Nissan RB Engine

[sakuraguy]

Nissan RB Engine


The RB engine is a 2.0L to 3.0L straight-6 piston engine from Nissan.

It has an aluminum head with both SOHC/DOHC versions, with the SOHC versions having 2 valves per cylinder and the DOHC versions having 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 engines RB20ET & RB30ET), 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. In common with all Nissan engines, D indicates DOHC, E indicates EFI, T indicates Turbo.

From August 1993 RB engines produced also featured NVCS (Nissan Variable Cam System) for the intake cam.

From 1998 the RB25DE/T series was released with a 'NEO' head, which enabled the engine to be classed as an 'LEV' (Low Emission Vehicle). The 'NEO' head improved the torque and power of all engines in which it featured, although the RB26DETT still only produced 280 PS (206kW) according to Nissan factory specifications. In reality, it developed more than this due to all main Japanese car manufacturers having to adhere with a 'gentlemen's agreement', which specifies that a manufactured vehicle should not be advertised with an engine exceeding 206 kW.

The 'RB' name stands for 'Race Bred'. :regular_smile:

 

[sakuraguy]

RB20

There were four 2.0L RB20 engines produced:

RB20E - single-cam (130hp)
RB20ET - single-cam turbocharged (167hp)
RB20DE - twin-cam (155hp)
RB20DET - twin-cam turbocharged (215hp)
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 (Electronic Combustion Control System). The non-turbo models were also fitted to various Holdens sold in New Zealand (RB20E). The Z31 200ZR was fitted with an intercooled RB20DET.

Laurels, R32 Skyline and Cefiros used the second (1988-1993) series RB20E/DE/DET. This series of engine has an improved head design over the previous version, and used the new ECCS injection system. These later motors are known as 'Silver Top' engines.

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 as a 'LEV' (Low Emission Vehicle) engine.

 

[sakuraguy]

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. 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 carburreted set-up. The standard single cam form produced 141 PS @ 5000 rpm and 20.1 kgf·m of torque @ 4,400 rpm.

RB25

1993 RB25DET with VCTThe 2.5L RB25 engine was produced in three forms:

RB25DE - twin-cam (190 to 200hp)
RB25DET - twin-cam turbo (245 to 250hp)
NEO RB25DET - twin-cam turbo (280hp)
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. 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.

 

[sakuraguy]

RB26DETT
The first 2.6L RB26DETT featured twin turbochargers and produced 280PS (206kW) @ 6800 rpm and 260ft/lb (353Nm) @ 4400 rpm. The last series of the RB26DETT produced 280PS (206kW) @ 6800 rpm and 289ft/lb (392Nm) @ 4400 rpm. However, several stock and unmodified engines have been dyno tested and reported to obtain nearer the 320hp mark. It is widely renowned for its strength and extreme power potential. It is not uncommon for 600hp to be achieved on the standard bottom end. With extreme modification & strengthened internals, the block itself has been pushed much higher, over 1MW has been produced. [2]

It 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 ZZII

RB26DETT Z2
This is the engine used in the Nissan Skyline Z-Tune. It is basically the RB26 block, modified with Nismo parts, and stroked to 2.8L. The end result was the RB26 Z2, which puts out 500 hp and 550 Nm of torque. They originally aimed for 630hp, but the engine had to be de-tuned after problems were encountered with high emission values.

 

[sakuraguy]

RB30

Three models of 3.0L RB30 were produced:

RB30S - carburetted single-cam
RB30E - injected single-cam (114kW) [3]
RB30ET - injected single-cam turbo
The motor is a cast iron block with an alloy head, and a SOHC at 86x86. This motor was produced because the Holden 202 (3.3L) 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. teamed up with GM to build their biggest displacement RB, the 3-litre RB30E. The RB30ET was only found in the VL Commodore. The RB30S was found in South African R31 Skylines. The RB30E was found in R31 Skylines and VL Commodores.

RB30DE
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.

RB30DET
RB30DET - R31 RB30E block, R32 RB25DE head.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 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 also used, however an external oil feed must be fabricated for the variable cam timing on the RB25DET which further compicates things.

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 ~7500RPM. 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 a 86mm bore x 86mm stroke. It is available as an assembled short block, containing billet chro-mo crank, billet chro-mo H-beam rods, forged pistons, and costs ¥1 500,000.

 

[sakuraguy]

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 the engine is bored to 2771 cm³ which gives out 450 PS (331 kW) at 6,800 rpm and 47.8 kgf·m (469 Nm or 347 lb/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 were not offered for the RB26DETT.

 

[sakuraguy]

..:: End ::..​

 

[pudin74]

RB26DETT Interference or Non-interference engine?

 

[sakuraguy]

wat interference? ..

 

[DarkChild]

You should ad some info on blocks as well...
Like the standard RB26 (05U) block , the N1 (24U) block and the GT (RRR) block...

 

[pudin74]

wat interference? ..

There are two types of engines that use timing belts. They are described as: "Interference Engines" and "Non-interference Engines" The difference lies in the proximity between the valves and the pistons. On an interference engine, if the timing belt slips even one notch, the piston can crash into an open valve causing serious engine damage by bending valves and breaking pistons. Non-interference engines will usually not self destruct, but in either case if the belt fails, the engine will immediately shut down leaving you stranded. :shades_smile:

Well I just found out that all RBs are interference engine..sigh.. Unlike my other engines 4AGE and 4G92 mivec.

 

[sakuraguy]

ic... good info, but who cares interference or not.. ;) .. RB is the king!

 

[gti88]

hey dude,

try to look up GT500 RB26.

 

[sakuraguy]

Isnt tat easy to get .. but i do my best :)