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HQ_SS_Andy Offline
#1 Posted : Friday, 12 November 2021 12:16:06 PM(UTC)
HQ_SS_Andy

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I have an HQ with a 304 engine, Holley carburetor and electric fuel pump.
In general, should electric fuel pumps have a pressure regulator between it and the carburetor ?
I don't have a separate regulator, and I don't think the pump has a built in one. I've always wondered is I should have one.

The fuel pump I have is this one:
https://fuelflow2020.nz/?page_id=167

Carburetor is 4165 type (List =6498)

Tks&Rgds.
HK1837 Offline
#2 Posted : Friday, 12 November 2021 12:53:43 PM(UTC)
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Have a look on Holley’s site, they should have the recommended fuel pressures for their different carbs. If you can’t find it I’ll see if I can later.
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HK1837 Offline
#3 Posted : Friday, 12 November 2021 6:11:47 PM(UTC)
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Have a watch and read. Might help:

https://www.holley.com/b...or_carbureted_vehicles/

This Holley pdf suggests 5-7psi, with minimum of 4psi at engine redline and 7psi at idle. Very different specs to your fuel pump!

https://documents.holley.com/199r7923-2rev2.pdf

I think that pdf is applicable to your Holley, I read a 6498 as a 650cfm spreadbore double pumper.
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If we all had the same (good) taste, who would buy all the Fords?
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