PorkRoll

iTrader: (7)

How much does each pound of boost translate into, speaking in terms of H.P. For example a stock EVO@ 19psi Vs. Stock EVO@ 21 psi....both tunned.

DanJ

iTrader: (2)

I think the basic rule of thumb is for each PSI is 10hp. But it all depends because 1psi on a huge turbo moves a lot more air then 1psi then a small turbo.

3volution8

yea 10 hp is about what ive heard to.

m4tt VIII

iTrader: (32)

+1 in the case of stock turbo

PorkRoll

iTrader: (7)

Yea i thought 1 psi would equate into more of a gain in power on a larger turbo.

Chemwarrior

iTrader: (14)

I have always wondered this and now I know. Knowing is half the battle.

PorkRoll

iTrader: (7)

I always wanted to know, i tried searching today but to no avail.

lancerMRguy

iTrader: (2)

I have wondered this as well, and was always told 10hp to 1psi on the average.

mack4477

iTrader: (5)

GO JOE!!

bdturbo

Great....now I know. I have always wondered.

Ralph

iTrader: (19)

As you go higher in boost, you'll no longer be gaining as much power per psi.

19 to 21 may be huge..

26 to 28 won't be as much...

Plus you should probably re-tune to get the most out of your increase in boost. See: Different load cells/different timing and AFRs

V8eatr

I recently upped my psi to 21psi and got it tuned. It went from 296whp to 325whp. I might have a leak somewhere or a bad pvc system so it could possibly be more. Ill find out thursday.