quite popular for its strength and power potential thanks to its iron block and forged internals, making it a modification friendly platform for tuners and aftermarket modifications in general.<ref name="thtp">{{cite book |title= Turbo and High-tech Performance #186 |date=July 2006 }}</ref><ref name="exvitermini1">{{cite web | access-date=2006-08-24 | url=http://www.exvitermini.com/r33specs.htm | title=Ex Vi Termini: GTR-700 specifications | url-status=dead | archive-url=https://web.archive.org/web/20061113165759/http://www.exvitermini.com/r33specs.htm | archive-date=2006-11-13 }}</ref>
==RB26DETT Z2==
The motor used in the Nissan Skyline Z-Tune is a 2.8 L. Although the 26 stands for 2.6 L, there was never a Nissan engine called The RB28. It is basically the RB26 motor, modified with Nismo parts, and stroked to 2.8 L. The end result was the RB26 Z2, which puts out 530 [[horsepower|hp]] (390 kW) and 550 N·m of torque.


{| class="wikitable"
==RB30==
|- style="text-align: center"
|
| colspan="2" | Duration
| colspan="2" | Lift
|- style="text-align: center"
| Camshaft || Intake || Exhaust || Intake || Exhaust
|-
| RB26DETT (05U) || 240° || 236° || {{convert|8.58|mm|abbr=on}} || {{convert|8.28|mm|abbr=on}}
|-
| RB26DETT N1 (24U) || 240° || 236° || {{convert|8.58|mm|abbr=on}} || {{convert|8.28|mm|abbr=on}}
|}
Some factory features of the RB26DETT:
* 6 throttle body intake
* Solid lifter valve actuation, shim under bucket
* Belt driven cams
* CAS (crank angle sensor) driven off exhaust cam, tells ECU ([[engine control unit]]) crank/cam position
* water cooled, oil pressure lubed turbos
* OEM cast pistons have cooling channels under the crowns (extra oil cooling to keep piston temperatures down)
* Piston oil squirters
* Sodium filled exhaust valves
* 8 Counter weighted [[crankshaft]]
* 'I' beam connecting rods


There is a common oiling problem with the pre-1992 R32 RB26 motors, as the surface where the crankshaft meets the oil pump was machined too small, eventually leading to oil pump failure at high rpm. This issue was resolved in later versions of the RB26 with a wider oil pump drive, which is found in all R33+ RB26 motors. Aftermarket performance parts makers also make oil pump extension drive collars to rectify this problem. More recently a spline drive solution has been developed by an aftermarket tuner Supertec Racing who moves away from the OEM flat drive system and uses splines to drive the oil pump gears in the same way as the [[Toyota JZ engine#1JZ-GTE|Toyota's 1JZ-GTE]] engine found in the [[Toyota Supra#A70|Toyota Supra (MK3)]]. This kit is available for most uprated RB26 oil pumps including Nissan's own OEM, N1 and Nismo parts, although most high HP RB-series engines all over the world have been proven to be reliable without spline driven oil pumps when built and tuned correctly.
The motor is a cast iron block with a alloy head, and a [[SOHC]] at 86x86. Three models of 3.0&nbsp;L '''RB30''' were produced, the carburetted RB30S, the non-turbo RB30E and the turbo RB30ET. This motor was produced because the Holden 202 (3.3l) powering the Holden Commodore could no longer satisfied emissions requirements, and with all new cars required to run on unleaded petrol by 1986, a quick replacement was needed. Nissan Motor co. teamed up with GM to build their biggest displacement RB, the 3-litre RB30.
The carburetted RB30S was fitted to Nissan Patrols and develops 100 kW and 223 Nm of torque. The RB30E was fitted to the Australian and South African Nissan R31 [[Skyline]] and the Holden VL Commodore (Australia). This engine had four different outputs ranging from 114 kw to 140 kw depending on the model it was fitted to. The Turbo version was fitted to the [[Holden Commodore|VL Commodore]], and produced around 150 kW.


Besides minor cosmetic updates and ECU fine tunings, changes were made in the R34 generation to [[ball bearing]] T28 turbochargers as opposed to journal bearing turbos. The R34 GT-R turbos retained the ceramic exhaust turbine wheel. Models that had steel exhaust turbine wheels included the R32 Nismo, R32-R33-R34 N1 models and R34 Nür spec skyline GT-R's.


R34 GT-R model RB26DETT engine specific differences to the R32-R33 engines include:
==RB30DE==
* Candy red cam/coil pack covers
* Different coil cover emblem
* Plastic CAM gear cover
* Non-painted inlet plenum (apparently also a lighter casting)
* [[Hitachi]] CAS (Crank angle sensor) has different drive fitting compared to earlier R32-R33 exhaust cams
* Igniter built into coil packs (no igniter pack on the rear of coil cover)
* Ball bearing turbochargers with ceramic exhaust turbine wheels
* Stainless steel dump pipes
* Sump front differential has a different ratio (3:55)
* Different diameter coolant/heater pipes on intake side of block
* Dual mass [[flywheel]]


Originally, the R32 GT-R was planned to have the 2.4 L RB24DETT and compete in the 4000 cc class (in [[Group A]] rules, the displacement is multiplied by 1.7 if the engine is turbocharged). This was at a time when [[Nismo]] was going through the process of designing the R32 GT-R to be a [[Group A]] race car. However, when the engineers added the AWD system, they found that it made the car heavier than expected and as a result, much less competitive. [[Nismo]] made the decision to make the engine a 2.6 L twin-turbo and compete in the higher 4500 cc class, resulting in the RB26DETT engine many known today.{{citation needed|date=January 2024}}
These rare engines were used in the Tommy Kaira M30 based on the R31 Skyline GTS-R. It delivered 177 kw @ 7000rpm and 294 Nm @ 4800rpm. Apparently the engine was made up of a RB30 bottom end mated to a modified RB20DE head. These engines also exists as a hybrid conversion using a RB30 bottom end and a RB25DE head.


[[file:Nissan Skyline GT-R R34 V Spec II.jpg|thumb|The Nissan Skyline GT-R V-spec II (BNR34) is powered by the RB26DETT.]]
==RB30DET==


The RB26DETT was used in the following vehicles:
No official version exists but it is referred to by tuners as the engine can be bored to 3 liters. Also refers to a turbocharged engine featuring an RB30E block with a twin-cam head conversion. Common hybrid in Australia using a RB30E bottom end mated to a RB25DE cylinder head and turbo. The RB25DE cylinder head from the R32 Skyline, A31 Cefiro or C33 Laurel can be used. The RB25DET (from the R33 Skyline or C34 Laurel or Stagea) head is usually not used, as the oil and water galleries do not match up with the RB30 block, and the variable cam timing on the RB25DET further compicates things. As it has a heavier block (relative to the RB26DETT), horsepower has been brought up to 1600HP (compared to 1400HP) at limits of block.
* [[Nissan Skyline GT-R]] BNR32
There is also an "RB30DETT" kit manufactured by OS Giken of Japan, which simply replaces the stock engine block with a pre-fabricated one, measuring 86mm bore x 86mm stroke and featuring reinforced internals.
* Nissan Skyline GT-R BCNR33
* [[Nissan Skyline GT-R|Nissan Skyline GT-R Autech Version 40th Anniversary ]] BCNR33 (Autech factory-installed RB26DETT and AWD 5spd transmission in R33 sedan chassis)<ref>{{cite web |url=https://gtr-registry.com/en-r33-autech-gtr.php |website=gtr-registry.com |title=Nissan Skyline Autech Version 40th Anniversary |access-date=21 November 2021}}</ref>
* Nissan Skyline GT-R BNR34
*[[Nissan Stagea#260RS Autech edition|Nissan Stagea 260RS]] WGNC34改 (RS4 Chassis used)
* [[Tommykaira ZZII]] (concept car)


