spoonman

hey, how is everyone? lol im new to the homemade scene trying to put together a decent kit for my sohc vtec. Just wondering if anyone can tell me the limits of boost on an hf manifold, im looking to run anywhere from 12-15 psi. any info. would be greatly appreciated, thanks

sikcrx89

they tend to go downhill around the 300hp mark.. ported and for a boost setup like yours for low psi and not max power you can get away with it

Smith-02

hf or std manifold i thought the std was larger ports and runners?

D15Bastard

std I do believe has the larger ports.

I used an hf on 15psi, porting one is a pain in the ***, but whatever.

hf ftw

SunshineSketches

i ran my vx manifold to 17psi daily with a 14b, then my wg actuator arm broke and the car saw 22 + psi and cracked a sleeve.

so now i'm going to port my manifold, rebuild my engine and go for it again.

spoonman

thanks alot guys, appreciate the info. greatly

rprznt

you wont break it with <20 psi so go for it

Skaterdudz02

HF=High Flow. It'll work. Power goal?

USS

I'm taking a an electric die grinder and a carbide bur to mine to port it out nicely. We'll see how it goes

http://www.grainger.com/Grainger/items/1Z356 is the bur I'm using.