[Bill Harris]

I'm completely fed up with pressure creep on my non-bypass fuel regulator when the engine is idling or at low RPM. I have tried several of the cheapo Holley regulators and a BG "2-Port Plus+" regulator (170025) and the pressure at my carb just blows right past the setpoint with any of them. The regulators are spotless. There are two inline filters, one before the pump and one just before the regulator. I have tried two pumps, a Mallory Comp 140 and an Aeromotive 11203, both have fixed output pressures around 12-15 psi at no/low flow. The carb is a Holley 780 (3310-1).

Whenever this thing is at an idle or driving around the pits the fuel pressure at the carb is whatever the pump pressure is, 12-15 psi, and the thing overfills the bowls and runs like crap. I have to keep turning the pump on and off to keep it from completely loading up.

If there is even a small flow of fuel the pressure settles down to the desired regulated pressure... such as if I open the fuel check valve just a little bit and dump the fuel into a jug (check valve on output side of reg). But as soon as the valve is shut, the pressure climbs right back to pump pressure. Regulation is fine going down the track at WOT.

Any ideas of what the hell is wrong with this thing and/or have any suggestions for the best dead-head regulator that might fix this problem?

Thanks