MicroSquirt.com read only forum (Jan.15,2018)

Hi All,

Squirting a 68 Chevelle and adding a TPI system to the 307. I've looked at the VW and Ford External pumps but would like to find an in-tank pump that will fit in the smallish opening in the stock 68 fuel tank. Rigging it up to the pickup won't be much of a problem, but it has to fit thru that hole first.

Does anyone know of a in-tank pump with a diameter small enough to work?

Has anyone done something like this to a 60s' Chevrolet without replacing the tank?

Regards,

Jim Wooten

I thought of doing that but decided on a BBK external made for a late model mustang. The BBK is very quiet and plenty strong for my big block. I would think you can use any intank pump that will fit in the hole. be very careful with the wiring...leaks...sparks... no good!

Don't forget to make sure your fuel tank is baffled before just tossing a pump in there.

I haven't talked to anyone who has rigged up an internal pump on an older car like that. Most people (myself included) seems to end up with an external pump. As you note, the opening on the Chevelle tank is quite small, plus the tank is not very tall. By the time you hang a pump on there, you're gonna have a tough time fitting it into hole along with the fuel-level-sender float. I'm not saying it can't be done, just sharing my own thoughts/experiences.

In my first effort, I merely added a second line to the fuel-pickup and used this to feed my external pump. Worked good until fuel got below 1/3 of a tank, going around corners, or hard acceleration. For my second effort, I added a conventional drag-race sump to my fuel tank. I haven't really driven the car enough to have an opinion on how good this works. I have a feeling I'm going to find limitations that I don't like.

There's a place called Rock Valley that will make a custom tank for an EFI Chevelle application (among others). Costs somewhere around $700-800 -- too steep for me.

Frankly, if I was to do it all over again, I'd make up a surge tank and feed it with a stock mechanical pump.

-Dave

I plan on going with a surge tank as well for my carbed application. Even though I can weld, I'm not going to chance it with something like this so I'll buy a prefab'd one. I'm hoping to find an "inexpensive" one but haven't been able to yet.