{{clear}}
==RB-X GT2==


===RB26DETT N1===
The '''RB-X GT2''' (also called '''REINIK''') is an engine specially made for the [[Nissan Skyline GT-R|Nismo 400R]]. The difference between this engine and a RB26 DETT is the engine is bored to 2771 cm&sup3; which gives out 450 PS (331 kW) at 6,800 rpm and 47.8 [[kgf]]·m (469 N·m or 347 lbf·ft) at 4,400 rpm. This engine comes with a reinforced cylinder block, cylinder head, 87 metal head gasket t=1.2, piston with cooling channel, forged crank shaft, forged connecting rods, N1 turbine with reinforcement actuator, high flow air cleaner, stainless down pipe amd low air resistance sport catalizer, most of which is not offered on the RB26DETT.
The RB26DETT N1 is a modified version of the RB26DETT engine, developed by Nismo (Nissan Motorsports) for Group A and Group N motorsport. Nismo found that the standard RB26DETT engine required too much maintenance for use in a Group-A or Group-N race car and subsequently designed the N1 block; this was first used in Bathurst, Australia. Nismo balanced the crankshaft to a higher specification than stock, as the standard RB26DETT engine experiences vibrations between 7,000 and 8,000&nbsp;rpm. The engine also received improved water and oil channels within the engine block. The pistons and top piston rings were also upgraded to {{convert|1.2|mm|abbr=on}}. The N1 engine also has upgraded camshafts and upgraded turbochargers.


Although all versions of the RB26DETT N1 engine use [[Garrett AiResearch|Garrett]] T25 turbochargers, the specification of the turbochargers changed through the 3 generations of the RB26DETT N1 engine (R32, R33, and R34). The R32, and R33 versions used [[Journal bearing|Journal Bearing]] T25 Turbochargers. The R34 RB26DETT N1 engine used Garrett GT25 turbo chargers (which use a set of ball bearings).
==RD28==


The biggest difference between the turbochargers used in the N1 engine, and the standard RB26DETT engine, is that the turbine wheels in the turbocharger are made from steel, rather than the [[ceramic]] used for the standard RB26DETT turbochargers. The ceramic turbine wheels are found to be very unreliable when used at high rotational speeds inducing higher centrifugal forces (such as when the turbochargers are used at a higher boost pressure than stock). With the advances in manufacturing technology such as sealing and material processes.
This is a 2.8L diesel engine that is fitted to some Nissan Laurels. The Nissan RD engine series is practically the same as the RB series but runs on diesel. It is a single over head cam engine with electronic fuel injection. These engines are usually found on the Nissan Laurel and has a 2.8L capacity. RD engine owners have been known to replace the engine head with a higher quality custom head to convert the engine to petrol, thus creating a 2.8L petrol engine.

The Nismo RB26DETT N1 engine block uses an {{convert|86|mm|2|abbr=on}} bore which can be bored up to either {{convert|87|or|88|mm|2|abbr=on}}. The N1 block is cast with an identification mark of 24U, whereas the standard RB26DETT block is marked with 05U. The RB26DETT N1 block is compatible with all GT-R engine bays.

===RB26DETT Z1 and Z2===
The RB26DETT Z1 and Z2 (and often referred to as an "RB28DETT Z1/Z2") was the engine used in the [[Nissan Skyline GT-R#Z-Tune|Nissan Skyline GT-R Z-Tune]] built by Nismo. It uses a stronger RB26 block based on Nissan's Le Mans GT2 and GT500 racing vehicles (stamped with RRR), stroked crankshaft, upgraded turbochargers, and a higher bore and stroke at a displacement of 2.8 L. It produces {{cvt|500|PS|kW hp|0}} and {{convert|540|Nm|lbft kgm|abbr=on}} of torque.<ref name="nismo_z-tune">{{cite web|access-date=2007-08-30|url=https://www.nismo.co.jp/Z-tune/data_e/2.html|title=Nismo R34 Z-Tune description on Nismo website|archive-date=2007-10-06|archive-url=https://web.archive.org/web/20071006002043/http://www.nismo.co.jp/Z-tune/data_e/2.html|url-status=live}}</ref> The 'Z2' revision includes upgraded turbochargers supplied by [[Ishikawajima-Harima Heavy Industries|IHI]], and additional improvements to allow it to reach maximum RPM speeds of up to 8,000 rpm.

==RB30 (3.0L I6)==
===RB30E/ET===
[[File:1986-1988_Holden_Commodore_(VL)_Executive_Turbo_sedan_(17056084680).jpg|thumb|An RB30ET engine installed in an Australian-built Holden Commodore. Nissan supplied Holden with RB30E and RB30ET engines between 1986 and 1988.]]
'''RB30''' were produced from 1985 - 1991:
* '''RB30S [[Nissan Patrol Y60|GQ Patrol]]''' - carburetted single-cam {{convert|100|kW|hp PS|0|abbr=on}} at 4,800 rpm, {{convert|224|Nm|lbft kgm|abbr=on}} at 3000 rpm
* '''Powertech 6Ei (RB30E) [[Holden VL Commodore|VL Commodore]]''' - fuel-injected single-cam {{convert|114|kW|hp PS|0|abbr=on}} at 5,200&nbsp;rpm, {{convert|247|Nm|lbft kgm|abbr=on}} at 3,600&nbsp;rpm)
* '''RB30E [[Nissan Skyline#R31|R31 Skyline]]''' - fuel-injected single-cam {{convert|114|kW|hp PS|0|abbr=on}} at 5,200&nbsp;rpm, {{convert|247|Nm|lbft kgm|abbr=on}} at 3,600&nbsp;rpm) Initially quoted as 117 kW, 252 N⋅m but later revised
* '''RB30E [[Nissan Skyline#R31|R31 Skyline GTS1]]''' - fuel-injected single-cam {{convert|130|kW|hp PS|0|abbr=on}} at 5,500&nbsp;rpm, {{convert|255|Nm|lbft kgm|abbr=on}} at 3,900&nbsp;rpm)
* '''RB30E [[Nissan Skyline#R31|R31 Skyline GTS2]]''' - fuel-injected single-cam {{convert|140|kW|hp PS|0|abbr=on}} at 5,600&nbsp;rpm, {{convert|270|Nm|lbft kgm|abbr=on}} at 4,400&nbsp;rpm)
* '''Powertech 6EiT (RB30ET) [[Holden VL Commodore|VL Commodore]]''' - fuel-injected single-cam turbo {{convert|150|kW|hp PS|0|abbr=on}} at 5,600&nbsp;rpm, {{convert|296|Nm|lbft kgm|abbr=on}} at 3,200&nbsp;rpm)

