N1 Motor Specs

[XRB26X]

hey guys im thinking about buying a 32 GTR with a r33 N1 motor in it and im trying to find as much info and specs about the motor as possible. can anyone let me a hand any and all info would be great. was there ever a workshop manual made for the motor or just use the standard rb manual ?? also looking for compression test read outs that were just done on the car and want to know if there good ??

Comp Test Results ( psi )

DRY WET

Cylinder 1 130 Cylinder 1 150

2 120 2 150

3 120 3 145

4 125 4 140

5 130 5 140

6 125 6 140

i know from experience that the figures should be within 10-15 psi of each other. are these figures acceptable for a standard N1 motor ??

[MrStabby]

I have an N1 motor too, but haven't found good info about them. Take this all with a grain of salt - but its the only info I have for now.

- More finely balanced bottom end (but same crank and rods)

- Stronger, but still cast, pistons

- Stronger block (24U stamped, instead of O5U)

- High volume oil pump

- Updated water pump for high RPM use

- Different cam(s) - AFAIK the exhaust cam is longer duration, I think the lift is the same. Intake cam may be the same as non-N1.

Your compression test looks fine to me. AFAIK N1 run the same compression as other motors, and the difference in cams is small so you'd expect to see the same results as a non-N1 motor.

What turbos has it got? Did you verify its a N1 motor? If so, how?

[(OO)SKYLINE(OO)]

^^ Just to add to your list Adam:

The cylinder walls are thicker and water cooling channels are enhanced to increase flow.

The pistons have 1.2 mm (0.047 in) top rings and were balanced before assembly but otherwise very close to standard.

The connecting rods are also similar to standard but made from slightly stronger material and balanced.

Standard crankshaft is balanced to a higher level.

Higher flow exhaust manifolds and turbochargers were added for increased torque and slightly higher top-end power.

Turbine wheels on the N1 turbochargers are also made from steel for durability, rather than the lighter but weaker ceramic found on the standard turbine.