High Pressure Fuel System

A fuel injected engine requires a high-pressure fuel system. No such thing in 1965. To further complicate things, the old mustang gas tank has no baffles, stalling out the engine at sharp turns, depriving the high pressure system of fuel!

The solution requires the installation of a Low Pressure (LP) pump, an LP filter, a High Pressure (HP) pump, an HP filter, and a header or slosh tank. The green slosh tank allows the HP pump a constant amount of gas despite the vehicle's acceleration.

The system works pretty simply: Fuel is sucked out of the tank (1) to the LP filter and the LP pump and then into the slosh tank. Then the HP pump (2)sucks fuel out of there (3) into the HP filter (4) and to the engine. The engine then returns unused fuel (via the fuel pressure regulator) back to the slosh tank (5) and into the gas tank (6).

I mounted all the pumps and filters in the space above the wheel axle. High pressure fuel hoses with special high pressure clamps must be used on the HP side. I used the old LP lines for the return side. I heard suggestions of drilling a hole in the sending unit for the return. Whatever. Just change out the gas tank drain plug for a brass fitting and connect it to the return line. It's a 1/2" fitting.

I used 3/8" steel brake line hoses up the car connecteing them via HP hoses and three (3) clamps it to the fuel rails, making sure of a tight seal...we'll see soon enough.