Thread: fuel pressure

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On a 1050, Holley recommends minumum 5 lbs, maximum 7.5 lbs.

I agree with Dave, 1/2" lines.

Dave, at times when i really get on it hard, it seems to
want to sputter some especially on a up hill grade.
rdobbs

Could the small fuel lines.....

Unless this is a 1000+ HP 468 then I doubt it is the fuel lines. Especially if you have a fuel pressure regulator near the carb. When I last looked into this I discovered that the pressure drop in a 3/8 line feeding my 502 at full theoretical flow is quite small. Less than 1 psi over 8 feet. So if you have say a 12 psi pump at the trunk the regulator sees at least 11 psi at full flow and chops that to 5-7 psi. 1/2 line makes little difference.


Now if you have mega power your flow requirements increase and there will start to be an impact ............

Kitz

Originally Posted by kitz

Unless this is a 1000+ HP 468 then I doubt it is the fuel lines. Especially if you have a fuel pressure regulator near the carb. When I last looked into this I discovered that the pressure drop in a 3/8 line feeding my 502 at full theoretical flow is quite small. Less than 1 psi over 8 feet. So if you have say a 12 psi pump at the trunk the regulator sees at least 11 psi at full flow and chops that to 5-7 psi. 1/2 line makes little difference.


Now if you have mega power your flow requirements increase and there will start to be an impact ............

Kitz

Kitz, we can always count on you for the No-Bull scientific answer. Thank you.