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Thread: obs v6 to lq4 fuel system questions

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  1. #1
    ff_jeff Guest

    obs v6 to lq4 fuel system questions

    I am going to have a return rail for the fuel. Whats the cheapest/ easiest way to run the fuel lines?

  2. #2
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    cheapest.... use some 5/16: fuel line and run a return line to the filer neck to gas tank

    easiest..... let a quality shop like DB Rods do a nice fuel system for you... they do awesome work...


  3. #3
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    Quote Originally Posted by TurboMic View Post
    cheapest.... use some 5/16: fuel line and run a return line to the filer neck to gas tank

    easiest..... let a quality shop like DB Rods do a nice fuel system for you... they do awesome work...

    Yeah what he said
    30' Ford Model A Tudor Sedan - Custom chassis - Big bore LS2 - twin B76's - Glide - 9" w/ 3.07 gears - 30" DR tire - 2k lbs cruiser

  4. #4
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    You might be able to use what you already have? Add on some high pressure fuel line with a quick fitting to the rail.
    2006 Superior Blue Trailblazer SS AWD, Stock as a rock

    Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).

    Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning

  5. #5
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    @ mic

    what kind of fuel pump are you using? similar to stock? run your lines down the basic location that it would on a newer style truck and then use the return fitting on top of the gas tank or, do what Mic said and plumb it into the filler
    Quote Originally Posted by DamnYankee View Post
    lol...I wish you would never paint your truck...I bet it bugs them that much more that a primered up truck just soggied his Wheaties. good job buddy
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  6. #6
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    What year is your truck with the V6? If 96-up it already has a return line. If not just use the sending unit and pump from a 96-98 and run line to the fitting on the new sender unit.

  7. #7
    ff_jeff Guest
    Yes it is a 97. It does have a return. I meant what fittings/ other things, will I need to connect the v6 fuel lines to the lq4 rail. It also will have a walbro.
    Last edited by ff_jeff; 12-16-2009 at 11:02 PM.

  8. #8
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    I believe russell fittings makes a fitting that will allow you to push it on the stock gm fuel rails and be left with a female or male -6 end.
    Since the stock v6 fuel lines probably have 5/16" and 3/8" pipe or straight thread on them, you might just want to cut them off and use some -6an to hardline compression fittings.
    Then attach the rail fittings to the new ends on the feed/return lines.




    ding ding ding, everyone to their corners

  9. #9
    ff_jeff Guest
    Quote Originally Posted by farmtruc View Post
    I believe russell fittings makes a fitting that will allow you to push it on the stock gm fuel rails and be left with a female or male -6 end.
    Since the stock v6 fuel lines probably have 5/16" and 3/8" pipe or straight thread on them, you might just want to cut them off and use some -6an to hardline compression fittings.
    Then attach the rail fittings to the new ends on the feed/return lines.




    ding ding ding, everyone to their corners
    Like this?
    Retrofit LS1 LS6 Fuel Rail Adapter Fittings Pair AN #6:eBay Motors (item 380171264846 end time Dec-23-09 10:20:28 PST) So get 2 of these, and what do I put on the stock lines once they are cut?
    EDIT: or would these be better? Retrofit LS1 LS6 Fuel Rail Adapter Fittings Clamp On:eBay Motors (item 120504317857 end time Jan-08-10 13:40:29 PST)
    Last edited by ff_jeff; 12-16-2009 at 11:11 PM.

  10. #10
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    i just got done plumbing my fuel system on my 82 c10 and i used this russell adapter Russell Performance 640850 - Russell Fuel Rail Fitting Adapters - Overview - SummitRacing.com i ran new fuel lines and AN fittings it was not to bad. i would not reccomend to go cheap on the fuel system. for the hard line you cut you can use this Summit Racing SUM-2200075 - Summit Racing® AN to Tube Adapter Fittings - Overview - SummitRacing.com i had to use one and it seems to work well.
    1982 c10 lsx swaped, NP tuned, true duals, 4:11s, trutrac, e-fans, CAI

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