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Tuning HEI

Discussion in 'Early CJ5 and CJ6 Tech' started by tgregg, Sep 21, 2005.

  1. Sep 21, 2005
    tgregg

    tgregg Member

    Oak Hills, CA...
    Joined:
    Apr 14, 2005
    Messages:
    529
    I bought the adjustable Vacumn and the weight kit for my HEI on my 225.
    I downloaded the guys deal on tuning the HEI but it really seems to run just fine with the stock weights and the vacumn plugged.
    Is it worth the hastle of doing all he suggests.
     
    tgregg, Sep 21, 2005
    #1
  2. Sep 21, 2005
    willys59cj5

    willys59cj5 Sponsor

    Gilroy, CA
    Joined:
    Jun 1, 2005
    Messages:
    660
    I'd run a vacume line from the carb or manifold...that will give you more umph than going through the hassel of changing the wt's ect. With a 225 I doubt you would notice the increase in horsepower unless you had it all pumped up.
     
    willys59cj5, Sep 21, 2005
    #2
  3. Sep 21, 2005
    DanStew

    DanStew Preowned Merkin salesman Staff Member

    Lexington, South...
    Joined:
    Sep 22, 2002
    Messages:
    4,585
    the stock weights are supposidly thebest to keep for the HEI. the oter weights are lighter and that means the torque chagnes to goto the higher RPMs. But sometimes you dont know if the springs in the HEI are not stock and maybe swapped in before the rebuilder gets it. If it runs fine with the old springs i would keep it like that.
     
    DanStew, Sep 21, 2005
    #3
  4. Sep 21, 2005
    AKCJ

    AKCJ Active Member

    Fairbanks, Alaska
    Joined:
    Aug 12, 2003
    Messages:
    1,035
    I've run my HEI for years with the stock weights and no vacuum line. Runs pretty good. I'm not sure the vacuum advance will get you much power, but I think you could get better gas mileage.
     
    AKCJ, Sep 21, 2005
    #4
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