Quote:

I have a return line on it from the reg back to the pickup. The pickup is an aftermarket 1/2"type with about a 3/16" return line in it also. There isn't a sock on the pickup, i would like to put the brass type strainer on but can't seem to source one here that's 1/2".



Then I would say your experiencing cavation, which means not enough free flow into the pump, I'll bet ya.

Gasoline is very hard to suck, A hi performance pump needs to be supplied with lot's of gasoline so it don't cavatate.