musclekilla

i was just wondering how much boost the stock turbo on a 05 evo VII will handle wothout damaging turbo....

BoostEEd

iTrader: (19)

without some other mods it will handle far more than your fuel system will be able to keep up with.

Most are dialing them in around 22-23psi, but I find that a bit high for stock fuel pump.

musclekilla

well with higher octane ive gotten it up to 25 easily and make a ton of diffrence and all i got is a intake by injen..no tune or nothin

BoostEEd

iTrader: (19)

Yes you can get it up higher, but when I say your fuel system may not keep up I mean you may be running leaner than you would like.

I bring this up because I run a tune and have recently done some logging and have found that my fuel system can only keep me at the AFRs I want it at if I run 19psi or lower. So I am putting in a new fuel pump. But even if you can run the AFR you want at 25 PSI its not recomended on the stock system.

althemean

iTrader: (5)

I suggest doing a search as this topic has been covered numerous times and the info is at your finger tips.

BTW...25psi is not something that is recommended, even with a tune. You will find you are blowing nothing but hot air increasing your chance for detonation.

xxxevo8xxx

iTrader: (3)

I run 25-26 psi on my car. I have a stock pump. No problems, but i also have a custom flash from Works

BoostEEd

iTrader: (19)

have you ever logged your AFRs?