How to hard wire an Evo 8/9 Fuel pump relay for a double pumper setup

Today we wire up fuel pump relays for our customer Marks Evo 8 that is running twin 450 fuel pumps and a Hobbs Switch

[@3geclipsebuiltperformance883]

How can I do this type of direct current relay on my fully built Evo 8 swapped 3g eclipse currently has 255hp walbro high pressure version

[@ralleca15]

is it necessary to upgrade the return line when running a double pumper? got a -8an to feed the rail. thanks snailfed

[@snailfedperformance7177]

I would. With the volume of fuel you are running with two pumps on the feed side the stock fuel line is kind of a restriction. We run 6an returns that y off too two 4an lines. One goes to the factory fuel pump housing return. The other to the passenger side of the tank.

[@markc1456]

I'm running 2x460's in a Squash double pumper with -8AN Feed & using the OEM Feed hardline as my Return with -6AN to fuel rail & hangar! Can you see a problem there? Do I need full -6AN return? What are symptoms of a restriction in the Return line?

[@Jamxknife]

Where do you put your fuel pump grounds? Not the relay the fuel pump

[@snbmotorsports1526]

So did you have two wires run from the battery for power for each relay?

[@snailfedperformance7177]

Yes. We run one wire per relay.

[@snbmotorsports1526]

@@snailfedperformance7177 I’m actually in middle of doing this with mine for two 450s with hobb. I didn’t get why you did the Y connection of same wire into the relay and what was that wire for?

[@snailfedperformance7177]

@@snbmotorsports1526 its the ground wire. When the signal is sent to the relay it activates the ground.

[@massgass9131]

i thought the ground should come from the motor/trans?

[@snailfedperformance7177]

Just has to be ground to the chassis. The chassis itself is ground to the engine and the trans.