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Turbo Foxbody fuel system ?

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Old Jul 25, 2012 | 01:13 AM
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Default Turbo Foxbody fuel system ?
I'm in need of ideas as to how to setup a boost ref. regulator in a 1991 foxbody. I want to use the stock lines or Dorman nylon fuel line.

Do I need the corvette filter/regulator?

I'm using a 255 walbro pump and a returnless fuel rail.


This is my first swap so any input is appreciated.
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Old Jul 25, 2012 | 01:38 AM
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I dont think the corvette filter/regulator is boost referenced. Probably gonna have to go with an external regulator between the rails and stock fuel lines. Dead headed.
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Old Jul 25, 2012 | 02:32 AM
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Originally Posted by 89L98T56
I dont think the corvette filter/regulator is boost referenced. Probably gonna have to go with an external regulator between the rails and stock fuel lines. Dead headed.
walbro 255 in tank pump--->fuel filter--->stock fuel lines extended---->external boost regulator---->fuel rail

would that work?
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Old Jul 25, 2012 | 02:37 AM
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How much power you trying to make and on what fuel? I know some of the foxes are only 5/16 line, do you have a 3/8 feed line? What you have listed above will work, I recommend the mallory 4305M regulator.
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Old Jul 25, 2012 | 02:56 AM
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Originally Posted by skinnies
How much power you trying to make and on what fuel? I know some of the foxes are only 5/16 line, do you have a 3/8 feed line? What you have listed above will work, I recommend the mallory 4305M regulator.
Want to make around 450+ rwhp on 91 octane, for now. Yeah, the fox feed line is 5/16 and return is 1/4. I have 25 ft of 3/8 Dorman nylon fuel line so I was planning on making a new feed line if the 5/16 fox stock feed isnt enough. Also a 5/16 return line.

I will look up that Mallory regulator


Thanks!
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Old Jul 25, 2012 | 03:29 AM
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5/16 is plenty for 450rwhp on 91
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Old Jul 25, 2012 | 02:36 PM
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Originally Posted by 94'BLKBRD
walbro 255 in tank pump--->fuel filter--->stock fuel lines extended---->external boost regulator---->fuel rail

would that work?
Yes. Here is how I did mine on my terminator swapped 97 cobra.

Aeromotive 340-->Stock filter and hard lines (5/16 feed 1/4 return)--->Aeromotive boost referenced external FPR----->fuel rails.

Making 440rwhp on pump.
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Old Jul 25, 2012 | 03:00 PM
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Originally Posted by 89L98T56
Yes. Here is how I did mine on my terminator swapped 97 cobra.

Aeromotive 340-->Stock filter and hard lines (5/16 feed 1/4 return)--->Aeromotive boost referenced external FPR----->fuel rails.

Making 440rwhp on pump.
What kind of fuel line did you use from the stock hardlines to regulator? Rubber, nylon?
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Old Jul 26, 2012 | 02:07 PM
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I used stainless steel braided 6AN lines. With these adapters that attach to the factory hardline on one side, and have a male 6AN fitting on the other.

http://www.summitracing.com/parts/RUS-644110/
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