Anyone running both mechanical and electric fuel pumps

[Loud&Obnoxious]

Hey guys is anyone running both mechanical and electric fuel pumps? And I don't mean inline with each other I mean 2 seperate fuel systems feeding to two different inlets on the P pump. I would like to hear your opinions on it.

 

[Jim Fulmer]

It's been work good now for 5 years, the electric is just on a switch, turn it on when you need it.

Jim

 

[BigYellowIron]

I run two but they feed the same port on the p7100.

 

[BigYellowIron]

Longitudinal scavenging.

Your going to have to explain better Im confused by those big words?:bang

 

[Loud&Obnoxious]

Longitudinal scavenging means fuel flows from one plunger and barrel assembly to the next in sequence. Crossflow scavenging means the fuel is supplied from a common supply channel and not a sequential system. So that would mean you wouldn't want to pressurize the end of the pump where your overflow valve is, but I would think that the port straight across from the stock inlet would be fine to pressurize.

 

[drodgers]

Feed the stock location, the overflow location, and move the return line to the front port.

That's my plan.
With a draw straw II, 3/8 line thru a remote filter and then to the lift pump, can the injector return line be tee'd into the 3/8 supply before the LP?
Can the p-pump return line be tee'd into the 3/8 supply after the LP?

FYI, the 1/2" outlet of the draw straw feeds a micron filter and Fass then direct to the p-pump and is on a switch to activate.