imported_plzbeleiveit

I got a fuel pressure regulator and a fuel pressure gauge was wondering what the best psi is for best preformance.

chris_si98

stock pressure is best

i think its 38 or 44 psi, I forget to be honest

imported_plzbeleiveit

I currently at 35 ish PSI at idle.

bbarbulo

iTrader: (2)

stock is 38 (idle) and 42 (WOT) PSI.

imported_plzbeleiveit

So i should run that psi, or higher.

bbarbulo

iTrader: (2)

only a dyno and a wideband can tell you for sure.

zeeman

iTrader: (1)

a higher than stock fuel pressure puts additional strain on a stock fuel pump. Besides, stock injectors run best on the stock fuel pressure

imported_plzbeleiveit

zeeman im calling tomorrow to get dohc vtec valave cover and throttle body.

zeeman

iTrader: (1)

k mang...wanna meet up at the same place?

imported_plzbeleiveit

Yea. cool

VTEC_Thunder

LOL.

My turbo cavalier runs at 20-25psi fuel pressure at idle (the FMU bumps it up high when boost hits).

Any higher and she runs too rich and actually stalls, puffing black-rich smoke.

Couple times the fuel system lost it's prime and the engine kept running(at idle) at 0 (ZERO) fuel pressure!!!

Was weird. Soon as I tried to rev it though, it stalled.

chris_si98

wtf..

VTEC_Thunder

My words exactly...

I don't know how a fuel injected engine runs on zero psi fuel pressure...

Eurotuner00

u serious my psi at idle is liek 25-28psi is that wrong or osmething shoudl i crank up the psi or leave it alone

chris_si98

uh... yea