How to run two fuel pumps with fuel cell?
This is very doable, but it requires two separate fuel lines, or else one fuel line that is large enough to accomodate the full flow from both fuel pumps. Most cars use fuel lines that are about 5/16″ inside diameter (id). A high performance car with a single fuel pump would typically use 3/8″ id. If you are requiring enough fuel to run two fuel pumps, I would recommend running 3/8″ id out of the pump and then ensuring that the mating-point forward is 1/2″.