Thread: Fuel pump ?

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Just be aware that excessive pressure into the fuel bowl will overpower the needle and seat and blow raw fuel into the intake manifold. This will generate tuning nightmares that will make you crazy.

Carter AFB, Edelbrock Performer and Quadrajet will tolerate a max of about 5 1/2 psi. Holleys will tolerate a max of about 6 1/2 psi. Install a quality regulator and adjust accordingly.

You need to monitor the pressure under driving conditions, so tee off at the fuel inlet at the carb bowl and run a piece of nylon or copper tubing back to the firewall, then up past the hood lip to the cowl in front of the windshield. Temporarily (with tie-wraps or racer tape or whatever) mount a 0-15 psi gauge so you can see it through the windshield while driving. If you don't do this, you'll never know whether you have the optimum pressure going into the bowl or not.