Fuel demand

71scamp78 said

Ok really wanting to run a mechanical pump. Question is what one will be enough. I'm coverting to a 3/8 sending unit and will have around 615 hp in my 512 cubic inch street car. Probably won't see full throttle pulls longer than 15 seconds. Can a stock pump handle it or would I need say a Carter, Hollet or a Eddy pump. No one has the Eddy pump which I like because it has 3/8 inlets and outlets.

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For what you are doing, I wouldn’t do it. I don’t have the guts.

I wouldn’t even use a mechanical pump for that. I’d find a 140 gph (or bigger) electric pump and run a bypass regulator for what you are doing.

It’s a PITA because you have to run the return line (both the return and the fuel line should be #8 and #10 would work too) and you have to run a loss of oil pressure kill switch so if you get into a crash and the engine shuts off the pump stops with it. You don’t want to be in a crash and have the pump (especially a big pump like that) blowing fuel all over hot engine parts. You’d be getting toasty right quick.