Hi guys I did a search but was unsuccessful sometimes I find what I need other times it's completely off lol..
But any ways is was wondering how are you guys wiring dual fuel pumps on the fullblown hangers?
Using 2 relays? And just getting the power from stock connector?
Thanks

 

You need to run a relay for each pump. the stock power wiring for the pumps will be used for the signal to trigger the relays.

 

I am running 2 relays, signal from the OEM plug and 4 ga. Power direct from battery to the relays( with In line fuse)

 

Acura/Honda - Instruction - FRS, BRZ, Turbo Kit, Fabrication, Fuel System

click on the S2000 link, use that diagram

 

Each pump needs its own fuse and relay. The pumps need to be hardwired using at least 8ga wire. You can use the OEM signal to trigger each relay.

 

Properly sized wiring and relay you can do a single relay and feed and a fused distribution block. Don't run the small square relays. Get a heavy duty 100amp battery disconnect relay. There about 18 bucks on eBay along with a 4awg wire split into two 8's close to the tank area will be more than sufficient. There isn't a pump that will fit in that hanger setup that requires that much current to even need that size wiring but it's best to use a little larger for good measures

 

I like to go a little big on the wiring just in case. Last thing you want happening if something goes wrong (over current) is melting wires and a risk of a fire hazard, especially when fuel is involved.

If you're aiming for high power levels, which I will assume yes from the use of dual pumps, go a little large with the wiring.

Depending on what pumps you're using and at what output a single pump can easily pull 30amps as it's upper limit. It's not only hard but unsafe to run this kind of setup off a single fuse or relay. Especially if using a cheap relay.

Split the pumps up, reduce the load on any one component, and be merry lol.

 

There is absolutely no reason to run 8AWG wire to an in-tank pump such as one the Full Blown kit will allow. A Walbro 400 at a fair amount of base pressure and ~35lbs will not draw above 20A. If you use a good quality conductor, 14AWG is more than sufficient - depending on run length even 16AWG. A Weldon will draw 30-35A, mainly due to in-rush current - not an in-tank Walbro, Aeromotive, etc.

I also do not agree with advising a separate relay for each pump. In the event one pump craps out, then what? Both pumps should be wired as follows:

BAT + > 35A/40A In-Line Fuse Holder (Better yet, resettable breaker) > Tyco 50A Power Relay > Fuel Pump(s) Postive
-Chassis Ground to #85
-OE Fuel Pump 12V to #86.

 

Yea that makes sense.

I like the breakers a lot more than fuses, especially if you're trying to troubleshoot and you pop multiple fuses. They start to get expensive after a while lol.