Building 2 Rb25 Motors

[MJTru]

Ok mates

So I'm building my rb25det motor, and I'm planning on pushing it to the limit.

I'm building 2 motors one with a stock head and one with a built head.

I'm using 87mm cp pistons and eagle rods in both motors. The comp is 8.5:1 for both motors,

The one with the built head is a 240sx and the one with the stock head is an r33 skyline.

Now the skyline has the following work done.

1. ACL main and rod bearings

2. N1 oil and water pump

3. ARP main and head studs

4. Crank collar and block to head restrictor ( one in the middle, lash lifters)

5. AMS GT950R turbo And 6boost manifold with 44mm tial waste gate.

6. Custom intake with top mount fuel rail and Sard 800cc injectors

7. Split fire coils, with HKS twin power.

8. MLS head gasket Cosmetic 1.2mm

9. Full exhaust with FMIC

10. External fuel pump and regulator

11. Power fc

Ross crank pulley

Clutch master twin plate aluminum fly wheel clutch kit.

Now that's the skyline. From what I've learnt from SAU I have tried and applied to this build.

Is there any other things I should do for this build, I'm planning on 500hp.

For the 240sx all of the above is basically the same just the head is built and the turbo is a GT42R with 60mm Tial waste gate. Planning on 800hp.

The oil pump in the 240sx is a greedy unit, I'm using a high volume sump, Haltech PS2000, Other than that the rest is the same.

I have left the head detail's out, But it will have valves and angle job, guides, cams , port and polished.

Please feel free to make a suggestion thanks in advance. the pics are of the old motor in the r33 skyline

Edited February 2, 2011 by MJTru

[Killer4Ever]

well done mate

with Skyline you can go 600+ easily, but don't rev above 8200 rpm

for the 240sx you need to have 1000cc injectors

please mention what fuel going to be tuned with to get best expectations from us

[Guilt-Toy]

WTF 8200rpm within n1 pump and stock head ?

[R31Nismoid]

My limiter is 8200 with a N1 pump, cars run fine for 3 yrs

[Adriano]

My theory is that you are better having a high limit with a n1, as you are less likely to hit it, which i believe is what kills them.

[MJTru]

From what i have heard the N1 oil pump for rb25 is good for 7500rpms mate. But in my last motor i sometimes ran it to 9000 and it lived. After taking the motor apart the pump looked fine, but i know at those rpms for a long time would kill it. The skyline motor failed do to detination. I ran about 26 psi on pump gas. All the signs are there. But this time will be different. 110+ octain for shore mate. I also am adding the oil drain kit from spoolimport to both heads, on both cars.

Does anyone know of some good 1000cc injector, with all info (ms accross different voltage points) Using Haltech ps2000.

thanks

[MJTru]

Has anyone used the spoolimport oil drain kit for the rb25det and 26 heads.????

Will this control my oil problem. When i push the car hard the oil would fill up the catch can, at about 26 psi, for long high rpms. What i have done is put the oil restrictor in the block only in the middle cause i still have the lash lifter set up, and the spool oil drain kit.

Edited February 4, 2011 by MJTru