Stock fuel pressure readings, before re-wire.

[TSIAWDTalon]

I installed a fuel pressure gauge outside of the car, mounted on the hood. Stock fuel pump (I think) it read 50+ at wot. I thought that without a re-wire you should lose voltage, therfore losing pressure. Or is that just with an aftermarket fuel pump? If I don't need to re-wire, that would just be one less thing to worry about. Any suggestions?

 

[Tevenor]

You don't rewire the fuel pump for pressure, you rewire the fuel pump for volume. The pressure is dictated by the Fuel Pressure Regulator. and hence 50+ is a good reading depending on your boost and the fact that the stock 1G Fuel Pressure is 36psi.

 

[TSIAWDTalon]

Sorry, I got in a hurry at work and did'nt give enough info. I am running 10 psi right now, cause of a slipping clutch. I have the pressure gauge installed in the fuel line before the rail. I have all the free mods, sans re-wire.

 

[jw]

What is your base fuel pressure? Remove the vacuum hose from the FPR at idle and look at the gauge.

 

[jsigone]

I got a 255fp in my car right now and my base is at 39, is it safe for me to rewire without over running the FPR? I just installed a B16G and I want the extra fuel for safety. I'm running 15psi on the stock injectors right now and EGTs are in the mid 800*C.