This motor was produced for use in the [[Nissan Skyline|Skyline]]s, [[Nissan Patrol|Patrol]]s and rights bought by [[Holden]] because the Holden 202 (3.3 L) powering the [[Holden Commodore]] could no longer satisfy tightening emissions requirements, and with all new cars required to run on unleaded petrol by 1986 a quick replacement was needed. [[Nissan|Nissan Motor Co.]] sold the RB30E to Holden for the [[Holden VL Commodore|VL Commodore]]. Holden would give the engine the name 'Powertech 6Ei' and 'Powertech 6EiT' (for turbocharged applications), although these names would only appear in official videos and brochures, seldom being used outside of Holden content. The radiator being a cross flow design and is fitted lower in relation to the engine in the VL, there is an increased likelihood of air locks forming in the (alloy) cylinder head if the correct bleeding procedure isn't followed, causing this to overheat and warp. This was very unlikely in comparison to the R31 Skyline as the radiator is mounted higher.<ref>{{Cite web |url=http://www.carpoint.com.au/reviews/2004/medium-passenger/holden/commodore/holden-vl-commodore-198688-3482 |title=Holden VL Commodore (1986-88) – Car Reviews, News & Advice - CarPoint Australia |access-date=2011-07-30 |archive-date=2011-07-19 |archive-url=https://web.archive.org/web/20110719205516/http://www.carpoint.com.au/reviews/2004/medium-passenger/holden/commodore/holden-vl-commodore-198688-3482 |url-status=live }}</ref> The engine proved to be very reliable apart from this issue. The RB30S was found in some Middle Eastern R31 Skylines and some GQ Nissan Patrols. The RB30E was found in R31 Skylines and VL Commodores in Australia as well as in South African R31 Skylines (with {{convert|126|kW|PS hp|0|abbr=on}} at 5,000&nbsp;rpm and {{convert|260|Nm|lbft kgm|abbr=on}} at 3,500&nbsp;rpm)

The turbocharged RB30ET (producing {{convert|150|kW|PS hp|0|abbr=on}}) was found only in the [[Holden VL Commodore|VL Commodore]] due to the conditions set out by Holden to Nissan in the contract to supply engines. It consists of a lower compression RB30E bottom end, more powerful oil pump, knock sensor, [[Garrett AiResearch|Garrett]] T3 turbocharger, {{convert|250|cc|abbr=on}} injectors, different intake manifold and supporting ECU. The motor itself is still popular today in Australian and New Zealand motorsport and [[drag racing]] in VL Commodores, R31 Skylines and swaps in other vehicles.

Nissan Special Vehicles Division Australia produced two limited models of R31 Skylines, the GTS1 and GTS2. These contained slightly more powerful RB30E engines, containing longer opening duration cams and better flowing exhausts.
* '''GTS1 RB30E''' - injected single-cam {{convert|130|kW|PS hp|0|abbr=on}} at 5,500&nbsp;rpm, {{convert|255|Nm|lbft kgm|abbr=on}} at 3,500&nbsp;rpm) - special cam profile, special exhaust<ref name="gts1">{{cite book | first = James | last = Cleary | pages = 36–41 |date=November 1988 | title = Modern MOTOR (Australia) | quote = A new camshaft profile and modified exhaust combine to give the GTS {{convert|130|kW|PS hp|0|abbr=on}} of power at 5500&nbsp;rpm and {{convert|255|Nm|lbft kgm|abbr=on}} of torque at 3500&nbsp;rpm.}}</ref>
* '''GTS2 RB30E''' - injected single-cam {{convert|140|kW|PS hp|0|abbr=on}} at 5,600&nbsp;rpm, {{convert|270|Nm|lbft kgm|abbr=on}} at 4,400&nbsp;rpm) - special cam profile, special exhaust, piggy back computer, valve porting<ref name="gts2">{{cite book | pages = 58–63 |date=October 1989 | title = Car Australia | quote = Power is up to 140&nbsp;kW over the stock car's 114&nbsp;kW...}}</ref>

===RB30DE===
These rare engines were used in the [[Tommykaira]] M30 based on the R31 Skyline GTS and R32 Skyline GTSt. For the R31 M30, a modified RB20DE head was bolted onto the RB30E block. It delivered {{convert|177|kW|PS hp|0|abbr=on}} at 7000&nbsp;rpm and {{convert|294|Nm|lbft kgm|abbr=on}} at 4800&nbsp;rpm.<ref name=M30V1>{{cite web|url=https://hirocimacruiser.tumblr.com/post/164858012179/i-finally-managed-to-procure-a-brochure-for-the|title=Tommykaira M30 R31 brochure|website=Tumblr|access-date=2020-11-22|archive-date=2020-12-14|archive-url=https://web.archive.org/web/20201214104748/https://hirocimacruiser.tumblr.com/post/164858012179/i-finally-managed-to-procure-a-brochure-for-the|url-status=live}}</ref>

For the R32 M30, the bore was enlarged to 87&nbsp;mm and increased the displacement to 3030 cc. The head was also replaced with RB26DE head. This new version delivered {{convert|206|kW|PS hp|0|abbr=on}} at 7200&nbsp;rpm and {{convert|294|Nm|lbft kgm|abbr=on}} at 6100&nbsp;rpm.<ref name=M30V2>{{cite web|url=https://hirocimacruiser.tumblr.com/post/165134015189/tommykaira-m20-and-m30-based-on-the-r32-nissan|title=Tommykaira M20 and M30 based on the R32 Nissan Skyline|website=Tumblr|access-date=2020-11-22|archive-date=2019-06-07|archive-url=https://web.archive.org/web/20190607204857/https://hirocimacruiser.tumblr.com/post/165134015189/tommykaira-m20-and-m30-based-on-the-r32-nissan|url-status=live}}</ref>

More commonly a hybrid conversion with an RB30E block and a twin cam RB25 head without a turbo is also used as a basis for the RB30DE.

===RB30DET===
[[File:RB30DET.jpg|thumb|right|RB30DET - R31 RB30E block, R32 RB25DE head.]]

Nissan did not produce this engine. It refers to a turbocharged engine using an RB30E short block with the twin-cam head installed from another RB series engine. A common hybrid in Australia and New Zealand (referred to as the RB25/30 or RB26/30) uses an RB30E bottom end mated to a RB25DE, RB25DET or RB26DETT cylinder head and turbo (RB20DE and DET heads are not used as the bores are different in size (RB30 {{convert|86|mm|2|abbr=on}} RB20 {{convert|78|mm|2|abbr=on}}); but were originally modified and used on the [[Tommykaira]] RB30DE as the RB25 engine did not exist at the time). The RB25DE cylinder head from the A31 Cefiro C33 Laurel or R32 Skyline (aka: Non VCT) can be used. The RB25DET (from the R33 Skyline or C34 Laurel or Stagea) head is also used, however an external oil feed must be fabricated for the variable cam timing (VCT) on the RB25DET, and the oil galleries at the front of the engine are misaligned. The variable cam timing may be disconnected altogether. It may be necessary to reduce the size of the oil restrictors in the block and machine a full face oil pump drive collar onto the crank, (to prevent it shattering at high RPM), with the use of a twin cam oil pump.

The fitment of a twin cam head from any of these engines onto a standard compression RB30E bottom end gives a forced induction friendly compression ratio (around 8.2:1), for a mild to moderately modified street turbo engine, making the conversion popular amongst those who would otherwise convert their RB30E to a high compression RB30ET using original ET bolt on externals.

Although it has a larger displacement than the RB26DETT, maximum possible horsepower is less, as the RB30 block lacks the RB26 block's internal bracing, and consequently cannot rev as high due to harmonic issues at ~7500&nbsp;rpm. To compensate, the RB30DET produces more torque at lower revs due to its longer stroke. However they have been known to reach engine speeds up to 11,000&nbsp;rpm with extensive balancing and blueprinting.

