cnc nissan cylinder heads

[eccnc]

Originally Posted by godzilla_753

dunno if this is a pertinent question but I always wondered why the f20c's and evo 4g63's made so much power from factory, does it have to do with head flow as Ive been assuming? I know STOCK ENGINE (this means head as well), s2000s are putting down over 500 WHP, while EVO's are putting down over 300 wheel which puts em at close to 400 at the engine with stock turbos. Ive always thought SR's were a bit lackluster, at least in BPU form

the 4g63 is one of my fav 4 cyl engines and i have played with the heads alot on the flow bench, the stock head flows pretty well.

never messed with f20s thou