69 C10 with in-cab tank
I'm in the planning stages for an EFI conversion on this truck. I don't believe I can retrofit an in-tank pump to the in-cab tank due to its shape. It's tall and thin with a slanted top. The fuel outlet is on the slanted top of the tank. I'm concerned that the inline EFI pumps won't be able to suck the fuel out of the tank through the top feed. That leaves me with something like the FCC2. But that adds some additional clutter under the hood. I'd like to hear comments/feedback. Is this a previously solved problem? Thanks for any help.
Leon
I started this website and I drive a 67 c10 daily with m in tank pump daily. Now I would not recommend my solution, but you may find your own.
I took a 72 hanger assembly and cut the pickup off to allow for the length of the pump and strainer. Then used a Phillips screw driver to flare the end, with a few hammer taps. The pump can blow off with the high pressure.
The trick is running the pump power through the hanger flange. I extended the wires, drilled a holed and used Permatex to seal. Not ideal, but has worked.
Get some double ended studs to use as bulkhead. Isolate with nylon nuts. Much safer....
Thanks for the reply. I didn't think the pump would fit through the hole in the top of the tank. I also thought the 5/16" vent pipe on the 72 assembly would be too small for a return line. Apparently I'm wrong on both counts. What pump and strainer did you use? I could use a flaring tool to bell the end slightly so the hose wouldn't pop off. The nylon bulkhead fitting for power sounds like a good idea. Do both power and ground need to be brought out? Grounding to the tank seems a little sketchy, but I guess that's how the gas gauge sender works.
What did you use for the return line? I'm thinking perhaps a second copy of the factory supply line from one of the repro truck parts suppliers. I could mount it next to the original line with some standoff clamps. Maybe even fab up some connections that eliminate flex hose inside the cab.
You are going down the right path.
I used an Aeromotive 340lph stealth pump wit1h the supplied strainer.
I stopped by Summit Racing today and picked up a 72 sending unit and and the Aeromotive pump.
The sales guy suggested some adapters that go from steel tube compression to AN flare for the connections to the sender pipes.
What did you use?
He also suggested a local connector supply company for a bulkhead fitting to pass the wires through the sender and seal it up.
I'll check with them later in the week.
I am curious about the bulkhead. Let me know.
I used fuel injection rubber hose with fuel injection clamps on the sender outlet and return. I use AN fittings and braided hose on the Fitech end.
The Summit part # for the tube to AN fitting is EAR-AT165056ERL
Summit has a pump wire bulkhead connector (ABT-CFD-504) but it's an inch in diameter. I think that's too big to fit on the sender.
I found a smaller one (Ancor 764998 from Amazon). It uses 3/8 NPT, though, so it's not much smaller.
I like the summit one. Placing it can be a problem. Remove the small return, vent, port and install a 3/8 return bung on the tank. That may give you enough room on the flange. Or mount the bulkhead on the tank with a long lead to the pump. Long enough to plug in while out of the tank. Make sure and use fuel rated wire.