There is also an 'RB30DETT' kit manufactured by OS Giken of Japan, which bolts an extension on top of the RB26 engine block, and fits liners, to give a bore and stroke of {{convert|86x86|mm|2|abbr=on}}. It is available as an assembled short block, containing billet chrome-molybdenum crank, billet chrome-molybdenum H-beam connecting rods, forged pistons, and costs ¥1,500,000.<ref name="osgiken">{{cite web |access-date= 2006-05-21 |url= http://www.osgiken.co.jp/pro_spec/rb30kit.html |title= OS Giken RB30 Kit |language= ja |url-status= dead |archive-url= https://web.archive.org/web/20060604005454/http://osgiken.co.jp/pro_spec/rb30kit.html |archive-date= 2006-06-04 }}</ref>

===RB-X GT2 and RB28DET (2.8L)===
The '''RB-X GT2''' (designed and built by '''REINIK''') is an engine specially made for the [[Nissan Skyline GT-R#1997 NISMO 400R|NISMO 400R]]. The difference between this engine and a RB26DETT is that the engine is bored and stroked {{convert|87x77.7|mm|2|abbr=on}} which results in {{convert|2770|cc|L|1|abbr=on}}. The engine produces {{convert|450|PS|hp kW|0|abbr=on}} at 6800&nbsp;rpm and {{convert|48|kgm|0|abbr=on}} at 4400&nbsp;rpm.<ref name="Nismo_400R_specs">{{cite web |access-date= 2007-08-30 |url= http://www.nismo.co.jp/complete/400R/spec2.html |title= Nismo 400R specification on Nismo website |language= ja |archive-date= 2007-08-25 |archive-url= https://web.archive.org/web/20070825154542/http://www.nismo.co.jp/complete/400R/spec2.html |url-status= live }}</ref>

This engine was manufactured with a reinforced cylinder block and cylinder head, metal head gasket, pistons with cooling channels, forged crank shaft, forged connecting rods, N1 turbine with reinforced actuator, high flow intake, stainless down pipe, and low exhaust resistant sport cats, most of which were not offered for the RB26DETT. RB-X GT2 engines competed in LeMans 24hr race, Pikes Peak, and other forms of motorsports. GT500 and Z-tune engines are also based on REINIK's design although later built by NISMO's Omori Factory.

'''REINIK''' also made over 20 '''RB28DET''' based on the R33 RB25DET. These engines were ordered by Prince Nissan Dealership network for a special edition R33 GT25t called '''280 Type-MR'''. The engine was built for high torque and limited to {{convert|300|PS|hp kW|0|abbr=on}} and {{convert|36|kgm|0|abbr=on}} of torque.

==Stroker kits==
There are many stroker kits available for RB Engines (some only available as proper kits while others being achievable by using cranks from other engines, for example a GT-R crank, pistons and rods in an RB25DET will make its displacement 2.6L as the Bore is the same as an RB26DETT).

Achievable Stroker Displacements for RB Engines:
*RB20 - 2.2, 2.4
*RB25 - 2.6, 2.7, 2.8
*RB26 - 2.7, 2.8, 2.9, 3.0, 3.15
*RB30 - 3.2 (Nitto), 3.3 (RIPS), 3.4 (Spool Imports)
*RB26 - 3.2, 3.3, and 3.4. (Project RB)


==See also==
==See also==
* [[List of Nissan engines]]
* [[List of Nissan engines]]

==References==
{{reflist}}


{{nissan}}
{{nissan}}


[[Category:Nissan engines|RB]]
[[Category:Nissan engines|RB]]
[[Category:Straight-six engines]]
[[Category:Gasoline engines by model]]

Latest revision as of 08:30, 28 December 2024

Nissan RB engine
RB26DETT in an R34 Skyline GT-R
Overview
ManufacturerNissan (Nissan Machinery)
Production1985–2004 (original)
2019–present (new production)[1][2]
Layout
ConfigurationStraight-six
Displacement2.0 L; 121.9 cu in (1,998 cc)
2.4 L; 148.2 cu in (2,428 cc)
2.5 L; 152.4 cu in (2,498 cc)
2.6 L; 156.7 cu in (2,568 cc)
2.8 L; 169.0 cu in (2,770 cc)
3.0 L; 180.8 cu in (2,962 cc)
Cylinder bore78 mm (3.07 in)
86 mm (3.39 in)
87 mm (3.43 in)
Piston stroke69.7 mm (2.74 in)
71.7 mm (2.82 in)
73.7 mm (2.90 in)
77.7 mm (3.06 in)
85 mm (3.35 in)
Cylinder block materialCast iron
Cylinder head materialAluminium
ValvetrainSOHC 2 valves x cyl.
DOHC 4 valves x cyl. with NVCS
Compression ratio7.8:1-10:1
Combustion
TurbochargerSingle Garrett T3; Twin Garrett T28-type ceramic with intercooler (RB26DETT)
Fuel systemCarburetor
Electronic Fuel injection
ManagementHitachi, NICS, ECCS
Fuel typeGasoline
Autogas
LPG
Cooling systemWater-cooled
Output
Power output94–278 PS (93–274 hp; 69–204 kW)
Torque output142–353 N⋅m (14–36 kg⋅m; 105–260 lb⋅ft)
Chronology
PredecessorNissan L engine
SuccessorNissan VQ engine
Nissan VR engine

The RB engine is an oversquare 2.0–3.0 L straight-6 four-stroke gasoline engine from Nissan, originally produced from 1985 to 2004. The RB followed the 1983 VG-series V6 engines to offer a full, modern range in both straight or V layouts.[3] It was part of a new engine family name PLASMA (Powerful & Economic, Lightweight, Accurate, Silent, Mighty, Advanced).

The RB engine family includes single overhead camshaft (SOHC) and double overhead camshaft (DOHC) engines.[4] Both SOHC and DOHC versions have an aluminium head. The SOHC versions have 2 valves per cylinder and the DOHC versions have 4 valves per cylinder; each cam lobe moves only one valve. All RB engines have belt driven cams and a cast iron block. Most turbo models have an intercooled turbo (the exceptions being the single cam RB20ET & RB30ET engines), and most have a recirculating factory blow off valve (the exceptions being when fitted to Laurels and Cefiros) to reduce compressor surge when the throttle quickly closes.

The RB engines are derived from the six-cylinder L20A engine, which has the same bore and stroke as the RB20. All RB engines were made in Yokohama, Japan where the VR38DETT engine was made. Some RB engines were rebuilt by Nissan's NISMO division at the Omori Factory in Tokyo as well. All Z-Tune Skylines were rebuilt at the Omori Factory.

After a 15-year hiatus, production of the RB series resumed in 2019.[5][6][7]

Bore and stroke

[edit]

All Nissan engines follow a naming convention, identifying the engine family (in this case, RB), displacement, features present—see the list of Nissan engines for details.

The stock dimensions for the Nissan RB Engine:

  • RB20 - 2.0 L (1,998 cc), bore x stroke: 78 mm × 69.7 mm (3.07 in × 2.74 in)
  • RB24 - 2.4 L (2,428 cc), bore x stroke: 86 mm × 69.7 mm (3.39 in × 2.74 in)
  • RB25 - 2.5 L (2,498 cc), bore x stroke: 86 mm × 71.7 mm (3.39 in × 2.82 in)
  • RB26 - 2.6 L (2,568 cc), bore x stroke: 86 mm × 73.7 mm (3.39 in × 2.90 in)
  • RB30 - 3.0 L (2,962 cc), bore x stroke: 86 mm × 85 mm (3.39 in × 3.35 in)
  • "D" indicates a dual overhead cam as opposed to a single overhead cam
  • "E" indicates the individual engine ports are electronically fuel-injected 'single-cam'
  • "S" indicates the engine is carbureted
  • "T" indicates the engine has a factory installed turbocharger
  • "TT" indicates the engine has factory installed twin turbochargers
  • "P" indicates the engine runs on LPG (liquefied petroleum gas)

RB20 (2.0L I6)

[edit]
RB20ET engine in an R31 Passage Wagon
RB20DET engine in Skyline GTS-4 (HNR32)

The first RB20ET/DE/DET engines were fitted to the HR31 Skyline and the Nissan Fairlady 200ZR (Z31 chassis), produced from August 1985. The early twin cam engines featured the NICS (Nissan Induction Control System) injection system, while the later twin cam engines used ECCS (Electronic Concentrated Control System).[8] Later versions which used ECCS engine management, discarded the twelve tiny runners for six much larger ones (though they retained twelve ports on the head, so there was a splitter plate). It was also fitted to the A31 Cefiro, C32 and C33 Laurel. The Fairlady 200ZR was fitted with an intercooled NICS type RB20DET.

