It’s no secret that an electronic fuel injection conversion requires a series of fuel system upgrades—but a lot of folks overlook the need for a return line to send unused fuel back to the tank on a separate circuit. (This article explains the whole fuel return thing in more detail.)
That means you’ll probably need to add a return fitting to your fuel tank to allow the returned fuel to dump back in—not a big deal if you’re handy with a welder, but a very big deal if you don’t want to weld AND don’t have access to the backside of the fuel tank.
That’s why the EFI experts at FAST offer an ingenious solution with their EZ-EFI Return Line Fitting.
If you’ve ever used a rivet tool before, then you’re probably familiar with how this handy fitting works:
- Drill a 1/2 inch hole into the tank for the fitting, then gently tap-in the bung assembly.
- Using a large wrench to hold the bung’s outer collar, you crank-down the bolt.
- As it tightens, the bolt pulls up the crush sleeve on the back of the bung (inside the tank).
- The aluminum sleeve will deform against the backside of the tank, creating a strong seal to hold the bung.
- Remove the bolt and insert the -6 AN fitting in its place—voilà, you’ve got a port firmly on your tank.
FAST tell us this fitting will work with any tank material up to 1/4 inch thick and, better still, it says you can use this fitting for a fuel return, oil return, power steering return, or an ordinary vent port.
Get all the specs you need by clicking on the part number below:
- FST-307031 – FAST EZ-EFI -6 AN Return Line Fitting
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