Return line question

[Remps]

How are you guys hooking up the return line with regulated lift pumps? Just tee into the factory return, or run a separate return line?

[cougar]

Anything wrong with returning it to the inlet side of the pump?

[Richie O]

I would use a dedicated return and go to the vent hose on the filler neck. I would not tap into anything thats already there.

[ahale2772]

not the greatest Idea to eliminate your return by feeding it into the inlet, return also acts as a air blead if the pump cavitates.

I made a bigger line coming from the regulator, and just T'ed the IP's return back in

[Remps]

Ok, thanks guys. I will put a tee in the vent hose and return it there. Lift pump on the 93 took a dump, so I guess I will put the 7.3 fuel pump and 15 psi relief valve on the 93 tmo. Steve.

[Remps]

Got the 7.3 fuel pump mounted and the relief valve teed into the vent hose a few days ago. Initially it was running 8-9 psi, and would suck it down to 0 by 15 lbs of boost. Adjusted the relief valve to 20 psi today, and now it'll hold 17 psi wide open. Smokes a little less at wot as well. I may turn the pressure down a little when the fuel filter gets replaced next week, as well as a section of 1/4" fuel line I had to use at the time. Will change it to 5/16", not much point in going bigger as the fuel pump fittings are 5/16". I'm sure bigger injectors will drop the pressure, at which point I will upgrade the draw straw and fuel pump inlet line and see how that goes. Oh, and I can't fuel the truck up with the fuel pump on anymore, just sprays back all over the place.

[ahale2772]

All the way out the filler neck? That's alot of returnin'

[Remps]

60 gph at 0 psi, 30 gph at 70 psi is what I read somewhere..

[ahale2772]

yeah i guess that would do it...