Thread: Fuel pump ?

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DONT run it dry for more than a few seconds!!! Most electric vane pumps are
cooled by the fuel flow and dont like pumping air.

You can wire in a neat fuel pump shutoff using a 96-2000 chevy vortec 5.7 truck oil pressure switch...it has a circuit that opens when the oil pressure dies. If you wire a relay coil thru the switch, when the engine is off or the oil pressure dies, the fuel pump is shut off. You also need a hot feed on the start lead of your ignition switch to energize the pump when you are cranking.

Those were actually a pretty good street pump. I ran one years ago on my Ford powered Sprite and it never overpowered the Holley carb. As I recall it was something like 4-5 psi. I don't know if they are still being made or not, but haven't seen one in years. Nice nostalgia piece. Worst that can happen is it craps out after a while and then you have to deal with putting something else in it's place.

Don

Well sinse I don`t trust the one that is in there, this might be the time..

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.