Quote:
Originally Posted by magwakeenercew2jh
I'm running my stock tank in the cab and an electric fuel pump set up along the frame rail, into a filter,
then into an adjustable fuel pressure regulator... and then into the carb.
Seems I made a quick choice on the fuel pump. The one I initially installed works....
But it only pumps 4.5 or 5.5 psi....
Yeah, it works. But I'd like to crank it up a bit.
I'm looking for one that pumps about 12 or 15 psi (or so) so I can throttle it back with the regulator
when I find the "sweet spot".
Any options? Or, "stay away froms"?
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If your engine has a Holley carb, it wants to see between 5.5 and 6.5 PSI...not more. A quadrajet can run on pressures a bit lower, but not below 4 PSI. On any of them pressures above 6.5 psi causes flooding and it is unlikely your engine will run at all. Most in-line pumps use an internal regulator. My Holley black pump is internally regulated to exactly 6 PSI and flows a maximum of 150 gallons per hour. With a flow volume that high, that pump never starves the carb on my motor and there is no fluctuation in pressure when going from idle to full throttle. You can get the same results with an external regulator if the flow volume of the pump is high but that just adds two more connectors that can leak. Why bother?