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Fuel line size

Discussion in 'Builds and Fabricators Forum' started by Uncle Jeep, Nov 7, 2015.

  1. Uncle Jeep

    Uncle Jeep Snow in the desert??

    Ok, I'm trying to replumb my 3b. The previous owner had all kinds of Frankenstein line of various sizes and compositions. Heck, he had part of the rubber line touching the exhaust! Anyways, it has a stock ford 302 in it with a stock 2 bbl carb. It has an Autozone electric fuel pump (1.5 to 4 psi) and an aftermarket plastic under seat tank waiting for installation. I'm kinda leaning towards using 1/4" hardline for the majority but it it too big or too small for this?
     
    Uncle Jeep, Nov 7, 2015
    #1
  2. 47v6

    47v6 junk wrecker! 2023 Sponsor 2022 Sponsor

    i have been told 5/16 is the size for fuel supply. Thats what I plan on using.
     
    47v6, Nov 7, 2015
    #2
  3. Fly Navy

    Fly Navy Member

    Low horsepower small block fords and chevy's usually used 5/16" fuel line from the factory. Big Blocks and higher horse small blocks use 3/8" fuel line.
     
    Fly Navy, Nov 7, 2015
    #3
  4. timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Pretty sure Jeep used 1/4" line for these Jeeps, but IMO that's too small for that engine. Go with 5/16".
     
    timgr, Nov 8, 2015
    #4
  5. Uncle Jeep

    Uncle Jeep Snow in the desert??

    5/16 it is then. Thanks for the input guys.
     
    Uncle Jeep, Nov 8, 2015
    #5
  6. Johns1967CJ5

    Johns1967CJ5 Sponsor

    One line was 5/16" and one was 1/4"
     
    Johns1967CJ5, Nov 8, 2015
    #6