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Necessity Of fuel return line

Discussion in 'Early CJ5 and CJ6 Tech' started by JeepsRcool, Aug 3, 2007.

  1. Aug 3, 2007
    JeepsRcool

    JeepsRcool Member

    Garden Grove, CA
    Joined:
    Aug 31, 2006
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    128
    I am about ready to plumb my fuel lines, I have a Holley red electric pump 98 GPH 7psi max and a Holley TA470 carb. main question is about fuel return. I have two tanks underseat and rear tank, with in between the seat selector switch. So will I really need a fuel return line? And if so how would i set it up to work with both tanks? Thanks
     
    JeepsRcool, Aug 3, 2007
    #1
  2. Aug 3, 2007
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
    Joined:
    Mar 4, 2003
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    Re: Necesity Of fuel retrun line

    With the electric pump you will need a return or chance killing the pump prematurly. If you want it to return to the tank your pulling from you will need another mech switch, or if it's electrical, tie the two together. I have also seen folks with a single tank feed to the engine and pump from the '2nd' tank to the primary. That makes what your doing easier as well.
     
    Warloch, Aug 3, 2007
    #2
  3. Aug 3, 2007
    JeepsRcool

    JeepsRcool Member

    Garden Grove, CA
    Joined:
    Aug 31, 2006
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    Re: Necesity Of fuel retrun line

    thanks, now i will hunt for another 3/8 mech switch.
     
    JeepsRcool, Aug 3, 2007
    #3
  4. Aug 3, 2007
    JeepsRcool

    JeepsRcool Member

    Garden Grove, CA
    Joined:
    Aug 31, 2006
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    128
    Re: Necesity Of fuel retrun line

    Ok i found a switch, but how do i do it at the carb, regulator with return or filter with return? thanks.
     
    JeepsRcool, Aug 3, 2007
    #4
  5. Aug 3, 2007
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
    Joined:
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    5,474
    Re: Necesity Of fuel retrun line

    Use a Reg with return to the switch - then splits to the tanks. FWIW - you can use the setup to pump the fuel from one tank to the other via return lines if needed...
     
    Warloch, Aug 3, 2007
    #5
  6. Aug 3, 2007
    WYOMIKE

    WYOMIKE Oct 1971 pic

    Parkman, Wyoming
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    Jan 22, 2003
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    Re: Necesity Of fuel retrun line

    One time when I wanted to do something like this I went to the junk yard and for $5 I got a elect. sol. valve from a old Ford PU. By switching one switch on your dash, you could transfer both the tank you wanted to pump from and the return line to that tank you were pumping out of. Pretty simple and easy to use. I think it was much easer then trying to plumb up 2 mechanical ones. Just my thoughts.:beer:
     
    WYOMIKE, Aug 3, 2007
    #6
  7. Aug 4, 2007
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    cordele, Ga.
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    Re: Necesity Of fuel retrun line

    Electric fuel pumps? When you turn on your switch and you hear the pump clicking and then slow down and stop, that means it is demand controlled. You won't need a return line. Only puts out what you use. Hope this helps.
     
    Walt Couch, Aug 4, 2007
    #7
  8. Aug 4, 2007
    JeepsRcool

    JeepsRcool Member

    Garden Grove, CA
    Joined:
    Aug 31, 2006
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    128
    Re: Necesity Of fuel retrun line

    its a holley race carburetor pump, on or off. but that is a good idea just not what i have.
     
    JeepsRcool, Aug 4, 2007
    #8
  9. Aug 4, 2007
    junkfood

    junkfood Member

    Casa Grande,Az.
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    Oct 23, 2005
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    Re: Necesity Of fuel retrun line

    FWIW, you really don't want to tie the 2 tanks together or rig to pump from one to the other. If I remember correctly, it is illegal on anything other than diesel fuel. The only legal way to do multi tanks is to switch between them.
    Keith
     
    junkfood, Aug 4, 2007
    #9
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