Thread: Ignition or fuel issue?

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Originally Posted by jerry clayton

A holley carb won't hold 7 psi pressure------electric pump? turn off to see if it will clear up---- sounds like you are flooding it out pretty bad

You guys kill me with your fuel pressure settings. No modern 4-bbl carburetor needs more than 5 psi to keep the bowl(s) full. You need VOLUME, by using large diameter lines (1/2" or larger), but you do not need high pressure. All that will do is to overpower the needle and seat and allow the pump to blow raw fuel into the intake manifold, creating a tuning nightmare for you. This is not EFI, where more pressure will support more horsepower.

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