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The RB engine is a 2.0L to 3.0L straight-6 four-stroke gasoline engine from Nissan.

Both SOHC and DOHC versions have an aluminum head. The SOHC versions have 2 valves per cylinder and the DOHC versions have 4 valves per cylinder, all cam lobes move only one valve. All RB engines have belt driven cams and a cast iron block. All turbo models have an intercooled turbo (except the single cam RB20ET & RB30ET engines), and most have a recirculating factory blow off valve (except when fitted to Laurels and Cefiros) to reduce boost surge when the throttle is closed.

Some sources indicate the ‘RB’ name stands for ‘Race Bred’, although this is disputed. The Nissan RB Engine is derived from the 6 cylinder Nissan L20A engine which has the same bore and stroke.

Bore and stroke

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

The stock dimensions for the RB engines;

• RB20 - 2.0 L (1998 cc, bore: 78.0 mm, stroke: 69.7 mm)
• RB24 - 2.4 L (2428 cc, bore: 86.0 mm, stroke: 69.7 mm)
• RB25 - 2.5 L (2498 cc, bore: 86.0 mm, stroke: 71.7 mm)
• RB26 - 2.6 L (2568 cc, bore: 86.0 mm, stroke: 73.7 mm)
• RB30 - 3.0 L (2982 cc, bore: 86.0 mm, stroke: 85.0 mm)
• “D” indicates a double overhead cam as opposed to a single overhead cam
• “E” indicates the engine is electronically fuel-injected as opposed to carbureted
• “T” indicates the engine has a factory installed turbocharger

RB20

There were a variety of 2.0 L RB20 engines produced:

• RB20E - single-cam (85 to 96 kW (115 to 130 ps) @ 5600 rpm, 167 to 181 N·m (17 to 18,5 kgf·m) @ 4400 rpm)
• RB20ET - single-cam turbocharged (107 kW (145 PS) @ 6000 rpm, 206 N·m (21.0 kgf·m) @ 3200 rpm)
• RB20DE - twin-cam (110 to 114 kW (150 to 155 PS) @ 6400 rpm, 181 to 186 N·m (18.5 to 19 kgf·m) @ 5600 (and later with a NEO-Head 4400 rpm)
• RB20DET - twin-cam turbocharged (158 kW (215 PS) @ 6400 rpm, 265 N·m (27.0 kgf·m) @ 3200 rpm)
• RB20P - single-cam (94 PS @5600 rpm and 142 N·m @2400 rpm)
• RB20DET-R - twin-cam turbocharged (210 ps @6400 rpm and 245 N·m @4800 rpm

The first RB20E/ET/DE/DET engines were fitted to the R31 Skyline. The early twin cam engines are generally referred to as ‘Red Top’ engines because they have red cam covers. The early twin cam engines featured the NICS (Nissan Induction Control System) injection system, while the single cam engines always used ECCS (Electronically Concentrated Control System). Later ‘Red Top’ twin cam engines used in the R31 series Skylines from late 1987 onward use the ECCS system and a different intake manifold arrangement. The RB20E was also fitted to some Holden Commodores (the VL Commodore) sold in New Zealand, and also to the A31 Cefiro. The Z31 200ZR was fitted with an intercooled NICS type RB20DET.

Laurels, R32 Skyline and Cefiros used the second (1988-1993) 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). It is limited to 800 units.

The RB20P is the autogas LPG (Liquified petroleum gas) version of the RB20, but with 12 valves (OHC).

RB24S

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 height pistons. This engine used carburretors instead of the Nissan ECCS fuel injection system. It is 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 displacement as the RB25DE/DET. A common modification is to fit a twin cam head from other RB series motors while retaining the carburreted set-up. The standard single cam form produced 141 PS @ 5000 rpm and 20.1  kgf·m (197 N·m) of torque @ 4400 rpm.

RB25

The 2.5 L RB25 engine was produced in three forms:

• RB25DE - NON - TURBO twin-cam 140 kW/190 PS and 147 kW/200 PS (with VCT) @ 6000 rpm, 255 N·m (26.0 kgf·m) @ 4000 rpm)
• RB25DET - twin-cam turbo (T28 Turbo) (245 to 250 hp and 319 N·m)
• NEO RB25DET - twin-cam turbo (206 kW (280 PS) @ 6400 rpm, 362 N·m (37.0 kgf·m) @ 3200 rpm)

RB25DE and DET 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.

In May 1998 a NEO head was fitted, which enabled the engine to be classified as 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 the WC34 Stagea. R34 Skylines also use these engines, but they are fitted with a NEO head.

