bmf5150

what wire size u guys suggest for a intank fuel pump?

FastKat

iTrader: (10)

Mine is about 14-16 gauge (I think 14) and it runs the length of the car, from the fuse box to the pump.

xpndbl3

iTrader: (23)

I run 10 gauge on my car, but my pump is larger than stock. But really bigger is better since there is less voltage drop.

Pocket

iTrader: (22)

Stock 16ga

S10xGN

iTrader: (11)

I just bought an Aeromotive 340HP (in tank) as a replacement for the Walbro 340 in my S truck. what's funny is they recommend 10 gauge wire, but the pigtail wiring that comes with the pump looks to be 18 gauge! Guess they want to rule out the vehicle harness as a potential problem...

Pocket

iTrader: (22)

Most stock are 16ga, thats why I call BS on any gains people claim from a hotwire kit

Pop N Wood

iTrader: (1)

Fuel pumps don't draw much current, typically only a 7.5 amp fuse. Bigger wire won't hurt anything, but it probably doesn't help as much as some guys would like to think.

Just make sure you run a ground wire back to the main ground point under the dash. I'm not a big fan of using rusty car bodies to run the ground current through. the ground wire should be the same gauge as the power wire.

InsaneAuto86

iTrader: (60)

What size relay is everyone using? I'm mounting all fuel related wires in the rear next to my battery.

Pocket

iTrader: (22)

Common 30A relay is plenty

S10xGN

iTrader: (11)

I have a 40A fuse on the back of my alternator (B+) running through a 40A relay (#10 wire all the way) to the pump hanger. I don't claim the "hotwire" setup is going to add anything, but it sure won't detract anything either. It's more about the voltage at the pump than anything else, just look at the pump curve sheets if you have any doubts...