I have a 130 gph Holley fuel pump, a 140 gph high flow fuel filter, and a regulator set at 6.8 psi at 1100 rpm. My question is: will the mechanical fuel pump increase its volume flow as the rpms go up? I ask this because I was testing my nitrous system. I activated the fuel solenoid and my psi went from 6.8 psi to 4 psi and the engine started to die. I am hoping that the fuel flow and psi is much greater at 4000-6000 rpms then it is at 1000 rpms. I would hate to have my nitrous activated at 4000+ rpms with a psi of 4. Thanks in advance for your help!
Daniel

You should probably look at your regulator as the bottleneck. It will regulate the pressure, but might not flow enough volume. A plugged up fuel filter can cause the same symptoms, but the pump should keep up with the engine's needs.

Dave

I removed my regulator upon someone's advice and gained a few hundred rpm, which was a flow problem.

Do you even need the regulator with that mechanical pump?

Sounds like the increased flow demand created when you opened the solenoid overwheled the flow capacity of the regulator. Not sure though whether your engine bogged because you starved it with low pressure or flooded it with a great fuel dump and no incresed air charge.

Looks like you beat me Gene, what I get for being verbose.

The instructions say that a regulator must be used. I engine started to die due to too much fuel, as the fuel solenoid was open along with the fuel flowing to the carb. I am more concerned with the fuel psi dropping so low. This of course is at 1000rpm, mabe the fuel flow is higher at 4000+ rpm, thus the psi won't drop as low.