Looking for fuel line advice for stock magnum EFI and fuel pump

Magnum Engine Swaps

  1. Truckie

    Truckie Well-Known Member

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    I’m getting close to firing up my son’s 360 magnum in his 67 Dart. I’m using the stock EFI and I installed the fuel pump from the donor truck in the fuel tank. Any suggestions on what I should do for fuel line? Anyone have a source for stock connectors? Do I run steel line part way like it was on the donor truck or rubber the whole way. Any help is appreciated. Hoping to hear it run this weekend. The May 16th graduation deadline to have the car done is fast approaching and I still have lots to do.
     
  2. TrailBeast

    TrailBeast AKA Mopars4us on Youtube

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    Whatever you decide needs to be high pressure line, but I’m not sure I would use rubber even then.
    I used 3/8 nylon 12 high pressure line even though I don’t run efi.
    This is what I used for my supply and return both and has a 530 psi working capability and a 1,200 lb. burst rating.
    It may seem like over kill, but for the cost and ease of routing it served the purpose well.
    In my own opinion stainless steel line is always best, but...
    JEGS 159235: Nylon Fuel Injection Hose 3/8" O.D. x 10" | JEGS
     
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    • KosmicKuda

      KosmicKuda FABO Gold Member FABO Gold Member

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      I'm using a steel prebent 3/8 line from Inline Tube.
      Goes from the tank area all the way to the right side frame rail in the engine comoartment.
       
    • TT5.9mag

      TT5.9mag Two atmospheres are better than one

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      NAPA sells fittings that snap on to the factory quick disconnects on the pump and fuel rail and make things very easy. Similar to this one,
      image.jpg
      You can use rubber fuel injection hose that has a braid in it and a pressure rating of 250 psi but I would have the ends professionally crimped. Your local hydraulic hose outfit can set you up. Reminder though, NHRA wants no more than 12” of rubber line anywhere in the car. And that is a good standard to live up to if you’re going to race it. Street car will be just fine with high quality fuel injection hose properly attached to the body every 12” or so and away from exhaust.
       
    • MoparLeo

      MoparLeo NRA BENEFACTOR LEVEL LIFE MEMBER FABO Gold Member

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      Just to repeat some prior advice. FI operates at a constant high pressure. Steel lines, braided high pressure hose and FI connectors. No coolant hose clamps here. Pressure regulator and inline filter between tank and engine compartment. Use the factory original set up as a guide.
       
    • TT5.9mag

      TT5.9mag Two atmospheres are better than one

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      On my run stand I used 3/8” pushlok fuel injection hose on the above fittings and I didn’t crimp the ends, just some worm clamps. No leaks at all. I’m not recommending this for a permanent application but shows how well they seal.
      image.jpg
       
    • 80fbody

      80fbody Well-Known Member

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      Nic/Copper line is much easier to work with than steel. Definitely stay away from the green stuff sold at auto parts. Can’t flare with regular flare tool. I like -6an stainless braided but need to use PTFE these days due to ethanol and takes their own fittings.

      Could certainly run the nic/copper on the frame and short sections of braided to the pump/tank & motor.
       
    • TT5.9mag

      TT5.9mag Two atmospheres are better than one

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      I just hard lined the entire fuel system on my boat with 1/2” Ni/Cop (coast guard requirement) and it was very nice and easy to work with.
       
    • pishta

      pishta I know I'm right....

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      How do you terminate that hose? Push lock fittings available? That stuff does not want to push onto a barb. Is the piece really only 10 inches long?
       
    • Truckie

      Truckie Well-Known Member

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      They show 10” but in the description it says 10’. Videos I watched showed putting the tube in boiling water or using a hair dryer to soften it to slip over the barbs.
       
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      • Truckie

        Truckie Well-Known Member

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        I don’t think this car we’ll be seeing any drag strips. Lol.
         
      • TT5.9mag

        TT5.9mag Two atmospheres are better than one

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        You’re building it for your high school age son right? Lol I know what I did in high school. And a stock mag 360 has plenty of go so I wouldn’t rule it out. After driving it a while you may wonder what it will run.
         
      • Truckie

        Truckie Well-Known Member

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        After being used to driving the slant 6 with 2 barrel, headers and cut outs with the 2.76 rearend, he’ll probably be disappointed with the new set up.
         
      • dartslantsix

        dartslantsix Well-Known Member

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        My blog has a parts list of what I did:
        Fuel System Complete

        Used quick connect to AN adapters for the high pressure side and regular rubber line for the return.

         
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