ON3 Fuel system

I just got the sai li for 875 through Lethal. Hopefully it supports my set up well.

RubyRedBoost said:

I just got the sai li for 875 through Lethal. Hopefully it supports my set up well.

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What injectors are you on? Should be fine on that pulley with the sai kit. Once my tune gets dialed I'm gonna drop to the 3.6, and then maybe 3.48.

ID1050X

RubyRedBoost said:

I just got the sai li for 875 through Lethal. Hopefully it supports my set up well.

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It'll support 800-850 easily.

Tommy V said:

Can u give me the part # or their u get them.U can pm me if u want.Im not trying to sell fuel systems just want to build my own so any help would be appreciated.

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MOTORCRAFT WPT1266 {#CU2Z14S411TA} - RockAuto had it pretty cheap and easy to find.

higdominator said:

It'll support 800-850 easily.



MOTORCRAFT WPT1266 {#CU2Z14S411TA} - RockAuto had it pretty cheap and easy to find.

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Awesome that’s my more than enough till I get a short block. Are the push lock hoses worth a damn?

They work and I’ve used them before but i prefer the traditional style with a nylon outer braid hose.

higdominator said:

It'll support 800-850 easily.



MOTORCRAFT WPT1266 {#CU2Z14S411TA} - RockAuto had it pretty cheap and easy to find.

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Thanks man!!!!

Jn2 said:

Here you go, the entire harness already made for you, all you got to do is plug it in, tap the FPCM and power/ground the wires.
https://www.lethalperformance.com/l...harness-mustang-gt500-shelby-boss-coyote.html

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What about the fuel sending unit,don't u have to tap two wires into the factory plug to make the gauge work??

Tommy V said:

What about the fuel sending unit,don't u have to tap two wires into the factory plug to make the gauge work??

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That's the teal and purple wires you see coming out of the plug in the lethal wiring kit.

The ON3 hat is nice. I had one on my 98 GT.. I would buy the hat but add your own pumps/lines.. or you can make it easier and buy the Sai Li kit.

Made my own kit and with the lethal harness I still will only have $650 on the fuel system and that's with gt 350 pumps.

Tommy V said:

Made my own kit and with the lethal harness I still will only have $650 on the fuel system and that's with gt 350 pumps.

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Nice! I was right under/at $600 all in but i had some hose ends from a previous project. $650 sounds like what i would have been at.

higdominator said:

Nice! I was right under/at $600 all in but i had some hose ends from a previous project. $650 sounds like what i would have been at.

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Yea I think that is an awesome price for a capable fuel system.I also upgraded to ptfe fuel line an a aeromotive regulator.If mine supports what your putting out I will be happy and no more buying race fuel lol.

Tommy V said:

Made my own kit and with the lethal harness I still will only have $650 on the fuel system and that's with gt 350 pumps.

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yes, the fuel level wires need to be connected to the OEM wires. It's obvious which ones they are bc they are like 18 gauge wire...when the rest are 12 gauge

Tommy V said:

Yea I think that is an awesome price for a capable fuel system.I also upgraded to ptfe fuel line an a aeromotive regulator.If mine supports what your putting out I will be happy and no more buying race fuel lol.

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Wait ti'll you get to actually wiring it all...takes about 2 hours...this harness was made for a customer who wanted the second pump on a Hobbs switch, normally it would only be red wires that are exposed since most of those go under carpet as they route into the engine bay to get to the battery.

I do also make a fuse box set up for them to make it a bit cleaner when installed in the trunk, the pic I posted is before any wire loom was added.