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Old 09-08-2017, 01:19 PM   #3
Charlie ny
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Join Date: May 2010
Posts: 3,019
Default Re: 2 1/2 psi fuel pressure

Phil,
Part of the answer is the number of times the pump has been rebuilt and by whom.
Bases and bowls from Holley, AC, B, and off shore bases and bowls get mixed. Then
the slotted type of arm vs the bushed type of arm adds to the challenge....it's all
good however once the needle settles on 2 1/4 to 2 3/4 psi.
Spring consistancy in my experience is vague, different number of coils, slightly different diameters, varying heights....etc etc.
Charlie ny
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