[citr0]

What would it take to get the 3.4l OHV to 300HP at the crank ( or close ) with boost , and last ?

Are the aftermarket there to do this ?

[ForcedFirebird]

About 20psi and depends on what vehicle you have, there are a few kits out there, but most of us build them ourselves.

[citr0]

its for a Fiero.. oh, no dont run ;P

thanks for fast awnser!

I have a turbokit, with intercooler ofcourse
but what must be done to the motor ?

[SappySE107]

it doesn't take 20psi for 300 chp. 8 psi has done that before. It depends on what else you do and what turbo you run for an exact amount of boost.

[SappySE107]

oh, 3.4 iron head or aluminum? iron head. yeah probably 20psi. haha.

[citr0]

hmmm, 20 psi is alot.
i know that there is people got 204 whp ( 230 crank hp ) on a 3.4l N/A. how hard is it to push it to lets say 270-280( crank hp ) then ?

and yeah, we are driving 95 and 98 octane fuel here in norway.

[SappySE107]

I haven't heard of 200 whp out of an NA iron head but I don't really follow fieros or s-10s or camaros.

[ForcedFirebird]

I meant to say 12psi sorry.

Loner's car is about 300hp based on his times and he's got 6psi - but also a 3400/3500 hybrid.

If the car doesn't run now, your best bet is to see if you can find a used 3400 and put that in. Your tubo kit will take little modification to work on the iron headed motor

[34blazer]

do this to the irons to even think about upper 200hp range
with boost of course

[ForcedFirebird]

Originally Posted by 34blazer

do this to the irons to even think about upper 200hp range
with boost of course

You can get 200hp with boost without porting. There are 14sec 3.4-powered fbods under boost with no porting, and you need at least 300hp to make a 14 flat in one.