The first RB20E engine was used in the C32 Nissan Laurel, produced from October 1984.

Laurels, R32 Skyline and Cefiros used the second (1989–1993) series RB20E/DE/DET. This had an improved head design, and used the ECCS injection system. These later motors are known as "Silver Top" engines.

The RB20DET-R was used in the Nissan Skyline 2000GTS-R (HR31) and was limited to 800 units.

There were a variety of 2.0 L RB20 engines produced:

  • RB20E
    single-cam
    Power: 95 to 110 kW (127 to 148 hp; 129 to 150 PS) at 5600 rpm
    Torque: 167 to 181 N⋅m (123 to 133 lb⋅ft; 17.0 to 18.5 kg⋅m) at 4000–4400 rpm
    Camshaft duration: 232° intake; 240° exhaust
    Camshaft lift: 7.3 mm intake, 7.8 mm exhaust
  • RB20ET
    single-cam, turbocharged
    Power: 125 kW (168 hp; 170 PS) at 6000 rpm
    Torque: 206 N⋅m (152 lb⋅ft; 21.0 kg⋅m) at 3200 rpm
  • RB20DE
    twin-cam
    Power: 110 to 114 kW (148 to 153 hp; 150 to 155 PS) at 6400 rpm
    Torque: 181 to 186 N⋅m (133 to 137 lb⋅ft; 18.5 to 19.0 kg⋅m) at 5600 rpm
    Camshaft duration: 232° intake, 240° exhaust
    Camshaft lift: 7.3 mm (0.29 in) intake, 7.8 mm (0.31 in) exhaust
  • RB20DET
    twin-cam, turbocharged
    Power: 158 kW (212 hp; 215 PS) at 6400 rpm
    Torque: 264 N⋅m (195 lb⋅ft; 26.9 kg⋅m) at 3200 rpm
    Camshaft duration: 240° intake, 240° exhaust; 248° intake, 240° exhaust ("Red Top")
    Camshaft lift: 7.3 mm (0.29 in) intake, 7.8 mm (0.31 in) exhaust; 7.8 mm (0.31 in) intake, 7.8 mm (0.31 in) exhaust ("Red Top")
  • RB20P
    single-cam, 12 valves, autogas LPG
    Power: 94 PS (69 kW; 93 hp) at 5600 rpm
    Torque: 142 N⋅m (105 lb⋅ft; 14.5 kg⋅m) at 2400 rpm
  • RB20DET-R
    twin-cam, turbocharged
    Power: 210 PS (154 kW; 207 hp) at 6400 rpm
    Torque: 245 N⋅m (181 lb⋅ft; 25.0 kg⋅m) at 4800 rpm
  • RB20DE NEO
    twin-cam
    Power: 155 PS (114 kW; 153 hp)
    Torque: 186 N⋅m (137 lb⋅ft; 19.0 kg⋅m)

RB24S (2.4L I6)

[edit]
Nissan RB24S engine, Carburetor, SOHC, used in the Latin American market Laurel Altima A31 (an export market name for the A31 Cefiro)

This is a comparatively rare engine, as it was not produced for the Japanese domestic market. These were fitted to some left hand drive Nissan Cefiros exported from Japan new. Mechanically, the RB24S combines an RB30E head, RB25DE/DET block and RB20DE/DET crank with 34 mm height pistons. The resulting 86 mm × 69.7 mm (3.39 in × 2.74 in) bore and stroke combined to form a 2.4 L (2,428 cc) inline-six engine.

This engine used carburetors instead of the Nissan ECCS fuel injection system. It is able to rev higher than the RB25DE/DET (as it has the same stroke as the RB20DE/DET) as well as being almost the same displacement as the RB25DE/DET. A common modification is to fit a twin cam head from other RB series motors while retaining the carburetor set-up. The standard single cam form produced 141 PS (139 hp; 104 kW) at 5,000 rpm and 20.1 kg⋅m (145 lb⋅ft; 197 N⋅m) of torque at 3,000 rpm.

RB25 (2.5L I6)

[edit]
1993 RB25DET with VCT (NVCS)
1998 NEO RB25DET
RB25DET and Transmission pulled from an R33 Skyline GTST

The RB25 series of engines was first introduced in the R32 Nissan Skyline GTS25 sedan and coupe models.[9][10] RB25DE (Naturally Aspirated) and DET (Turbocharged) engines produced from August 1993 also featured NVCS (Nissan Variable Cam System) for the intake cam. This gave the new RB25DE more power and torque at lower rpm than the previous model. From 1995,(Series 2 Engines) both the RB25DE and RB25DET had a revised electrical system and the turbocharger on the RB25DET(S2) had a ceramic turbine wheel rather than aluminium. The most obvious change to the system was the introduction of ignition coils with built in ignitors, therefore the coil ignitor that was on previous models was not used. Other changes were, different air flow meter, engine ECU, cam angle sensor and throttle position sensor. Mechanically Series 1 and Series 2 are very similar, the only mechanical difference would be the camshafts as the Series 2 Cam Angle Sensor's shaft that goes into the exhaust cam is slightly different. Early Series 2 featured the traditional Mitsubishi CAS which was later swapped for the Black Hitachi CAS which used a grooved shaft because of a half circle positioning tooth which occasionally broke off when removing CAS.

In May 1998 a NEO head was fitted, which enabled the engine to be classified as a low emission vehicle (LEV) engine due to their lower fuel consumption and emission output. The NEO head featured solid lifters(need to be adjusted overtime) rather than hydraulic(self adjusting), revised camshafts (higher lift lower duration to complement smaller ports and torque), with on/off solenoid Variable VCT, used a hotter 82 °C (180 °F) thermostat, model-specific coil packs and a revised inlet manifold (the runner diameter is reduced from 50 to 45 mm (2.0 to 1.8 in) to increase air velocity and low end torque) in particular the RB25DE NEO which had two inlets going into the inlet manifold. The combustion chamber of the head is smaller so model-specific pistons are used to compensate. The turbo received the larger OP6 turbine wheel, while some came with an aluminium compressor and super alloy turbine wheels, others had the nylon plastic compressor wheel and ceramic turbine wheel. Turbo engines were upgraded to use GT-R spec connecting rods. Some also used an N1 type oil pump and had the oil pump drive collar on the crank revised to help cope with the breakage problems associated with fast, high revs. All in all they are quite a different engine in their own right - a culmination of 20 years of Nissan RB engine building rolled into one.

The non-VCT, non-turbo RB25DE was fitted to the R32 Skyline, the VCT turbo and non-turbo was fitted to R33 Skylines and the WNC34 Stagea and the Laurel C34. R34 Skyline, C35 Laurel and later Stagea (WGNC34) models use the NEO RB.

