Gas tank?

[Henry88]

Can I weld on a sump on the bottom of my stock fuel tank and still use a mech. fuel pump?

 

[TexasT]

My first thought is, "Why do you think you need a sump?"

Plenty of real fast street cars without. I can think of literally 100's of more efficient ways to spend your time and money to make your car faster than installing a sump in the gas tank.

 

[Pitch Black]

I would think it would be a good idea if ur planning on running like 3/8 or 1/2 inch fuel lines. It would be hard to use big fuel lines that big from the top. If u do use one remember to turn ur outlets toward thr rear, so it forces the fuel to the outlets. Try Jegs "Jegster 40793 or the Jegster 40757 "

 

[dogsht]

Yea but what would the benefit of a sump be with a mechanical pump? If its to do it in stages as you are ready to do an aftermarket electrical pump I have good news.

Cheap aftermarket "Grand National" fuel tanks & plug N play aftermarket hanger & in-tank electric pump make a gravity fed electric pump & sump or cell obsolete expensive more work to install & dangerous (for a street car) by comparison. Really its obsolete for a gbody. Unfortunately short of custom fabrication its still the only option for a 70s or older car.

Check out tank & hanger/sending unit on ebay motors. Then http://www.racetronix.com click Buick Grand National link under fuel pump systems. The Walbro pump they use with proper wireing ie voltage is good to 600 HP with a factory 3/8" line and should quietly live the life a pump in a new Vette. Add in an inexpensive in line auto parts fuel filter for early 90s 350 TPI Camaro & a cheap roll of aluminum line to easy make a return line and your good. Oh yea if you are running a carberator you also need a return style fuel pressure regulator like the Mallory 4309 again check Jegs etc. I did this for my carberated 509 powered 442. Fuel pressure was rock steady and the pump was quiet as a new car & lived for the 9,000 miles that I had it.