RB26DETT

The RB26DETT engine is a 2.6L Inline-6 engine manufactured by Nissan, for use primarily in the 1989-2002 Nissan Skyline GT-R. The RB26DETT engine block is made from cast iron, and the cylinder head is made from aluminium. The cylinder head contains 24 valves (4 valves per cylinder), and uses a dual overhead camshaft setup. The engine also uses a parallel twin turbo system. The turbo system is arranged so that the front turbo is powered by the front 3 cylinders, and the rear turbo is powered by the rear 3 cylinders. The turbo chargers are of equal size, and are set by the wastegates to limit boost pressure to 14.7 psi, although the Skyline GT-R has a built in boost restrictor to keep boost under 10 psi.

It is often possible to produce 600hp without modification of the engine internals (by use of larger turbocharger, and either keeping the stock twin turbo arrangement, or using a single turbocharger). With extreme modification, the RB26 motor is capable of power in excess of 1 megawatt (or over 1,340 hp).

There is a common oiling problem with the pre-1992 R32 RB26 motors, as the surface where the crank meets the oil pump was machined too small, eventually leading to oil pump failure at high rpm. This was fixed for later versions of the RB26.

Originally the R32 GT-R was planned to have a 2.4L 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 when Nismo was going through the process of designing the R32 GT-R to be a Group A race car. But when the engineers added the AWD system, it would make the car heavy and less competitive. Nismo made the decision to make the engine a 2.6L twin turbo, and compete in the 4500 cc class, resulting in the RB26DETT known today.

The RB26DETT was used in the following cars:

• Nissan Skyline GT-R R32
• Nissan Skyline GT-R R33
• Nissan Skyline GT-R R34
• Nissan Stagea 260RS
• Tommy Kaira ZZ II

RB26DETT N1

The RB26DETT N1 is a modified version of the RB26DETT engine. Nismo (Nissan Motorsports) found that the standard RB26DETT engine required too much maintenance to use in a Group-A or Group-N race car. As an upgrade, Nismo balanced the crankshaft to a higher specification than stock, as the RB26DETT engine experiences vibrations between 7000 and 8000 rpm. The engine also has improved water channels within the engine block. The top piston rings were also upgraded to 1.2 mm. The N1 engine also received 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 Ball Bearing, and has much faster response than a Journal Bearing due to reduced friction).

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 higher temperatures (such as when the turbochargers are used at a higher boost pressure than stock).

RB26DETT Z2

This is the engine used in the Nissan Skyline GT-R Z-Tune. It uses the stronger RB26 N-1 block, modified with Nismo parts, bored and stroked to 2.8 L (87.0 x 77.7 mm). The end result was the RB28Z2, which produces 500 hp (368 kW) and 540 N·m of torque.

RB30

Three models of 3.0 L RB30 were produced:

• RB30S - carbureted single-cam
• RB30E - fuel-injected single-cam (114 kW @ 5200 rpm, 247 N·m (25.2 kgf·m) @ 3600 rpm)
• RB30E R31 Skyline - fuel-injected single-cam (117 kW @ 5200 rpm, 252 N·m (25.2 kgf·m) @ 3600 rpm)
• RB30ET VL Commodore - fuel-injected single-cam turbo (150 kW @ 5600 rpm, 296 N·m @ 3200 rpm)

This motor was produced because the Holden 202 (3.3 L) powering the Holden Commodore could no longer satisfy 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. The RB30E in the VL suffered from cylinder head cracking due to the radiator being fitted lower in the engine bay, causing air locks in the cylinder head. This was not as severe in R31 Skyline as the radiator is mounted higher. The engine proved to be very reliable apart from this issue. The RB30S was found in some Middle Eastern R31 Skylines and in some 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 @ 5000 rpm and 260 Nm @ 3500 rpm)

The turbocharged RB30ET (producing 150 kW) was found only in the VL Commodore (available in all Calais) and consisted of a lower compression RB30E bottom end, more powerful oil pump, T3 Garrett turbocharger, 250 cc injectors and a different intake manifold. The motor itself is still popular today (albeit in highly modified form) on the Australian Drag Racing circuit.

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

• GTS1 RB30E - injected single-cam (130 kW @ 5500 rpm, 255 Nm (26.0 kgf·m) @ 3500 rpm) - special cam profile, special exhaust^.
• GTS2 RB30E - injected single-cam (140 kW @ 5600 rpm, 270 N·m (27.5 kgf·m) @ 4400 rpm) - special cam profile, special exhaust, piggy back computer, valve porting^.

RB30DE

These rare engines were used in the Tommy Kaira M30 based on the R31 Skyline GTS-R. A modified RB20DE head was bolted on to the RB30E block. It delivered 177 kW (240 PS) @ 7000 rpm and 294 N·m (30.0 kgf·m) @ 4800 rpm.