The 2.5 L RB25 engine was produced in four different forms:

  • RB25DE
    twin-cam, non-turbo with 10:1 compression ratio
    Power: 180–200 hp (134–149 kW; 182–203 PS) at 6000 rpm
    Torque: 255 N⋅m (188 lb⋅ft; 26.0 kg⋅m) at 4000 rpm
  • RB25DET
    twin-cam, turbocharged (T3 Turbo) with 9:1 compression ratio
    Power: 245–250 hp (183–186 kW; 248–253 PS)
    Torque: 319 N⋅m (235 lb⋅ft; 32.5 kg⋅m)
  • RB25DE NEO
    twin-cam, non-turbo with 10:1 compression ratio
    Power: 197 hp (147 kW; 200 PS) at 6000 rpm
    Torque: 255 N⋅m (188 lb⋅ft; 26.0 kg⋅m) at 4000 rpm
  • RB25DET NEO
    twin-cam, turbocharged (T3 Turbo, "45V3" with OP-6 Compressor) with 9:1 compression ratio
    Power: 276 hp (206 kW; 280 PS) at 6400 rpm
    Torque: 362 N⋅m (267 lb⋅ft; 36.9 kg⋅m) at 3200 rpm)

RB26 (2.6L I6)

[edit]

RB26DE

[edit]

The RB26DE is a naturally aspirated variant of the RB26DETT made specifically for the 1992 Nissan Skyline Autech Version GTS-4 (HNR32) sedan.[11][12][13] Mechanically, it is similar to the RB26DETT as it uses the same cylinder head, bore and stroke (86 mm × 73.7 mm (3.39 in × 2.90 in)) and individual intakes as the RB26DETT, minus the usage of a parallel twin-turbo system. The engine and ECU (engine control unit) were tuned by Autech and S&S Engineering to make 220 PS (162 kW; 217 hp) at 6,800rpm and 245 N⋅m (181 lb⋅ft; 25.0 kg⋅m) at 5,200rpm. It also has a higher compression ratio than the RB26DETT, at 10.5:1.

RB26DETT

[edit]
This Nissan RB26DETT engine is on display at the Nissan Engine Museum in Yokohama, Japan.

The RB26DETT engine is a 2.6 L (2,568 cc) twin-turbo inline-six engine manufactured by Nissan, for use in the 1989-2002 Nissan Skyline GT-R. The RB26DETT engine block is made from cast iron, while the cylinder head is made from aluminium alloy, which contains DOHC 4 valves per cylinder (24 valves in total) setup. The intake of the RB26DETT varies from other RB-series motors in that it has six individual (3 sets of 2 throttle assemblies that are siamesed together) instead of a single throttle body. The engine also uses a parallel twin-turbo system, using a pair of T25-type ceramic turbochargers set by the wastegates to limit boost pressure to 10 psi (0.69 bar), although the Skyline GT-R has a built in boost restrictor to keep boost under 14 psi (0.97 bar).

The first 2.6 L RB26DETT was rated by Nissan at around 276 bhp (280 PS; 206 kW) at 6,800 rpm and 353 N⋅m; 260 lbf⋅ft (36 kg⋅m) at 4,400 rpm. By the end of production, power levels had gone up to around 320 PS (235 kW; 316 hp) at 6,800 rpm and 392 N⋅m; 289 lbf⋅ft (40 kg⋅m) at 4,400 rpm,[14][15][16] not only because of developments and modifications to the engine, but also because of the "Gentlemen's Agreement" made between automakers at the time to limit the "advertised" horsepower of any vehicle to 280 PS (276 bhp; 206 kW). While the published figures from Nissan were as quoted above, it has been known among enthusiasts that the car actually had a factory power output closer to the 320 PS (235 kW; 316 hp) figure.[17] The RB26 is widely known and became quite popular for its strength and power potential thanks to its iron block and forged internals, making it a modification friendly platform for tuners and aftermarket modifications in general.[18][19]

Duration Lift
Camshaft Intake Exhaust Intake Exhaust
RB26DETT (05U) 240° 236° 8.58 mm (0.338 in) 8.28 mm (0.326 in)
RB26DETT N1 (24U) 240° 236° 8.58 mm (0.338 in) 8.28 mm (0.326 in)

Some factory features of the RB26DETT:

  • 6 throttle body intake
  • Solid lifter valve actuation, shim under bucket
  • Belt driven cams
  • CAS (crank angle sensor) driven off exhaust cam, tells ECU (engine control unit) crank/cam position
  • water cooled, oil pressure lubed turbos
  • OEM cast pistons have cooling channels under the crowns (extra oil cooling to keep piston temperatures down)
  • Piston oil squirters
  • Sodium filled exhaust valves
  • 8 Counter weighted crankshaft
  • 'I' beam connecting rods

There is a common oiling problem with the pre-1992 R32 RB26 motors, as the surface where the crankshaft meets the oil pump was machined too small, eventually leading to oil pump failure at high rpm. This issue was resolved in later versions of the RB26 with a wider oil pump drive, which is found in all R33+ RB26 motors. Aftermarket performance parts makers also make oil pump extension drive collars to rectify this problem. More recently a spline drive solution has been developed by an aftermarket tuner Supertec Racing who moves away from the OEM flat drive system and uses splines to drive the oil pump gears in the same way as the Toyota's 1JZ-GTE engine found in the Toyota Supra (MK3). This kit is available for most uprated RB26 oil pumps including Nissan's own OEM, N1 and Nismo parts, although most high HP RB-series engines all over the world have been proven to be reliable without spline driven oil pumps when built and tuned correctly.

Besides minor cosmetic updates and ECU fine tunings, changes were made in the R34 generation to ball bearing T28 turbochargers as opposed to journal bearing turbos. The R34 GT-R turbos retained the ceramic exhaust turbine wheel. Models that had steel exhaust turbine wheels included the R32 Nismo, R32-R33-R34 N1 models and R34 Nür spec skyline GT-R's.

R34 GT-R model RB26DETT engine specific differences to the R32-R33 engines include:

  • Candy red cam/coil pack covers
  • Different coil cover emblem
  • Plastic CAM gear cover
  • Non-painted inlet plenum (apparently also a lighter casting)
  • Hitachi CAS (Crank angle sensor) has different drive fitting compared to earlier R32-R33 exhaust cams
  • Igniter built into coil packs (no igniter pack on the rear of coil cover)
  • Ball bearing turbochargers with ceramic exhaust turbine wheels
  • Stainless steel dump pipes
  • Sump front differential has a different ratio (3:55)
  • Different diameter coolant/heater pipes on intake side of block
  • Dual mass flywheel

Originally, the R32 GT-R was planned to have the 2.4 L RB24DETT and compete in the 4000 cc class (in Group A rules, the displacement is multiplied by 1.7 if the engine is turbocharged). This was at a time when Nismo was going through the process of designing the R32 GT-R to be a Group A race car. However, when the engineers added the AWD system, they found that it made the car heavier than expected and as a result, much less competitive. Nismo made the decision to make the engine a 2.6 L twin-turbo and compete in the higher 4500 cc class, resulting in the RB26DETT engine many known today.[citation needed]

The Nissan Skyline GT-R V-spec II (BNR34) is powered by the RB26DETT.

The RB26DETT was used in the following vehicles:

RB26DETT N1

[edit]

The RB26DETT N1 is a modified version of the RB26DETT engine, developed by Nismo (Nissan Motorsports) for Group A and Group N motorsport. Nismo found that the standard RB26DETT engine required too much maintenance for use in a Group-A or Group-N race car and subsequently designed the N1 block; this was first used in Bathurst, Australia. Nismo balanced the crankshaft to a higher specification than stock, as the standard RB26DETT engine experiences vibrations between 7,000 and 8,000 rpm. The engine also received improved water and oil channels within the engine block. The pistons and top piston rings were also upgraded to 1.2 mm (0.047 in). The N1 engine also has upgraded camshafts and upgraded turbochargers.

Although all versions of the RB26DETT N1 engine use Garrett T25 turbochargers, the specification of the turbochargers changed through the 3 generations of the RB26DETT N1 engine (R32, R33, and R34). The R32, and R33 versions used Journal Bearing T25 Turbochargers. The R34 RB26DETT N1 engine used Garrett GT25 turbo chargers (which use a set of ball bearings).

