D16Y8@7 psi, 12:1 FMU, MSD Inline pump, 270 cc injectors. Right now my A/F ratio is like 14-15 under boost. How can I bring it down to like 12-13? I assume by dropping my idle fuel pressure. Am I correct?

 

14:1 is way lean under boost. what are you using to measure your a/f ratios. lowering fuel pressure would definitely not be good. by lowering your pressure it would be even leaner. Less base pressure = less total pressure under boost therefore leaner. more pressure more fuel you get the point.

if the car is running good and you are going of your a/f autometer then you want to see green on the guage. i see it hard for your car to be leaning out that bad unless something is not hooked up properly.


HTH
chris


[Modified by g2turbo, 2:11 PM 12/31/2002]

 

My autometer POS shows green, but my apexi TT's a/f gauge shows 14-15. Should I increase fuel pressure?

 

^

 

I heard that a/f guage isn't too accurate.

 

take it to a real a/f wide band lambda meter