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Post by Stinger on Jul 13, 2015 23:50:02 GMT -5
Here is a good diagram showing how to wire a large fuel pump so it gets proper voltage and doesn't overwork the stock wiring.
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mosvo
Boosting 15 psi
Posts: 59
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Post by mosvo on Mar 9, 2018 10:02:21 GMT -5
o wow i see what you did there, its double relayed. i didnt even think of that! that will make life a lot easier. thanks alot man! as always your a huge help
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Post by gr8ride65 on Jun 3, 2019 18:49:34 GMT -5
Where do you suggest running the new wiring and mounting the new relay?
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Post by Stinger on Jun 3, 2019 22:26:16 GMT -5
Depends on battery location, notch or hatchback, etc.
If it's a notch and the battery is in the stock location, running the wires under the carpet & seats or you can run them under the car following the general path of the fuel lines.
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Post by napoleon on Jun 27, 2019 17:51:25 GMT -5
I was looking at options for wiring my new 340lph in tank Aeromotive pump. I’m wondering if it’s really necessary though. I’m going to finish wiring the pump up and mounting it today but the wires coming out of the pump are 14ga maybe 16 and are terminated internally so no upgrading to the pump. But 14ga wire @ ambient temp at 12-14vdc is capable of handling around 15 amps constant up to 50ft. The factory wiring is about 12-14ga from what I can tell and doesn’t run a total of 50ft. As soon as I get this wired I really want to measure current draw but is there anyone else that did the math and or measurements on pump draw and if upgrading the wiring and relaying worth it? I’ll do the math and measurements once it’s installed but I would like to compare someone else’s findings to my own.
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Post by Stinger on Jun 27, 2019 20:46:01 GMT -5
Regardless of the math, I know that tuning an engine with stock wiring and a 255 or larger pump that's being pushed pretty hard, then upgrading the wiring makes you have to re-tune because the fuel flow changes so much (it's pig rich after the wiring change).
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Post by tbird86 on Apr 27, 2020 5:28:26 GMT -5
If you are using an in tank 255lph, should you just run the larger wiring to the connector at top of fuel tank?
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Post by Stinger on Apr 27, 2020 12:25:49 GMT -5
Yes, that's fine.
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Post by tbird86 on Apr 27, 2020 16:57:30 GMT -5
I was hoping that I wouldn't have to run it all the way to the pump because I have already installed the 255 in my mustang. I wonder why that short section from the connector to the pump doesn't cause any issues? Does that short of a section just not allow for enough voltage drop to be an issue?
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Post by Stinger on Apr 27, 2020 17:38:06 GMT -5
The losses are directly related to wire length so yes.
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svo375
Boosting 5 psi
Posts: 10
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Post by svo375 on Feb 28, 2024 14:38:09 GMT -5
I'm looking at doing the 10 gauge upgrade and looking at the wiring coming from the tank; I have pink/black, yellow and two black wires. Which wire would go to pin 85, and which would go to pin 87? Thanks
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Post by Stinger on Feb 29, 2024 2:34:57 GMT -5
Wire color doesn't mean anything as it changes by application and year to year within the same application. You'd need to test the wires with a multimeter to determine what each one is.
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