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  •  » Fuel Line

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    3/11/2019 7:44 AM  #1

    1fststang
    I FYI 24-7

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    Registered: 6/02/2013
    Posts: 419

    Fuel Line

    I'm working on fuel line from an Edelbrock Mechanical pump up to my new Quick Fuel Dual line 4 barrel carb.  I have ran 3/8" stainless lines from tank to engine compartment with 1 rubber hose connecting the two long pieces right behind the driver side torque box like the factory did.

    I was putting together the 3/8" stainless line to run from pump to carb thinking near carb I would flare a partial nipple to hold a 3/8" rubber line on then connect to a filter then to a nipple on the dual line set up.

    Now I'm second guessing if that is the best way to plumb this.

    I can buy a fuel filter that attaches right to the dual line set up from Jegs or Mr Gasket that would eliminate the second piece of rubber hose. I could also look for a fitting that would allow me to run my hardline(3/8") directly to the filter.   That would eliminate any rubber hose on the engine.

    Another option. should I consider just running braided line from pump to filter then to carb?

    What have you guys done?  Any pics ?



     

     

    3/11/2019 8:29 AM  #2

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,526

    Re: Fuel Line

    I prefer to remove as much rubber from the fuel system as possible.  My pump to carb line has none.  I used adapters and fittings as needed to make it unnecessary.  Also, its how the factory did it.

    You need a piece from the main line to the pump to account for engine movement.  A short section at the tank to go from the pickup to the main line.  I wouldn't worry about the little piece used in the factory two piece fuel line either.  In general I shoot for 12" or less of rubber line in the whole system.  That's the NHRA guideline for racing as well. 

     

    3/11/2019 8:34 AM  #3

    1fststang
    I FYI 24-7

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    Registered: 6/02/2013
    Posts: 419

    Re: Fuel Line

    Sounds like a plan.

    I can attach filter directly to the dual line if I get one with the female AN on carb side.  I can double flare my 3/8" line and run the line across the front of the engine near timing cover then up to filter.  I guess I need to see what kind of adapter I need to go to a -6AN.  Seems like many online use a sleeve and say one time use.  I need do research that a little more.

    I'm thinking this will make a very clean install and no hose clamps to mess with if I need to pull carb just a tube nut and the filter. 

       •Thread Starter
     

    3/11/2019 11:27 AM  #4

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
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    Re: Fuel Line

    There's an adapter for just about anything.  Sometimes you may get stuck and need to use two, but there's always a way to do it.  There's definitely a way to go from -6 AN to 3/8" inverted flare (Which is a 5/8-18 thread on the tube nut).  Regular inverted flares are 45 degree, whereas AN flares are 37 degree, so be mindful of that. 

     

    3/11/2019 5:50 PM  #5

    50vert
    Senior 24-7 FYI Addict

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    From: QLD Australia
    Registered: 4/01/2013
    Posts: 1,428

    Re: Fuel Line

    If you can do an AN flare, no need for an adapter. One less leak point.

    "Those telephone poles were like a picket fence"
     

    3/11/2019 5:59 PM  #6

    6sally6
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    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,874

    Re: Fuel Line

    I vote "needless worry".

    Sure there is a "possibility" that the rubber could come loose and spray fuel all over your red-hot headers "possibly" bursting into flames and destroying all your hard work and "possibly" exploding into a massive fire ball with you and several innocent motorists totally engulfed in molten steel, plastic, and of course rubber debris.

    Is it best practice to limit or eliminate rubber hose from the fuel line equation?! Yep.  Does the factory have any rubber hose on their fuel system?!  Nope. Does a large portion of so-called- "hot  rodders", shade tree mechanics, "jack-leg mechanics" and home "hobbyists" have rubber hose intergrated into their fuel lines?!  Uh-huh
    .
    In fact...alot of those after market fuel filters canisters and the "sexy little glass" capsuled  filters are made so they can be installed with......wait-for-it....short sections of rubber hose and hose clamps.
    For many-many years hot rods were built with a  multiple carb set-up (3/4/6/even 8 carbs) most all plumbed with short sections of rubber hose.

    I guess the ' least amount of rubber hose' incorperated in a fuel system  the better.

    I mean....Whats the odds of a couple  of short pieces of rubber hoses  springing a leak.....?!
    (see above)

    6sally6
    Nothing like "muddying-the-water" I always say!!

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    3/11/2019 6:22 PM  #7

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,299

    Re: Fuel Line

    Mine was solid 3/8” line to the driver side front bowl inlet. I used a 5/16” hard line to connect the two bowls on the passenger side.

    All this was great until about the third jet change. Then I cut the tubing about 5” in front of the carb inlet and stuck a 2” length over hose and two clamps across the cut.  Of course put small bubble flare on each tube end.

    1969-70 Boss 429 filter fits threads in driver side of carb bowl and has 3/8” hose barb.  That one is my favorite.

    Just be sure to consider maintenance.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    3/12/2019 7:09 AM  #8

    1fststang
    I FYI 24-7

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    Registered: 6/02/2013
    Posts: 419

    Re: Fuel Line

    All good advice.  On my coupe I have a SS line from pump up to carb with two short pieces of hose connecting an inline filter then to the dual line on the passenger side.  All behind the distributor.
    On the fastback trying to keep it clean and functional.
    I don't have a lot of room from the dual line inlet to front of engine so opting for a compact filter.  The below pics are the filter that should connect straight to the -6 fitting on my dual line then the adapter to take my 3/8" SS line to an AN fitting. For service I should be able to just disconnect at the Female fitting on inlet side of filter.  I think this is what I'm going to try.  If that don't work i'll go hardline filter and two short pieces of hose.



      

       •Thread Starter
     

    3/12/2019 8:15 AM  #9

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,526

    Re: Fuel Line

    On an Edelbrock carb I don't need to touch the fuel line to change jets or rods, just sayin'...

    My concern isn't that the rubber would fail from it being rubber, but I do have some concern that it would fail from age.  I'm also going to guess that the ethanol in the fuel doesn't do rubber any favors, so the time it used to take the rubber to dry rot is probably a lot less now that its in constant exposure to a fuel solution containing at least 10% of a dry solvent. 

    Not to say that rubber is inherently bad, just one of those things where if I can avoid it by spending 20 minutes shopping for fittings that's what I'm going to do. 

     

     

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