RB30DET

Nissan did not produce this engine, but it refers to a turbocharged engine featuring an RB30E block with a twin-cam head conversion. Common hybrid in Australasia using a 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 86.0mm RB20 78.0mm). The RB25DE cylinder head from the R32 Skyline, A31 Cefiro or C33 Laurel can be used, and fits perfectly on (although better valve springs are required to prevent valve float when running any more than stock boost). 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 on the RB25DET, and the galleries at the front of the engine do not line up. The variable cam timing may be disconnected altogether.

The fitment of a twin cam head from any of these engines onto a standard compression RB30E bottom end gives an ideal compression ratio 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 cast-in bracing, and consequently cannot rev as high due to harmonic issues at ~7500 rpm. To compensate, the RB30DET produces more torque at lower revs. 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 an 86 mm bore x 86 mm stroke. 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.

RB-X GT2

The RB-X GT2 (also called 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 (87.0 × 77.7 mm) which results in 2771 cc. Engine gives out 400 PS (331 kW) at 6800 rpm and 47.8 kgf·m (469 N·m or 347 lbf·ft) at 4400 rpm. This engine comes 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 air cleaner, stainless down pipe, and low air resistance sport catalizer, most of which were not offered for the RB26DETT.

Well I barely remember that my last blog post is on year 2007… anyway it’s been a very long time since i finish my Diploma. I’ve been through a lot lately, after when i finish my Level 1 in automotive course i found out that the world are quite not what I expected, well what I’m trying to say is we got to make the 1st step if we really wanna achieve something.

Let’s start from my 1st day I staying alone at my rental room, a day before my class start. At that time I was thinking ” this is my home for now, a home to a place that I not familiar with ” for that time i was a bit worried, cause the place that I stay is pretty far away from my college plus I didn’t have any transport of my own for that time. The only way I get to my college is by Bus, but you know… as usual everybody feels the same. At that time i start to become more independent, luckily i had a house mate their name is Fizal and Nazri they taught me which bus to take. But after knowing which bus take still make me thinking where do I have to press the buzzer and stop… To tell the truth I never take any bus before alone when in home town at Kuantan cos I use to be fetch by my family, friends, and drive alone. So I only start to take bus when studying at Puchong haha… it’s actually quite wired sitting next to a stranger but the most interesting part is well you know like every guys instinct when a pretty girl walk to the bus and sit next to you if you’re lucky or just walk through your seat hehe… hmm then… BUT that’s a different story haha… We are getting out of the topic…??

Anyhow I can consider a lucky guy why lucky?? Cos Thanks to my parents I have the chance to study my own courses. And I have some of my friend that they dun even get to choose their own courses or some even had poor family back ground so needed to start work after SPM and can’t even go for further studies..

Then when start my 1st day in college I thought to my self, this is my second chance to pay attention in my studies.. If I still fail this like what I did in the Secondary school times then I’m really a no body just like another DUMB ass wondering around and not making his life better…  Well luckily every things when smoothly in my studies but that time my only problem is finding another place to rent cos the place that I’m staying is too far from my college. That time I feel like a refugee bagging and searching for a place to stay.. but Thanks to my brother’s wife brother which is my brother’s “Brother in law” get what I mean… Ok back to the story had a room and that place which also near my college.. immediately I move out and really thanks to Fizal and Nazri which is my room mate that been so kind and friendly for that time.. So I said thanks to them and took off to my hmm…. brother’s wife brother which is my brother’s “Brother in law” place..

So that time I was still in mid-term of Automotive Level 1 course then my college had a new format for the Diploma courses heard rumours that gonna rise the fees, then for us to stay in the old format we need enroll to take the Diploma earlier cos if follow the procedure we need to finish Automotive Level 2 1st only can take that course due to the topics that given in the Diploma courses are higher then Level 1 and 2 but… What the heck just take it only lah~~~ Followed my class mate haha like what they use to said ” I Jump You Jump ” then we all continue studies Level 1 and Diploma together… that time I was thinking what I got my self into cos the Diploma topics are lot complicated.. Again I really-really need to focus and will try my best to do better, well what do you know…. I never expected that I PASS…  from 58 students that take the Diploma with me only 2 included me is 3 out of 58 get the certificate!!! and I was so surprise.. all the hard work had pay off.

