For those of you guys that have a fuel pressure gauge running what are you pushing for PSI at idle and normal driving ? I am running 30 Psi and that seems low, although when I get under boost it climbs up to 50 to 55 PSI. I thought I should be running at about 45 PSI during normal driving.
Normal Fuel Pressure???
- Thread starter Hissssss
- Start date
39-40 psi is base fuel pressure, which is with 0 vacuum/0 boost. In vacuum (idle and cruising), fuel pressure will be lower since the fuel demand is also much lower. When you step on the throttle, vacuum will go to 0 (fuel pressure will then be 39-40 psi) and then the pressure will start to go up once you start making boost (usually goes up 1 psi for every 1 psi of boost). Of course, that depends on how your tune is set up since these cars dont have a fuel pressure regulator and everything is done through the tune. Hope that helps.
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