Fuel pump question on 79 carb

[mbouse]

Touché

[bobcity]

BOBCITY - - - you won't hurt anything by keeping that electric fuel pump. but, you might wanna check to see if the previous owner installed a blanking plate to the side of your engine block when he removed the failed mechanical pump.

Yes there is a blanking plate.
So if I understand, It would be a good Idea to move the pump the the truck area. I haven't investigated the wiring for the pump. It is mounted, as someone mentioned by bolting to the inside of engine compartment right above the canister. Works pretty well as a sounding board. I always know if I've left the key on, that's for sure.

I really like the security idea too.

[racydave]

From what I understand the pumps push better than pull, so its best to have them closer to the gas. Some carbs actually have a fuel return line. This helps to keep the volume of fuel more available.

[Fiat88]

I have a electric fuel pump that the PO installed in the trunk, should the two ports on the original mechanical fuel pump under the manifold be capped off with vaccum caps?

[So Cal Mark]

really no need to cap the pump ports

[baltobernie]

1974 was the only non-fuel injected year that Spiders came from the factory with electric fuel pumps.

My 1973 came with a factory-installed electric pump mounted in the trunk. I replaced it during restoration with a Facet low-pressure "cube" pump, and kept the factory return line, vapor separator, canister, etc.



Yes, electric pumps would rather "push" than "pull". More efficient, plus the trunk is a lot cooler than the engine compartment.

In addition to anti-theft, another useful function of a manual fuel pump switch is that you can turn Off the pump a minute or a mile from your destination. Keeps the stink down in your garage and prevents heat soak during these 90℉ days.

I don't know if the mechanical pump models had a return line, but I'd keep it functional if doing an electric conversion.

Lastly, some restorers install a trip switch from a modern car to kill the fuel pump in case of a collision.

[Fiat88]

really no need to cap the pump ports

Ok good as it's a pain to reach those ports.