Twin T51R SPL RB26DETT
RB26DETT. An engine of much myth. We are going to try and set out some truths. Remember to trust nothing you read on the internet, or is it trust everything that you read on the internet?
Rated at 280 hp stock from 1989-2002
Iron block Aluminum head
2568cc of displacement
86mm bore x 73.7mm stroke Twin turbo
Individual throttle bodies - thats six in groups of 2
Coil on plug ignition
Stock R32 Dyno chart
R34 - Nissan Skyline GT-R
Top of the motor
Aluminum.Black on R32/R33. Red on R34. Nur on the Nurs. Two
breathers located at the back of the plenum. Drivers side goes to PCV valve. There is a crossover tube. Left side goes to the inlet side of the rear turbo.
Spark plug cover
We like to leave them off to keep the coils cooler. The engine looks
more finished with the spark plug cover. You know the piece. Says RB26DETT on it. Front cover
The piece that says RB26. Covers the timing belt. Not recommended to leave off. Aluminum on R32/R33. Plastic on R34.
R32/R33 located at the back of the spark plug cover. Igniters are build into the coils in the R34.
Coil on plug. R32/R33 are the same.
The front two coils on a early 90's Infiniti Q45 are the same
R34s have the igniter built in.
RB26 coils or coil packs
PFR6A-11 are the stock plugs
NGK are the best plugs
BCPR7EIX are one heat range cooler and iridium
Intake 8.58 240 duration 113 deg Lobe Center -R34N1 117 deg Lobe Center
Exhaust 8.28 236 duration 125 deg Lobe Center-R33N1 120 deg Lobe Center - R34N1 121 deg
Intake 34.5 mm
Exhaust 30 mm(sodium filled)
4 valves per cylinder
Cam on bucket
Shim under bucket adjustment
RB26 combustion chamber
6 individual throttle bodies. Cars have done over 1000 whp on stock throttle bodies.
Vacuum/boost and water pass though the balance tube
Stock manifold on left, Modified N1 on the right
Exhaust elbow/Outlet pipe
Bottom end of the motor
86mm. Stock pistons are oil cooled.
1.5 mm top ring, 1.5 mm 2nd ring.
N1 has 1.2 mm top and 2nd ring
121.5mm center to center.
RB28's have 119.5 c-c except in a GT block(RRR)
Crankshaft Main cap/girdle
Seven main bearings.
#4 being the center main bearing and containing the thrust bearing.
The other six main bearings are all the same construction.
Bottom end of the RB26 showing the main girdle
Contains the front differential
The front differental is on the right side of this picture
05U on the side. A standard block.
24U on the side. An N1 block
RRR on the side .GT Block . That one is special
Far pump is N1, close is normal. Notice the N1 backing plate
Engine Control Unit
Divided twin turbo pipe
Rear inlet piping collapses under boost.Replacing it with hardpipe is recommended.
Stock intercooler will provide better response to approximately 600 wheel horsepower.
Buy RB26 , RB26DETT parts here. Gasket kits , water pumps , timing belts , camshafts. New OEM, and aftermarket parts. .