With a correctly rebuilt stock type mechanical pump, you will not generally need a regulator as a stock pump should put out like 4-5, and the pressure that actually gets to the needle and seats is usually less. I ran a pair of Holley-Webers for years without a regulator on a stock mechanical fuel pump. If you do decide to go electric, consider the Carter 4070. Low pressure, reliable design (originally designed for the military). Been on the market for decades. You need to use a fuel filter before the pump as the pump is cooled internally by the fuel so if no filter, gas tank junk jams them up and turns them into junk. Because they are cooled by the fuel, they are not known for over heating. Generally pretty quiet but use the carter quiet kit just to make sure. You might need a regulator but check the pressure. Also, and as above, use a carter pressure switch and a fuel pump relay set up. the business of wiring the pump directly through a switch under the dash board like we did as teenagers in the old days, should definitely stay in the old days.
Its a rotary vane design so if you wanted to install one for priming the mechanical pump, you can do that too, just use a relay. Just don't run both. The reason I say that is if you have a diaphragm failure in the mechanical pump, the electric will keep pushing and the fuel will just head into the oil pan via the ruptured diaphragm and be dangerous. So priming only with a relay, full time with a relay and pressure switch.
Last edited by Dragsix; 10/02/2020 8:37 PM.
