Manifold

[BIGale]

Hey to all, I am new on here and fairly new to the rb motors; I am starting to build my 30/25, and I was wondering how much power can the std rb25 exhaust maifold flow? I wil be running a gt3540 turbo, and a haltec ecu.

Any input will be great

[TiTAN]

it starts to become a restriction around the 300rwkw mark a 3540 is a 350-380kw turbo and should really use an aftermarket manifold.

why the 25/30 if you have a GTR? why not use the RB26 head from it and use 2860-5 turbos instead?

[R31Nismoid]

+1

[BIGale]

I all ready had the 25 head from a 33 s1 and I bought a rb30 whole motor for $100...go ebay:P I want to run the std manifold due to SAPOL giving me a nice defect label if I dont run factory manifolds.

I dont want to run because the 30/25 has more tourque, and less strain overall on the motor. aiming for 280-300 at the wheels on safe tune, and very safe boost as it is my only car.

[TiTAN]

2630 with -5 turbos can look completely stock and put 400kw to the ground.

[jangles]

I all ready had the 25 head from a 33 s1 and I bought a rb30 whole motor for $100...go ebay:P I want to run the std manifold due to SAPOL giving me a nice defect label if I dont run factory manifolds.

I dont want to run because the 30/25 has more tourque, and less strain overall on the motor. aiming for 280-300 at the wheels on safe tune, and very safe boost as it is my only car.

if youre only aiming for that why not just leave the RB26 in it?

and what the other guys are saying also, a 25 head is a backwards step for a GTR and seems pointless

Edited January 3, 2011 by jangles

[BIGale]

I have no choice now, I knew the RB26 was getting tired but she droped a valve today when giving her some:( spewing; I guess the build will deffs speed up now.