The biggest difference between the turbochargers used in the N1 engine, and the standard RB26DETT engine, is that the turbine wheels in the turbocharger are made from steel, rather than the ceramic used for the standard RB26DETT turbochargers. The ceramic turbine wheels are found to be very unreliable when used at high rotational speeds inducing higher centrifugal forces (such as when the turbochargers are used at a higher boost pressure than stock). With the advances in manufacturing technology such as sealing and material processes.

The Nismo RB26DETT N1 engine block uses an 86 mm (3.39 in) bore which can be bored up to either 87 or 88 mm (3.43 or 3.46 in). The N1 block is cast with an identification mark of 24U, whereas the standard RB26DETT block is marked with 05U. The RB26DETT N1 block is compatible with all GT-R engine bays.

RB26DETT Z1 and Z2

[edit]

The RB26DETT Z1 and Z2 (and often referred to as an "RB28DETT Z1/Z2") was the engine used in the Nissan Skyline GT-R Z-Tune built by Nismo. It uses a stronger RB26 block based on Nissan's Le Mans GT2 and GT500 racing vehicles (stamped with RRR), stroked crankshaft, upgraded turbochargers, and a higher bore and stroke at a displacement of 2.8 L. It produces 500 PS (368 kW; 493 hp) and 540 N⋅m (400 lb⋅ft; 55 kg⋅m) of torque.[21] The 'Z2' revision includes upgraded turbochargers supplied by IHI, and additional improvements to allow it to reach maximum RPM speeds of up to 8,000 rpm.

RB30 (3.0L I6)

[edit]

RB30E/ET

[edit]
An RB30ET engine installed in an Australian-built Holden Commodore. Nissan supplied Holden with RB30E and RB30ET engines between 1986 and 1988.

RB30 were produced from 1985 - 1991:

  • RB30S GQ Patrol - carburetted single-cam 100 kW (134 hp; 136 PS) at 4,800 rpm, 224 N⋅m (165 lb⋅ft; 22.8 kg⋅m) at 3000 rpm
  • Powertech 6Ei (RB30E) VL Commodore - fuel-injected single-cam 114 kW (153 hp; 155 PS) at 5,200 rpm, 247 N⋅m (182 lb⋅ft; 25.2 kg⋅m) at 3,600 rpm)
  • RB30E R31 Skyline - fuel-injected single-cam 114 kW (153 hp; 155 PS) at 5,200 rpm, 247 N⋅m (182 lb⋅ft; 25.2 kg⋅m) at 3,600 rpm) Initially quoted as 117 kW, 252 N⋅m but later revised
  • RB30E R31 Skyline GTS1 - fuel-injected single-cam 130 kW (174 hp; 177 PS) at 5,500 rpm, 255 N⋅m (188 lb⋅ft; 26.0 kg⋅m) at 3,900 rpm)
  • RB30E R31 Skyline GTS2 - fuel-injected single-cam 140 kW (188 hp; 190 PS) at 5,600 rpm, 270 N⋅m (200 lb⋅ft; 28 kg⋅m) at 4,400 rpm)
  • Powertech 6EiT (RB30ET) VL Commodore - fuel-injected single-cam turbo 150 kW (201 hp; 204 PS) at 5,600 rpm, 296 N⋅m (218 lb⋅ft; 30.2 kg⋅m) at 3,200 rpm)

This motor was produced for use in the Skylines, Patrols and rights bought by Holden because the Holden 202 (3.3 L) powering the Holden Commodore could no longer satisfy tightening emissions requirements, and with all new cars required to run on unleaded petrol by 1986 a quick replacement was needed. Nissan Motor Co. sold the RB30E to Holden for the VL Commodore. Holden would give the engine the name 'Powertech 6Ei' and 'Powertech 6EiT' (for turbocharged applications), although these names would only appear in official videos and brochures, seldom being used outside of Holden content. The radiator being a cross flow design and is fitted lower in relation to the engine in the VL, there is an increased likelihood of air locks forming in the (alloy) cylinder head if the correct bleeding procedure isn't followed, causing this to overheat and warp. This was very unlikely in comparison to the R31 Skyline as the radiator is mounted higher.[22] The engine proved to be very reliable apart from this issue. The RB30S was found in some Middle Eastern R31 Skylines and some GQ Nissan Patrols. The RB30E was found in R31 Skylines and VL Commodores in Australia as well as in South African R31 Skylines (with 126 kW (171 PS; 169 hp) at 5,000 rpm and 260 N⋅m (190 lb⋅ft; 27 kg⋅m) at 3,500 rpm)

The turbocharged RB30ET (producing 150 kW (204 PS; 201 hp)) was found only in the VL Commodore due to the conditions set out by Holden to Nissan in the contract to supply engines. It consists of a lower compression RB30E bottom end, more powerful oil pump, knock sensor, Garrett T3 turbocharger, 250 cc (15 cu in) injectors, different intake manifold and supporting ECU. The motor itself is still popular today in Australian and New Zealand motorsport and drag racing in VL Commodores, R31 Skylines and swaps in other vehicles.

Nissan Special Vehicles Division Australia produced two limited models of R31 Skylines, the GTS1 and GTS2. These contained slightly more powerful RB30E engines, containing longer opening duration cams and better flowing exhausts.

  • GTS1 RB30E - injected single-cam 130 kW (177 PS; 174 hp) at 5,500 rpm, 255 N⋅m (188 lb⋅ft; 26.0 kg⋅m) at 3,500 rpm) - special cam profile, special exhaust[23]
  • GTS2 RB30E - injected single-cam 140 kW (190 PS; 188 hp) at 5,600 rpm, 270 N⋅m (200 lb⋅ft; 28 kg⋅m) at 4,400 rpm) - special cam profile, special exhaust, piggy back computer, valve porting[24]

RB30DE

[edit]

These rare engines were used in the Tommykaira M30 based on the R31 Skyline GTS and R32 Skyline GTSt. For the R31 M30, a modified RB20DE head was bolted onto the RB30E block. It delivered 177 kW (241 PS; 237 hp) at 7000 rpm and 294 N⋅m (217 lb⋅ft; 30.0 kg⋅m) at 4800 rpm.[25]

For the R32 M30, the bore was enlarged to 87 mm and increased the displacement to 3030 cc. The head was also replaced with RB26DE head. This new version delivered 206 kW (280 PS; 276 hp) at 7200 rpm and 294 N⋅m (217 lb⋅ft; 30.0 kg⋅m) at 6100 rpm.[26]

More commonly a hybrid conversion with an RB30E block and a twin cam RB25 head without a turbo is also used as a basis for the RB30DE.

RB30DET

[edit]
RB30DET - R31 RB30E block, R32 RB25DE head.

Nissan did not produce this engine. It refers to a turbocharged engine using an RB30E short block with the twin-cam head installed from another RB series engine. A common hybrid in Australia and New Zealand (referred to as the RB25/30 or RB26/30) uses an RB30E bottom end mated to a RB25DE, RB25DET or RB26DETT cylinder head and turbo (RB20DE and DET heads are not used as the bores are different in size (RB30 86 mm (3.39 in) RB20 78 mm (3.07 in)); but were originally modified and used on the Tommykaira RB30DE as the RB25 engine did not exist at the time). The RB25DE cylinder head from the A31 Cefiro C33 Laurel or R32 Skyline (aka: Non VCT) can be used. The RB25DET (from the R33 Skyline or C34 Laurel or Stagea) head is also used, however an external oil feed must be fabricated for the variable cam timing (VCT) on the RB25DET, and the oil galleries at the front of the engine are misaligned. The variable cam timing may be disconnected altogether. It may be necessary to reduce the size of the oil restrictors in the block and machine a full face oil pump drive collar onto the crank, (to prevent it shattering at high RPM), with the use of a twin cam oil pump.

