I’m going to install a FiTech EFI system on my 1960 Chevy pickup with a mild 350 in it.
In the kit you get a very nice pump that will boost the fuel pressure to 58 psi to feed the efi unit.
Their instructions are to install it near the fuel tank and let it gravity feed fuel to it. Because of the location of my tank (under the bed)I can’t put it low enough for it to feed the pump.
I thought I would mount their pump in the engine compartment and just feed it with my stock mechanical fuel pump then their pump would supply the efi unit.
They said that won’t work because a mechanical pump only puts out around 15psi. Isn’t 15psi a lot more pressure than just gravity flow thru a 3/8 fitting from the tank?
Can anyone figure out why my plan would not work?

You should have plenty of room to mount a 2 or 3 gallon cell up front, fed by the mechanical pump.

They probably don't want a pressure feed to their unit because they are probably returning fuel to it.

This message has been edited. Last edited by: SP 124X, January 02, 2025 07:48 PM

Isn’t the floor of the cab below the bed floor

Can you mount pump under floor of cab and maybe even create sump off bottom of tank

If it was me, I would put an EFI pump in the tank.

^^^^^^ X2

What Markemark was pointing at. Critical these days to "know what's going on" rather than think you have a "feel" for it.

The issue you will have is the electric pump would not have any fuel available until the engine starts and the mechanical pump starts pumping.

I agree with others I would use a intank pump out of Camaro or Corvette, very popular swap. Or just mount the pump near the tank.

My friend recently did a fitech on a engine and had a lot of issues with the fuel regulator leaking and had a hard time getting any tech help for fitech. He had a aeromotive regulator laying around and it work fine.