What's better than 1 fuel pump? - Ford Powerstroke Diesel Forum
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Old 10-19-2012, 06:39 PM
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What's better than 1 fuel pump?

So I've been tooling with the airdog 2 a good bit here lately, and the wheels in my head have been turning. I have an extra airdog 2 laying around, ifi wanted to run them in series (one feeding the other, like a booster pump) what would be required other than plumbing and a guage between the 2? How would the return lines work out? Or could I just cap the second hole on the discharge side of the pump and have it feed the existing pump? I know this has been done with an ad2 and an aero, but what about 2 ad2's? I know its overkill, but I don't care. Lol
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Old 10-19-2012, 07:10 PM
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If it were me, I would set the one closest to the tank at about 15psi of pressure out put and then depending on whether or not you have a RR kit on your truck, I would set it to about 60 psi if you do and set your regulator on the motor to 52-55psi. If you don't have a RR kit, I would just set the second pump to about 55psi and call it good. I also would tie the returns from each pump together with a Y and use a little bigger line than what each pump uses and send it back to the tank through a single port. I probably would also use a sump if you dont already have one and I would delete the fuel bowl and simply split the lines with a Y to feed each head.

Now I guess you could also run the back pump at about 52psi and the front one at like 45psi. I don't think it would hurt anything. Then this way if a pump died, the other one would just keep chugging. I am sure you could set it up just about any way be ok. I just wouldn't run either pump any where near max out put. You do want to run them at different pressures so you can see a pressure drop to know you lost a pump, should that be the case.
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Old 10-20-2012, 10:20 AM
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So what youre saying is having 3 regulators in the system? holy shiznit... that aught to be fun. But if it works for you, more power to you. I just see it being worthless to return fuel to the tank at 3 different locations, but thats just me. Blocking off returns of the airdog defeats the purpose of the unit.
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Old 10-20-2012, 10:28 AM
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Yea he would definitely have a A LOT going on for sure. I know if it were me, I would be tieing all those returns together at some point before the tank.
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Old 10-20-2012, 05:35 PM
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Quote:
Originally Posted by pizza pig View Post
So what youre saying is having 3 regulators in the system? holy shiznit... that aught to be fun. But if it works for you, more power to you. I just see it being worthless to return fuel to the tank at 3 different locations, but thats just me. Blocking off returns of the airdog defeats the purpose of the unit.
I'll need a lap top displaying amp draws, pump temps, and pump outputs before its all over.lol

In all honesty, it'll probably never happen, but it doesn't hurt to imagine. Lol
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