Standard or Deluxe?

Electronic fuel injection has different fuel delivery requirements than that of carbureted systems. The EFI uses high pressure to the injectors that will range from 35-65 psi typically, depending on the brand and power levels of the system. In the case of the Pro Flo 4, the tuning map for your combination will dictate either 43 or 58 psi fuel pressure. There are different ways of setting up the high-pressure system, and the Edelbrock installation instructions are very clear about the optional ways of doing this. Many installations will use either an in-tank pump and return system, which is preferred as the pump in immersed in the fuel and runs cooler and quieter than a frame mounted pump, which will also work.

For those who don’t wish to invest in a new tank with an internal pump or have to modify the tank for a return line plus the noise of an external pump, Edelbrock has a cool solution: the Universal EFI Fuel Sump kit. This is a self-contained pulse width modulated small fuel tank with an internal pump that can be mounted under the hood and is fed by the existing mechanical fuel pump or a low-pressure electric pump. In our case the F-100 has an aftermarket aluminum gas tank that was not set up for a return line. The truck has a small electric lowpressure pump mounted to the frame next to the tank that had served well for the carbureted motor.

The first thing is to find a suitable mounting location; in our case it fit perfectly to the back side of the core support on the passenger side and only required making a bracket to mount it to the existing horn mounting hole (we relocated the horn). With the bracket made up, we mounted the sump, ran the power lead to the output from the ECU and installed the fuel lines and supplied filter. There is also a fitting for a sump vent, and this is critical to run back to your fuel tank vent so that you don’t have harmful vapors venting under the hood, which could ignite a fire. Once we started the truck, we adjusted the built-in pressure regulator to the 43-psi requirement for our tuning map and we were ready to run. This is a great solution to complete the weekend install of the Pro Flo 4 EFI system and can also be used with most aftermarket EFI systems and will support up to 750 HP.

C To mount the fuel sump, I made this sheetmetal bracket that uses the horn mounting holes in the radiator support and welded nuts to the back side to mount the sump using the supplied bolts spacers and grommets. A little black paint finished it off.

B Included in the kit is the molded sump with internal high-pressure pump and pressure regulator installed, push-lock fittings and hose, rubber mounting grommets and bolts, the wiring harness, and a 13-micron fuel filter.

D The sump tucked in perfectly to the core support almost like it was designed just for the classic F-100. We ran the hoses and wiring, and the sump install was complete.

A The Edelbrock EFI Fuel Sump Universal Kit (Part #36031) comes complete in one box with no extra parts needed.