The fitment of a twin cam head from any of these engines onto a standard compression RB30E bottom end gives a forced induction friendly compression ratio (around 8.2:1), for a mild to moderately modified street turbo engine, making the conversion popular amongst those who would otherwise convert their RB30E to a high compression RB30ET using original ET bolt on externals.

Although it has a larger displacement than the RB26DETT, maximum possible horsepower is less, as the RB30 block lacks the RB26 block's internal bracing, and consequently cannot rev as high due to harmonic issues at ~7500 rpm. To compensate, the RB30DET produces more torque at lower revs due to its longer stroke. However they have been known to reach engine speeds up to 11,000 rpm with extensive balancing and blueprinting.

There is also an 'RB30DETT' kit manufactured by OS Giken of Japan, which bolts an extension on top of the RB26 engine block, and fits liners, to give a bore and stroke of 86 mm × 86 mm (3.39 in × 3.39 in). It is available as an assembled short block, containing billet chrome-molybdenum crank, billet chrome-molybdenum H-beam connecting rods, forged pistons, and costs ¥1,500,000.[27]

RB-X GT2 and RB28DET (2.8L)

[edit]

The RB-X GT2 (designed and built by REINIK) is an engine specially made for the NISMO 400R. The difference between this engine and a RB26DETT is that the engine is bored and stroked 87 mm × 77.7 mm (3.43 in × 3.06 in) which results in 2,770 cc (2.8 L). The engine produces 450 PS (444 hp; 331 kW) at 6800 rpm and 48 kg⋅m (471 N⋅m; 347 lbf⋅ft) at 4400 rpm.[28]

This engine was manufactured with a reinforced cylinder block and cylinder head, metal head gasket, pistons with cooling channels, forged crank shaft, forged connecting rods, N1 turbine with reinforced actuator, high flow intake, stainless down pipe, and low exhaust resistant sport cats, most of which were not offered for the RB26DETT. RB-X GT2 engines competed in LeMans 24hr race, Pikes Peak, and other forms of motorsports. GT500 and Z-tune engines are also based on REINIK's design although later built by NISMO's Omori Factory.

REINIK also made over 20 RB28DET based on the R33 RB25DET. These engines were ordered by Prince Nissan Dealership network for a special edition R33 GT25t called 280 Type-MR. The engine was built for high torque and limited to 300 PS (296 hp; 221 kW) and 36 kg⋅m (353 N⋅m; 260 lbf⋅ft) of torque.

Stroker kits

[edit]

There are many stroker kits available for RB Engines (some only available as proper kits while others being achievable by using cranks from other engines, for example a GT-R crank, pistons and rods in an RB25DET will make its displacement 2.6L as the Bore is the same as an RB26DETT).

Achievable Stroker Displacements for RB Engines:

  • RB20 - 2.2, 2.4
  • RB25 - 2.6, 2.7, 2.8
  • RB26 - 2.7, 2.8, 2.9, 3.0, 3.15
  • RB30 - 3.2 (Nitto), 3.3 (RIPS), 3.4 (Spool Imports)
  • RB26 - 3.2, 3.3, and 3.4. (Project RB)

See also

[edit]

References

[edit]
  1. ^ Vijayenthiran, Viknesh (March 29, 2019). "Nissan Skyline GT-R's RB26 engine back in production". Motor Authority. Archived from the original on April 21, 2019. Retrieved April 16, 2019.
  2. ^ Chin, Chris (2019-03-28). "Nissan puts legendary RB26 inline-six engine back into production". Auto Blog. Archived from the original on 2019-03-29.
  3. ^ Data File 1987, Tokyo, Japan: Nissan Motor Co., Ltd., April 1987, p. 11
  4. ^ Ishida, Y.; Ito, K.; Kita, Y.; Kadowaki, S. (1986-01-01). "Nissan's new in-line DOHC six cylinder engine and its development". OSTI 5702884.
  5. ^ Heatley, Tyler (2019-04-02). "Nissan's Iconic RB26 Engine Returns To Production". Yahoo News. Archived from the original on 2019-12-24. Retrieved 2019-12-24.
  6. ^ Silvestro, Brian (2019-03-29). "The Nissan Skyline GT-R's RB26 Inline-Six Is Going Back Into Production". Road & Track. Archived from the original on 2020-07-08. Retrieved 2020-01-19.
  7. ^ Weiner, Eric (2019-03-28). "Nissan is restarting production of the Skyline's RB26 straight-six". Hagerty. Archived from the original on 2020-12-14. Retrieved 2020-01-19.
  8. ^ "AutoSpeed - The Late-Model Nissan RB Guide". www.autospeed.com. Retrieved 2022-11-06.
  9. ^ "Skyline Encyclopedia". Southern Skylines. Archived from the original on 2017-04-09. Retrieved 2016-12-21.
  10. ^ "Nissan Skyline ECR32 VIN Table".
  11. ^ "1992 Nissan Skyline Autech Version". www.autech.co.jp. Retrieved 20 November 2021.
  12. ^ "1992 Nissan Skyline 26 Autech Version". gtr-registry.com. Retrieved 20 November 2021.
  13. ^ "Nissan Skyline R32 Autech Version". gtr-registry.com.
  14. ^ "1990 Nissan Skyline GT-R R32". carfolio.com. 28 February 2013. Archived from the original on 25 July 2018. Retrieved 24 July 2018.
  15. ^ "1990 Nissan Skyline GT-R R32 Nismo". automobile-catalog.com. Retrieved 24 July 2018.
  16. ^ Owen, Nick D.; Owen, Richard, eds. (2 February 2016). "1989 Nissan Skyline GT-R". supercars.net. Archived from the original on 14 December 2020. Retrieved 24 July 2018.
  17. ^ "Does the stock R32 GTR really only make 276 horsepower?". RB MOTORING - JDM importer. Archived from the original on 2019-03-27. Retrieved 2019-02-25.
  18. ^ Turbo and High-tech Performance #186. July 2006.
  19. ^ "Ex Vi Termini: GTR-700 specifications". Archived from the original on 2006-11-13. Retrieved 2006-08-24.
  20. ^ "Nissan Skyline Autech Version 40th Anniversary". gtr-registry.com. Retrieved 21 November 2021.
  21. ^ "Nismo R34 Z-Tune description on Nismo website". Archived from the original on 2007-10-06. Retrieved 2007-08-30.
  22. ^ "Holden VL Commodore (1986-88) – Car Reviews, News & Advice - CarPoint Australia". Archived from the original on 2011-07-19. Retrieved 2011-07-30.
  23. ^ Cleary, James (November 1988). Modern MOTOR (Australia). pp. 36–41. A new camshaft profile and modified exhaust combine to give the GTS 130 kW (177 PS; 174 hp) of power at 5500 rpm and 255 N⋅m (188 lb⋅ft; 26.0 kg⋅m) of torque at 3500 rpm.
  24. ^ Car Australia. October 1989. pp. 58–63. Power is up to 140 kW over the stock car's 114 kW...
  25. ^ "Tommykaira M30 R31 brochure". Tumblr. Archived from the original on 2020-12-14. Retrieved 2020-11-22.
  26. ^ "Tommykaira M20 and M30 based on the R32 Nissan Skyline". Tumblr. Archived from the original on 2019-06-07. Retrieved 2020-11-22.
  27. ^ "OS Giken RB30 Kit" (in Japanese). Archived from the original on 2006-06-04. Retrieved 2006-05-21.
  28. ^ "Nismo 400R specification on Nismo website" (in Japanese). Archived from the original on 2007-08-25. Retrieved 2007-08-30.