After that I have my own car to go to my college haha ya and those bus ride a long gone for that time… then I continue study Level 2 still that time we need to do our project car which is a MINI and Convert the engine to Proton 1.6 SOHC plus the lecturer want us to fit in on the rear!! not the front and for those sad and sweet moment days passing we already come to Level 3 there’s not much happen when in Level 3 though cos maybe all of us are getting mature planning what to do after graduate, and comes to Supervisory courses….. all of those times I already spend my time studying at Puchong for 2 and a half years but It feels like just a blink of an eye haha… well gonna Miss those days when in college a lot… then finally we all graduated.. I’m glad that I didn’t waste a cent my father spend for me in studies cos I had finished ALL my Automotive Courses, Supervisory and Diploma but those money for hanging out with friends not count lah haha (^_^) .. Then that’s when I realize don’t give up 1st when you are still in the way to succeed all you need is patients and confidence.. Now I plan to start work to gain some experience and use those earnings money to to do some small business most probably sell second hand cars with my Father or brother cos he also working the same business and if have the time most probably will go for further studies overseas to pursuit my Degree… well everone knows Car racing is my passion but sometimes you have to give up the thing you want the most to succeed… still when I get rich I can do Racing anytime… haha no worries..

And Thanks for reading my blog…

Jenson Wong

I know that I got "red green colour blind" that’s mean I can’t differentiate red and green colour… : ( ever since I go get my driving licence… But why? Sometimes I can contrast between the Red and Green just that when I go take the Colour Blind test I can’t see the Numbers.. sometimes I feel I can’t do the things that I like especially that day when I go take my AAM Racing Car Licence and I need to get Medical check-up 1st whether I Fit enough and yes I pass the Fitness test but…when it comes to Check my eye the Doctor take out a book that originally use to check colour blindness just take exactly same with does that use to check our eye when we go and get the Driving licence the colour with a lots of dots that 1 if you know what I mean. And at that moment when the Doctor take I the book and ask me to said the Numbers out…at 1st page is ok because I saw that number clearly but when it comes to second page there’s silent…the Doctor, my parents and the nurse just stare at me, the Truth is I really can’t see any number on the second page and another and another until it comes to the page that I "red green colour blindness" can see and if no colour blind then can’t see those number, I said I can see this pages number then the Doctor just stop the Test and told my parents that I got "red green colour blindness" and I can’t take on some Career such as an Electrician, Air Pilot or maybe a Racing Car Driver and I’m worried that I even got Problem now in my Studies in Automotive because cars sometimes also involve in electronic… : ( I can’t believe that this could happen to me on the day I go Get my AAM Racing Car Licence….until now I still worry that I couldn’t pass… But WHY!!!! Becoming a Racing Car Driver is my dream ever since I was a kid and my Dad who is the 1 that taught me how to Race… Now I got second chance to take the Racing Licence test but it’s up to AAM committee to decide whether I get that Racing Licence…haih..so until now I still wouldn’t give up to achieve my ambition… :"-( anyway wish me luck and thanks for reding it I just want to share my story..to all of you so that all of you will take care of your own health.. so Take Care…and I would like to hear from you if you also have the same problem that i have…

I can’t stand it anymore, all of the lies that people use to said…"don’t worried is OK"…actually what’s ok have they been in the situation that what I have been through what I have done and how’s my life…sometime they said they know me well FXXK YOU…you don’t know me at all, I fedup with all of the thing that I have done for them but they make me act like a FOOL use me as a joke didn’t Respect me…why is this world like this no matter how good you treat them they just didn’t appreciated it…I just can’t stand them anymore, why Human are like this once I do something wrong they just kept mention the Mistake that I have done make me act like a Fool even though I was smilling but actually I’m just don’t want to make enemy if I was in my own place they will never have a chance to make a Fool out of me those Morons will know someday they will regret and they will feel sorry for what they have done…now I just need to carry on with this now still have 2 more years to go so now I just have to carry on with this life these Stupid way of life and I’m willing to change all this…well that’s it I have finally said it out..haih….but for sure I will never let it happen again I will change all this once and for all…

This year is my worst year ever, i have Never feel so bad luck before in my life at First in February I go to work while waiting for my SPM result, the second Boss in the shop which all of my friend also work with me gave him a Nick name which is "BIG HEAD POP" because his head is quite BIG likes to scold us when ever we do wrong all right he just yell at us.. but then few days after my SPM result came out my fravourite Dog name Blackie had died for no reason on 30 of March… haih.. so i just don’t want to think about it already and i went to KL to find my college to study there after i done my enrolment and on the way coming back to Kuantan My fravourite car which is my BMW crash i just don’t understand why all the things that i like just gone like that…!!!! haih….then now while i’m studying in KL my Handphone damage so i borrow it from my Mum after few days later i lost it in a BUS!!! i tell my self i wouldn’t let this happen to me again in the future i hope my luck will be better before my exam on Dec but now what i’m going to do is study hard and not let anything stand on way….