[Probird]

Originally Posted by Tom Vaught

Boys are you saying feed line or return line

This statement supports what I am saying about the return side:

"The return line must have limited or NO pressure in it. In most cases, the minimum return line size will match that of the supply line, but a larger return line is sometimes preferred."

The man has a -10 feed line. He has a -8 return. Opposite from the above recommendations.

Explain please

Tom Vaught

Tom- The way I understand it is he was asking about inceasing the size of the feed line to #12. He doesn't have a return line. He's using a bypass at the pump. I think the #10 feed line is plenty. I agree with what you are saying though if he was running a bypass type system.

Have you tried running it without a filter element installed? Maybe it is the restriction. Are you using any sharp 90's?
I think the way you are currently running it should work just fine. I'm running an almost identical system. #10 to A2000 pump with a bypass to fuel cell, #10 to big Holley regulator deadheaded and #6 lines to carb. This is running alky and it works fine for my car at 140 i the 1/4. I did have a similar problem and it turned out to be low fuel pressure. The regulator backed down to 3 1/2 lbs. Jacked it back up to where it should be and it quit laying over on the gear change. Are you sure your guage is correct? What is the pressure from the pump to the regulator? I'm running 24lbs. to the front. Maybe crank up the pressure from the pump to the regulator.