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Technical Inverted Flare Adaptor Needed!

Discussion in 'The Hokey Ass Message Board' started by Crazy Steve, Mar 15, 2019.

  1. Well, I just got a box of goodies from Summit, including one of their carbs. Nice looking piece by the way. I'm going to be a busy boy for more than a few days, and thankfully the weather is turning warmer so my old bones won't ache while I'm in the shop...

    Anyway, my problem. The carb comes with a nice chrome dual-inlet fuel line that accepts a 3/8" inverted flare fitting. But my existing line is 5/16"...

    The line that's installed is 5/16" and is a hard line from the pump to the existing carb. My hat's off the PO as he did a great job of routing it around everything and the carb end is just about where it needs to be.

    After searching the 'net in vain, I was unable to find a reducer from 3/8 male flare to 5/16 female flare. Seems like they make every other combination, just not this one.
    Anybody ever run into one of these critters, or am I facing re-running the line in 3/8"?

    And no, I'm not going to convert to rubber line, I like the safety of a hard line.
     
    Last edited: Mar 15, 2019
    chryslerfan55 likes this.
  2. Inked Monkey
    Joined: Apr 19, 2011
    Posts: 1,420

    Inked Monkey
    Member

    Have you tried your local Ace Hardware? I'm always surprised at the crap I find there.
     
    dana barlow likes this.
  3. Andy
    Joined: Nov 17, 2002
    Posts: 4,372

    Andy
    Member

    Maybe two adapters with male and female pipe threads?
     
  4. BJR
    Joined: Mar 11, 2005
    Posts: 5,309

    BJR
    Member

    Will one line fit inside the other line? If so stick one inside the other and braze together. Or use a punch and spread the bigger tube so the smaller one would fit inside. I have done that before with no problems.
     
    54vicky likes this.
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  5. Bandit Billy
    Joined: Sep 16, 2014
    Posts: 4,702

    Bandit Billy
    ALLIANCE MEMBER

    Call Summit and see if they offer an adapter for their carb. You cant be the only one in need.
     
    ffr1222k and Hnstray like this.
  6. Search the for the nut diameter and thread count on both ends instead of tubing diameter. I would help more but I don't have Google signal where I am.
     
  7. Hay guys, they make bushings for this issue if I'm reading this right. So being I'm medicated past comfort zone let's be clear. If you had a piece of tube threaded 5/16" pipe inside and 3/8" pipe outside is that the fix?
     
  8. Picture this without the Hex,
    [​IMG]
     
  9. Try 1\2-20 ifm to 5\8-18 iff
     
    Last edited: Mar 15, 2019
  10. saltflats
    Joined: Aug 14, 2007
    Posts: 9,067

    saltflats
    Member
    from Missouri

    They make flare nuts that will do that, look at some master cylinder flare nuts.
     
    Hnstray likes this.
  11. I see the photo didn't like my process. Let me add, I don't like multiple parts stacked together to make One piece. These bushings disappear when installed right. I believe they came out of the Holly parts catalog.
    20190315_140142.jpg
     
    2manycars2littletime and RICH B like this.
  12. I was going to suggest that also, just make sure the tube will cover the hole and seal. Or a block from on size to the other, or an inline filter with pipe threads to be your adapter.
     
  13. Last edited: Mar 15, 2019
  14. nunattax
    Joined: Jan 10, 2011
    Posts: 1,644

    nunattax
    Member

    run a new line from the pump in 3/8.should not be too difficult.
     
  15. Andy
    Joined: Nov 17, 2002
    Posts: 4,372

    Andy
    Member

     
  16. At this point only he knows for sure, my interpretation is 3/8 tube inverted flare female to 5/16 tube inverted flare male is what he needs to connect. I believe 3/8 iff has 5/8-18 threads on the nut/fitting.
     
  17. Mr48chev
    Joined: Dec 28, 2007
    Posts: 24,418

    Mr48chev
    ALLIANCE MEMBER

    I'm not finding any that are exactly what you are hunting for.
     
  18. Black_Sheep
    Joined: May 22, 2010
    Posts: 724

    Black_Sheep
    Member

  19. saltflats
    Joined: Aug 14, 2007
    Posts: 9,067

    saltflats
    Member
    from Missouri

    Do they make a 3/8 flare plug?
    Then you could drill it for the 5/16 tubing, this would require a reflare on the line at the carburetor.
     
  20. oldsjoe
    Joined: May 2, 2011
    Posts: 2,489

    oldsjoe
    Member

    Something like this? Joe


    aaw6174038_L_03acad22-10fc-4d43-8250-a0081b54a749.jpg
     
    BJR likes this.
  21. Yes, that's what I need. But everything I'm finding with the female end to accept the fuel line has a pipe thread on the other end; it needs to be the same as a 3/8" male tube fitting.

    I asked Summit about this, they sent a 3/8" female with a pipe thread...

    I may see if I can machine/solder something together. I don't want to stack fittings even if I can find them.
     
  22. KoolKat-57
    Joined: Feb 22, 2010
    Posts: 2,733

    KoolKat-57
    Member
    from Dublin, OH

    I believe Inline Tube in Michigan has what you are looking for.
    KK
     
  23. oldsjoe
    Joined: May 2, 2011
    Posts: 2,489

    oldsjoe
    Member

    This might be better. Joe

    CARBURETOR FUEL LINE ADAPTER 5/16" female inverted flare X 3/8" male inverted

    aafitting.jpg
     
    saltflats and scotty t like this.
  24. tim troutman
    Joined: Aug 6, 2012
    Posts: 157

    tim troutman
    Member

    I have cut off the flares on lines and used a compression fitting. did not look as nice as the one above though
     
  25. I believe the link i posted is the exact part you need.

    quote from above link:
    "Use for adapting a 5/8 - 18 inverted port to a 5/16 In. domestic fuel line."

    5/8-18 is 3/8 tube nut size
     
    Last edited: Mar 15, 2019
    F&J likes this.
  26. Blue One
    Joined: Feb 6, 2010
    Posts: 9,414

    Blue One
    ALLIANCE MEMBER
    from Alberta

    Unless I’m missing what you need, I think it’s been posted above.
    1B017940-A5FA-448B-84AC-2D04C41CA670.jpeg
    https://www.ebay.com/itm/CARBURETOR...erted-flare-X-3-8-male-inverted-/232745364263

    If so, here it is again.
     
    scotty t likes this.
  27. BamaMav
    Joined: Jun 19, 2011
    Posts: 2,769

    BamaMav
    Member
    from Berry, AL

    Glad you brought this up, I'm needing to do the same thing.
     
  28. Rich S.
    Joined: Jul 22, 2016
    Posts: 232

    Rich S.

  29. Blue One
    Joined: Feb 6, 2010
    Posts: 9,414

    Blue One
    ALLIANCE MEMBER
    from Alberta

    Probably cheaper brass :D More likely the exact same fitting. :D
     
    scotty t likes this.

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