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Customs Gas line... How close is too close ?

Discussion in 'The Hokey Ass Message Board' started by ahshoe, Dec 6, 2017.

  1. ahshoe
    Joined: Sep 12, 2012
    Posts: 428

    ahshoe
    Member
    from Eastern IA

    I know that there is no rule of thumb but I had to redo my exhaust from a round glass pac design to a oval design muffler now my fuel line is about 3/4" from the muffler at one point. It is a steel fuel line, not rubber. Should I be concerned. Anybody else close to this?
     
    Last edited: Dec 6, 2017
    chryslerfan55 likes this.
  2. Mr T body
    Joined: Nov 2, 2005
    Posts: 1,207

    Mr T body
    Alliance Vendor
    from SoCal

    I wouldn't be at all comfortable about this. At the very LEAST I would put a silicone insulating sleeve on that section of hardline if for no other reason than to keep the fuel cooler. Then there's the whole explosion potential.
     
    lothiandon1940 likes this.
  3. squirrel
    Joined: Sep 23, 2004
    Posts: 37,466

    squirrel
    ALLIANCE MEMBER

    If you have to ask, it's too close!
     
  4. i would move it

    maybe i'm being paranoid....there is a spot farther back on my `36 where the steel fuel line is about 3 inches from the exhaust , i have a heat shield on it
     
    lothiandon1940 likes this.
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  5. Jalopy Joker
    Joined: Sep 3, 2006
    Posts: 18,338

    Jalopy Joker
    Member

    yes, add shield of some type of heat resistant material
     
  6. Happydaze
    Joined: Aug 21, 2009
    Posts: 408

    Happydaze
    ALLIANCE MEMBER

    as well as shields etc add something sacrifical, like zip tie, as a tell tale - hopefully you'll have learned something is getting too hot before it's too late!
     
    lothiandon1940 and Max Gearhead like this.
  7. Engine man
    Joined: Jan 30, 2011
    Posts: 3,043

    Engine man
    Member
    from Wisconsin

    What fuel system do you have? With a carburetor, the flow normally stops and starts as the needle valve opens and closes so the fuel sits in the line and heats up. With a bypass system like fuel injection or a bypass type regulator, there is constant flow so the fuel won't get very hot in a short distance.
     
  8. Paul
    Joined: Aug 29, 2002
    Posts: 13,630

    Paul
    Editor

    Imagine getting off the freeway after a hard run in August, you pull into an air conditioned restaurant for a bite to eat.
    While you are chilling in comfort that fuel line out there is literally boiling away.
     
    lothiandon1940 likes this.
  9. a50merc
    Joined: Apr 20, 2008
    Posts: 843

    a50merc
    Member

    Oh my God are you Trying to Blow up Your Car Thats the way to do it
    shit I had a problem like That between my Electric Fuel pump & Tail Pipe
    and I did not like because it was about 3" from pipe & Moved to about 6".

    Just my 3.5 cents

    Live Learn & Die a Fool
     
    olscrounger likes this.
  10. Kiwi 4d
    Joined: Sep 16, 2006
    Posts: 1,887

    Kiwi 4d
    ALLIANCE MEMBER

    Exactly as Squirrel said , you obviously have concerns. So the fuel line needs to be shifted. No amount of shielding will work in 3/4".
     
    lothiandon1940 and olscrounger like this.
  11. gene-koning
    Joined: Oct 28, 2016
    Posts: 466

    gene-koning
    Member

    You all haven't looked at how close the fuel lines run compared to the exhaust under many newer cars have you? Gene
     
  12. dan31
    Joined: Jul 3, 2011
    Posts: 655

    dan31
    Member

    Moving it might be a P.I.T.A but so is insurance paperwork and hospital beds.
     
    lothiandon1940 likes this.
  13. FrankenRodz
    Joined: Dec 20, 2007
    Posts: 573

    FrankenRodz
    Member

    Just sleeve it! Heat sleeve protects higher heat than will ever come close to the line. I’ve been sleeving my fuel lines for years, and I haven’t blown up yet! Everything in the engine bay of my latest build is heat protected, wether it’s needed or not.
     
  14. Mike51Merc
    Joined: Dec 5, 2008
    Posts: 3,656

    Mike51Merc
    Member

    Putting aside the explosion worries, there are still potential vapor lock and combustion efficiency issues with warm/hot gasoline. Shield or move.
     
    dan31 and 57JoeFoMoPar like this.

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