Fuel Pump Wiring
Hey folks. I’m currently running a quantum 380lph quantum fuel pump. I’m getting occasional fuel starvation issues Due to a non-baffled tank and don’t want to replace my tank.
I’m wanting to add a Hyperfuel 40007 surge tank with single pump. My question is this, is the orange wire high enough amperage yo run both fuel pumps or do I need to add a relay to the mix?
I'd add a relay to the mix, never hurts.
Thanks - what's the average amp draw of a 380lph fuel pump? 7.5 amps? 10 amps?
Average can range from 10 up to 18 amps. No the orange wire isn't big enough. at least by the laws of electricity. There are published tables with the amperage, the distance and the gauge of wire needed. I know Blue Seas has a very easy to read one on their website. Don't use a relay on the fuel pump circuit, the ECM controls the fuel pump output my modulating the frequency...if you put a relay in it will lose the ability to modulate and the pump will be running at 100 percent all the time.
I am running a A1000 pump that is capable of 98 lbs p/min 20 Amp at full tilt. It will draw 7-15 amps at 5-65 psi for comparison. I second 7.4's comment on the fuel wire size. I snipped as close to the ECU wiring loom (that allowed enough room for soldering) and added a 10 GA wire to the pump. Solder all of your connections! For a rule of thumb, 8 ga = 40 Amps, 10 ga = 30 Amps, 12 ga = 20 Amps, 14 ga = 15 Amps. The wiring harness includes a Fuel Relay so I also agree that you don't want to add another. I did swap the fuel pump fuse from 15 amp to 25 amp.
I did find this in regards to your Quatum 380 pump:
- 11.8 amps @ 43.5PSI (13.5VDC)
- 12.8 amps @ 58.0PSI (13.5VDC)
- 14.4 amps @ 80.0PSI (13.5VDC)
Hope this helps.
~Matt