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Old 08-03-2020, 11:22 PM
bobcowan bobcowan is offline
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Location: Colorado Springs, CO
Cobra Make, Engine: Backdraft, supercharged Coyote
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Do not confuse volume with pressure. Volume is dependent on the fuel pump and lines. Pressure is dependent on the the pressure regulator.

Carburetors generally need about 5-7 PSI. Webers generally need about 3 psi. And EFI generally needs about 55-60 psi.

A 427 needs a reasonable flow, like 255 lph or so. Racing at 7,000 rpm will need a bit more. FI will also need a bit more. Doesn't matter if it has 1 carb or 4, it needs about that much fuel. If you're planning on e-85, it will need about 25% more than that. There are a number of web sites available that will help you calculate the fuel requirements.
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