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Old 10-25-2009, 21:23   #1 (permalink)
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confused Electric Fuel Pump Recommendations

i recently bought a Holley "blue" 110gph @ 14 psi electric fuel pump and it came with a standard regulator that can lower it to 88gph @ 9 psi. My carb is a Holley 750 CFM double pumper #4779-S.

I am wondering if this is too powerful of a pump for this engine (which is dynod at 500), or if the lowest setting on the regulator will work just fine. if not, what should i do?

a friend of mine said i could get a bypass regulator and run a return line back to the tank, only problem is my 67's tank doesn’t have a return feed. That leads to my next question on rather to add a return to the existing tank or get a fuel cell.

any tips would be greatly appreciated. i'm trying to do this all myself and not have to pay someone a ridiculous amount to do it for me. thanks a lot.
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Old 10-30-2009, 16:27   #2 (permalink)
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Re: Electric Fuel Pump Recommendations

The pump is not too big, if anything, just big enough for 500hp. And just set the fuel pressure where you want it, which will be around the 5-6 psi mark, just get a gauge plumbed in to see the pressure.
I use the Mallory 140 on my 408 which has 500-600HP? and also use the dead head setup with no return line to my carby. I run 6 psi and all good.
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