[Zooguy]

I'm wanting to upgrade to an electric fuel pump and utilize the existing lines. I'm not building a high horsepower vehicle just a cruiser. I have a 1966 and does have a metal return line/vent line back to the tank. I'm wanting to bypass the mechanical fuel pump. Does somebody make a block plate?
Does anybody have recommendations on a external in-line fuel pump and return regulator?

[ZeGermanHam]

Why are you wanting to change to an electric fuel pump? Are you planning a change to EFI?

[Cliff R]

I see this a lot as this new fuel is gone (evaporates) in 1-2 days after a hot shut-down. It takes several cycles of cranking to get fuel back to the bowl before the engine will fire up on a cold start.

An electric in-line pump fills the carburetor when you turn the key on. Although a nice upgrade for that reason several things need to happen for the install. You need to use a relay to supply voltage to the pump, not direct wiring. I would also run the voltage thru an oil pressure switch with a bypass for starting when there is no oil pressure.

If you direct wire the pump stays on after engine shut-down. If you are involved in an accident there can be dangerous consequences from having the pump continue to run......FWIW.......

[Tom Vaught]

1)

Originally Posted by Cliff R

I see this a lot as this new fuel is gone (evaporates) in 1-2 days after a hot shut-down. It takes several cycles of cranking to get fuel back to the bowl before the engine will fire up on a cold start.

2) An electric in-line pump fills the carburetor when you turn the key on. Although a nice upgrade for that reason several things need to happen for the install. You need to use a relay to supply voltage to the pump, not direct wiring. I would also run the voltage thru an oil pressure switch with a bypass for starting when there is no oil pressure.

3) If you direct wire the pump stays on after engine shut-down. If you are involved in an accident there can be dangerous consequences from having the pump continue to run......FWIW.......

1) Gasoline has changed a lot since the 60s thru 90s. Much quicker evaporation. The small "return line" is actually a fuel vapor return line.
An electric fuel pump WILL fill the bowl quicker and less stress on the starter.

2) I personally ran a 40 amp relay with the Positive coming from the Battery + terminal. The push button "On" switch was actually hidden where the cigarette lighter resided. Push the lighter forward and power was available to the 40 amp relay. The 40 amp relay wire came from the trunk mounted battery + terminal to the relay, to the fuel pump, and then the ground went
back to the - on the battery. The Battery was mounted securely at the spare tire mount in a battery box.

3) I also used a oil pressure sensing switch next to the distributor to kill the pump voltage IF the engine lost oil pressure (engine failure or engine just off).

A bit of thinking on how to do the job safely but Cliff has given you the Blueprint for doing the job properly.

Tom V.

[78w72]

Originally Posted by Zooguy

I'm wanting to upgrade to an electric fuel pump and utilize the existing lines. I'm not building a high horsepower vehicle just a cruiser. I have a 1966 and does have a metal return line/vent line back to the tank. I'm wanting to bypass the mechanical fuel pump. Does somebody make a block plate?
Does anybody have recommendations on a external in-line fuel pump and return regulator?

lots of return regulators out there, if you arent building a high HP engine you dont need one of the expensive or racing ones, mallory or holley make a smaller ones for decent prices. here a block off plate.

https://www.summitracing.com/parts/s...SABEgLrsfD_BwE