bigislandc2

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

boosted k20

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.

$MIKE$

iTrader: (13)

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

EJ1_Ex

iTrader: (1)

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

click on the S2000 link, use that diagram

wantboost

iTrader: (2)

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.

Turbo-LS

iTrader: (4)

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

wantboost

iTrader: (2)

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.

a1320addict

iTrader: (1)

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.

wantboost

iTrader: (2)

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.