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HP Junky
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Discussion Starter · #1 · (Edited)
DIY Fuel System...now with pics

OKay, trying to gather up parts to build my fuel system to support the new injectors. Would this set-up work?

ITP in tank set-up then into a water seperator filter with a dual inlet/outlet head. Run two lines out of that pre filter, one to two seperate stock oem fuel pumps, then run the lines off those two pumps into a dual inlet/outlet filter head with a 2 mic filter. One line coming off each outlet feeding directly to each head.

So i would be running one pickup into the pre filter, then dualing everything thereafter to each head... Would that work, or would dumping both pumps back inot one post filter cause a rerstriction?

Any suggestions? Or ideas? Just trying to figure out the best way to do this
 

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<<< THE GAUGE WHORE...
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The only thing I can think of (and when I was thinking about this I came up with this...) is what if one fuel pump dies... then you are left with a truck running on one bank... I would run them in series?
 

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HP Junky
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Discussion Starter · #3 ·
I thought about that as well, but if both pumps were going back into one post filter and that post filter would feed the lines to each head, then if one pump died, the pressure just wouldn't be as strong. But the one pump could still support both banks.

Maybe I'm just not thinking right though?
 

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HP Junky
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Discussion Starter · #4 ·
Would running them parallel like this make enough pressure to support Mini Me's. Or is feeding the two pumps back into one filter causing to much restriction?

What about in series?
 

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I think you are right rockin
 

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<<< THE GAUGE WHORE...
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running them together makes one kind of a lift pump and the other mantains the pressure...
 

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HP Junky
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Discussion Starter · #7 ·
Fuel system is all done, plumbed it just like stated above and it works! 62psi at wide open throttle in every setting. :rockwoot:

Pictures will soon follow. It took me all day yesterday and a few hours this morning to get it finished up. It was a huge undertaking that took alot of patience and time, but it works.
 

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OEM Moderator
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It would be insteresting to unplug one pump and see how it runs on a single pump. That would make for a good comparision and would also give us a good idea if twin parallel pumps is a good idea with a built in safety factor.


Tom
 

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HP Junky
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Discussion Starter · #9 ·
Thats a good idea Tom, I'll try that and report back. I'll just remove the wire to the one pump so it doesn't kick on and see what happens...
 

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Were the holes for the brackets mounting the filters already there or did you have to drill the frame?
 

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Had to drill the frame, it wasn't that tough though, just need a good bit.
You might want to do a little research on the parts of the frame where they recommend to drill. Take a look at any of the airbag installation kits or even a GN hitch like the B&W.
 

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Normally, Jacob drilling the upper or lower lips of the frame is not recommended.

Not saying a couple holes is gonna weaken the frame to dangerous levels, but...
 

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I ended up drilling a single hole in mine and using a factory hole. I located my hole in a similar place and a similar size to the factory as I flat out could not see it being a problem ever. The hole was pretty small and was centered in the flange not out by the edge.


Tom
 

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Any results on running just one of the pumps.

Under normal circumstances you should be OK with drilling smaller holes, but under stress they can be a source of structural problems. I replaced the frame on my Willys because of stress cracks, and even the newer 1-ton frame had some cracks when I sold it. All cracks were in areas where holes were drilled in the frame.

Of course I would image you aren't going to put your truck thru the abuse I put my Willys thru. :D
 

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HP Junky
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Discussion Starter · #17 ·
I've now had the dual oem pump setup on my truck for almost two weeks and was at the race track on Friday. Five passes down the track and never once did the fuel pressure drop below the pre-set 62psi.

So apparently, done correctly, dual stock super duty pumps can supply enough fuel to aftermarket injectors.
 

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I was looking for results of having the two in paralellel and then shutting one off. Kinda like if one failed. Curious if they are a one way flow or if you would want to put in a check valve of some sort.
 
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