[Junkyard Dawg]

I just recently purchased a fuel tank sump to weld into my '71 Malibu's stock fuel tank.

However I am planning on reusing the stock fuel lines that came with the car. I do however plan on having a piece of stainless braided line that will run from the sump to the existing piece of factory fuel line that once connected to the fuel tank pick up tube (located with the sending unit).

The car has a mechanical fuel pump on it as well.

I plan on running the car at the track and on the street.

But due to the fact I'm going to reuse the factory fuel line and mechanical fuel pump now has me wondering if it's even worth the hassle of installing this sump?

 

[TW]

My guess is that if you are not exceeding the capability of the stock line and mechanical pump, you won't gain anything by putting a sump in the tank. If you plan to go to an electric pump, the sump makes it easier on the pump because it doesn't have to draw the fuel up and out of the tank like the stock line requires.

Tom

 

[1hot67]

If you plan to go to an electric pump, the sump makes it easier on the pump because it doesn't have to draw the fuel up and out of the tank like the stock line requires.

That's the exact reason I went with a sump. It made sense to me.

 

[Junkyard Dawg]

The current line I believe is a 3/8. The car is a factory 350 car but I have replaced it with a big block 402 that's going to be a mid to high winding engine.

With that said does the stock fuel line sound adequade?

Also the fuel pump I'm using is a Carter 120gph pump.

You guys think if I got some air under my tires the stock fuel system could still handle it and not cavatate?

 

[chevl71]

I thought the whole reason for a sump is to gravity feed an electric pump placed at the rear of the car.
If you're using a mechanical you might as well use the stock pick up, since a mechanical pump is a "puller." Even if you go to a 1/2 inch line with the mechanical I don't know what a sump would gain you.

 

[Junkyard Dawg]

Thanks. Guess I'll send this sump back to Summit.