Can't get Fuel pressure above 5.5 psi

[FWB]

personally i stopped using holley pumps 10 years ago for the same reason you are experiencing. they have the consistency of a wet turd.....

have been using the mallory 140 gph with a regulator on 2, 4bbl's have it set at around 5.75 and no problems ever.

just sayin'

[Tommy]

As I mentioned earlier, another option is to replace the stock spring that controls the bypass valve in the pump with a stronger one of the same size. That will prevent the internal pressure regulator from opening so soon.