I am wanting to keep my stock tank just wanting to know if i will be able to use it with the motor that i have. I think that my mustang has a return fuel line but not too sure. The motor that im using is a 94 4v mod. I know it does have return on it. Or do i have to use a return?
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89 Fuel tank will it work?
- Thread starter 8t9notch
- Start date
If you have 3 lines going from the tank to the engine, then you've got a return line. The supply line is 5/16" O.D., and the return and vent lines are 1/4".
You didn't say how much of your '89 wiring you're going to use, but the fuel pump relay setup is different with a Mod Motor. Your '89 has the pump relay out back near the trunk, and the Mod Motor cars have it behind the kick panel on the passenger side. If you keep most of the '89 wiring and just connect the engine as required, the existing relay will work O.K.
You didn't say how much of your '89 wiring you're going to use, but the fuel pump relay setup is different with a Mod Motor. Your '89 has the pump relay out back near the trunk, and the Mod Motor cars have it behind the kick panel on the passenger side. If you keep most of the '89 wiring and just connect the engine as required, the existing relay will work O.K.
Does anyone know if the 1/4 inch line is big enough for the return with a 255 pump?
Yes it will work.
I'm knew to this... Question does the foxbody fuel pump work with the mod engine? Or how much p.s.I. does the mod motor need to work?
I think the answer to that will depend on how much hp you engine will make. The Fox pump will support about 350 HP just fine. If you go above that, I recommend upgrading the pump. PSI is not the problem. Volume is the problem. Are you running a return type system or returnless? The Fox used a return style system, which can be adapted to service virtually any of these motors.
I just got a mark viii engine that I'm building... I been told they have 280 or 290hp and I have a return line. So the p.s.I. from the fox should help up fine then.
Hold up Hahahah sorry I'm knew and I can't spell 
I agree that if you using the Mark VIII engine and looking for that HP, you'll be fine.