Fuel line routing

Fuel and Air Systems

  1. Shmaako

    Shmaako Well-Known Member

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    I need to install a new 3/8 fuel line for my Holley sniper and will use my old supply fuel line as a return line.
    Question is, would it be ok to run it under the crossmember like this?
    I'm not sure if drilling a hole through it is a better option. I plan to protect the line with a longer rubber hose split and wrapped around it, not just the small ones in the pic.
    Unless? 20200410_133642.jpg
     
  2. jonnyrose

    jonnyrose Well-Known Member

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    I wouldn't run it under
     
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    • str12-340

      str12-340 FABO Gold Member FABO Gold Member

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      There's a reason that Ma Chrysler drilled the cross member for your current fuel line. I'd drill it below the existing line and stick a grommet on both sides
       
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      • Shmaako

        Shmaako Well-Known Member

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        I am not opposed to drilling another 1/2" hole beside my torsion bar socket and sub frame connector but I wasn't sure the negatives in doing that either. So I figured I would ask to see what the best way to proceed was.
         
      • 1969383S

        1969383S FABO Gold Member FABO Gold Member

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        Protect it the best you can with the understanding. Even the factory lines can get cut!
         
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        • doug 371

          doug 371 Well-Known Member

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          I drilled mine then welded a pipe nipple in...
           
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          • 1969383S

            1969383S FABO Gold Member FABO Gold Member

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            Sometimes you are required to do this! NHRA used to be strict about this!

            Street car anything goes. Be safe and smart JMO!
             
          • Dana67Dart

            Dana67Dart Like a fine wine, only getting better with age! FABO Gold Member

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            Is there an oem hole in the cross member on the other side of the car? No one said the fuel lines had to be on o e side only
             
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            • crackedback

              crackedback FABO Gold Member FABO Gold Member

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              open up the existing opening, get some pipe and make a couple of standoffs and weld it to the X member. upper longer than lower so you can get a wrench on them.

              Did this all the time on stock elim/ SS cars.

              8MG4Vyy.jpg

              FQpaxVj.jpg
               
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              • Shmaako

                Shmaako Well-Known Member

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                Unfortunately no holes abvailable on other side either
                 
              • Shmaako

                Shmaako Well-Known Member

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                I think welding a pipe through may ease my mind about drilling another hole.
                 
              • crackedback

                crackedback FABO Gold Member FABO Gold Member

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                Make a plate that the two pipes pass through and tack the pipes to the plate. Make a similar plate for the other side. When fitted, tack pipes to plate and plate to X member. Done deal.
                 
              • g413

                g413 Well-Known Member

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                I had basically the same question. I'm not sure if I'm going to keep the 5/16" line as return or not, but I also have a new 3/8" line I want to install. After looking at all the preformed bends in the new line, I wondered has anybody been able to thread the new line through the hole and keep the line in one piece?

                BTW, I really liked some of the solutions presented.
                 
              • crackedback

                crackedback FABO Gold Member FABO Gold Member

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                Have to be careful if running a smaller return line than feed. It may create pressure creep as the return a bit more restrictive. Not always, something to watch for.
                 
              • 67Dart273

                67Dart273 FABO Gold Member FABO Gold Member

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                Agree. I made that mistake on my first TBI EFI. Used the 1/4 vapor line and it barely had enough capacity and the backpressure was right on the edge. Run same size return as supply
                 
              • Shmaako

                Shmaako Well-Known Member

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                I called Holley and they said it sould be fine to keep the 5/16 line as a return. Hopefully I don't run into issues.
                 
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