Moderator - The Electrical Bay and Rocky Mountain Bolters
Hello fellow hotrodders. I am in the process of collecting the parts to put a 2000 5.3 ls motor in my 67 suburban.
I have been looking for an in tank fuel pump to no avail. Does anyone know of a pump that is small enough to fit into the stock type gas tank, that will provide the high fuel pressure needed (45-50 psi).
My gas tank is from Brothers Truck parts.
I'm trying to avoid the noisy external fuel pump and the expense of a modern fuel cell. thanks.
Last edited by Rusty Rod; Tue May 12 2020 03:06 AM.
There are new inline pumps just for this. You can always cut a new hole and make a mounting flange for the in-tank pumps. Shop Summit racing for a pump, and while you have the tank out, figure out where the return line is going to enter at.
No problem with gas residue in the tank, just hook a flex hose up to a tail pipe and let run till tank is warm to the touch. You can then cut/weld/solder with no danger. We usually just cut the pump mount flange out of a donor tank and braze/solder it to the projects tank, this keeps the pump and mount together as a pair. The gauge sender will not be correct so a separate mount for an aftermarket sender is used. Pick a donor that uses the same pressure you need.
Looks like you should be able to hang a walbro 255 pump on the stock pickup and set it so the sock sits flat on bottom. Just have to fold the sock on the way in. Ive done a bunch like that. I did find one thinner pump before but I will have to go back and see if I can find info on what it was from.
Ive seen those plastic accordion type factory hoses from the pump blow off about mmmmm 5 times on different trucks so far🤣. It was my dads truck once. I always zip tie them before I put a aftermarket one in the tank because they are just a press fit. Must be faster and easier on the assembly line........then screws ya later as always.
Evan, I use either Nitrogen or CO2 gas as a purge when I'm welding or cutting on fuel tanks. Set up a pressure regulator at a slow constant flow into the tank and lei it run for a couple of minutes to displace all the oxygen. Jerry
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