fuel pressure / rising reg

[teamwelfare]

Was wondering if anyone could tell me what the fuel pressure should be on my '11 pro twisted turbo? The fuel pressure gauge with the kit is tee-into return line out of rail into rising rate regulator, reads 38 psi @ idle. Does not seem to change when increase rpm / afr spikes high ( lean ) when WOT and stumbles at WOT. Seems like most issues I have with this kit may be fuel pressure related? Any explanation how the rising rate fuel pressure regulator works...i see the boost sense hose into it, does it increase fuel pressure as boost rises? Just mostly concerned with fuel pressure and if where the gauge is tee-in if it is sufficient for what you want to see on return side before regulator at idle. I see most numbers are 60 psi range stock? Is this also the proper place to check fuel pressure on these?

 

[GNDAN]

The air (Boost) pressure just acts on a diaphragm. As boost pressure increases the spring/boost pressure tries to hold the fuel back from going to the return line. In this picture to make it right for your situation the "Fuel Return" port would be coming from your fuel injector lines, and the "Carburetor" port would be going back to your fuel tank.

The way it sounds they are trying to bypass the stock regulator in the tank by T-ing into the return line and going back to the fuel tank some other way? This would work since the stock regulator is set at 60PSI IIRC and the regulator you are running would have to see 11PSI (Assuming 2:1 pressure increase) before you couldn't go any higher before the stock regulator started bypassing fuel again.

Hope this helps, Dan