Rb25et Head

[adamhr33]

i am in the process of building an rb30det,

i picked up a head and am unsure of what series it is.

how do i tell the difference?

and what is better?

[N1GTR]

Please check where you are starting a thread next time you start one.

Moved.

[Crans]

The heads are the same apart from the following.

1) This is more to do with the electrics that connect to the head. S1 uses an igniter S1.5 and S2 coil packs contain the ignitors.

2) Late model Series 2 heads used the r34 intake cam and CAS <- Correct me if i am wrong

The may be more

[The Mafia]

do you have a year when they started using R34 intake and CAS?

[Crans]

It was the last run of cars before r34 production started

[relic21]

yeh it was roughly ?/8/07 onwards.. they are easily to pick as the crank angle sensor is a black plastic and not the silver aluminium of the earlier models.. its meant to have a r34 exhaust cam not the inlet .. which has a smaller duration and higher lift.. but when i had my head completely dissembled the lobes measured exactly the same and they were both smaller than the lobes on the gtr head, so i would guess that the different cam is just an incorrect assumption based on the fact the cas has the 34 style join to the cam.

hope that helps

Jarrod

[PM-R33]

I think you mean 97

[jarrod83]

haha yeh 97 onwards .. accidently posted from my friends account to