Question about running twin fuel pumps. I have two, in tank Walbro 255 fuel pumps and I just want to know if I can split the single power/ground already there into two, to run both pumps or do I have to run another power and ground to the second pump. If so, what is the best way to do this?

Respectfully,
Patrick

 

The stock fuel system wiring system has a lot of voltage drop do to use of small gauge wires, and also using a small grounding wiring going forward instead of using the chassis ground near the pump. For a single pump upgrade many run parallel wires to increase current flow and thus apply full voltage but still have the pump speed relay.

Since you have a high flow setup, the speed control relay might not be able to handle the increase of current. Thus many move/use the FP circuit opening relay near the pumps to switch on full battery/charger voltage to the pump/pumps. This requires total rewiring.

 

The search button works wonders, use it

https://www.rx7club.com/showthread.p...wire+fuel+pump

https://www.rx7club.com/showthread.p...wire+fuel+pump

 

http://www.reganrotaryracing.com/fddualfuelpumps.htm

 

Thanks for the info. Helps out alot.

Thank you for posting these two related threads. Sorry about the search.

Thank you for this thread as well