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F134 Setting Timing

Discussion in 'Early CJ-5 and CJ-6 Tech' started by 65seejayfive, Jun 9, 2019.

  1. Jun 10, 2019
    mickeykelley

    mickeykelley Active Member

    Republic of Texas
    Joined:
    Oct 10, 2015
    Messages:
    1,423
    Advanced like how far?
     
  2. Jun 10, 2019
    65seejayfive

    65seejayfive Blazin’ new trails

    York, PA
    Joined:
    Apr 10, 2018
    Messages:
    202
    I upgraded my points to a Pertronix unit and in the process I read an article by Christian Hazel in 4Wheel and Off-Road and he noted that they advanced the timing from 5 degrees BTDC to 12 degrees BTDC on their Hurricane they were working on. Once I find my TDC mark I’ll finally be able to see where my engine is set and tune it accordingly. All because someone before me swapped out my crank pulley to one with no mark :banghead:
     
  3. Jun 11, 2019
    70cj5134f

    70cj5134f Member

    East Tn
    Joined:
    Aug 18, 2018
    Messages:
    658
    I run around 10btdc. I also replaced 1 of the advance springs with a slightly softer one for quicker advance. Even with my head shaved and block deck cleaned up , these things don't make any compression. I've never heard any detonation. I burn all my junk gas in this. With tank half full, I've added as much as a gallon of old gas drained out of a motorcycle or atv, that set through winter with no stabilizer. In ww2 they burnt all kind of junk in the original flat head.
     
  4. Jun 12, 2019
    mickeykelley

    mickeykelley Active Member

    Republic of Texas
    Joined:
    Oct 10, 2015
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    1,423
    I'm having an issue of when I put a load on it, like going up a hill, and I floor it to keep speed, it starts to give and go and struggle. Wondering if I should increase plug gap a little and more advance.
     
  5. Jun 13, 2019 at 12:20 AM
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    8,560
    Are you sure it's getting enough gas? If it is bucking or acting up and the timing is correct and plug gap is correct then something else might be wrong.
     
    dozerjim likes this.
  6. Jun 13, 2019 at 8:50 AM
    70cj5134f

    70cj5134f Member

    East Tn
    Joined:
    Aug 18, 2018
    Messages:
    658
    Play with your advance, leave dist loose enough u can hand turn and test drive, keep advancing a tad at a time and see where it runs best. And also test while climbing that hill, pull choke slightly, to c if more fuel helps? I'm running a spark amp, (msd), with .035-.040 gap. And if your tires are taller than 28-29 in, don't expect much acceleration up grade in 3rd gear.
     
  7. Jun 19, 2019 at 3:09 PM
    GTS Dean

    GTS Dean New Member

    Texas
    Joined:
    Feb 21, 2019
    Messages:
    36
    I had a heck of a time finding mine as well. It turned out there was a buildup of crusty oil and dust on the pulley that I needed to scrape and brush before the notch showed itself. I painted it to make it more visible and it did the trick.
     

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