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Thread: Timing Specs?

  1. #1
    THE She-Jeeper TheRenegade's Avatar
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    Default Timing Specs?

    Hey guys:

    Need some info....
    Have a 85 CJ7 258 with the Webber and the HEI upgrade....most imprtant: NO EMISSIONS stuff left! ECM, wires, egr, etc are ALL GONE!
    Anyone know what the timing specs should be?

    Thanks


    PS I'm going "QQ" tags here in NJ.....so, no more inspections.
    Getting my morning coffee at the mud truck. Don't ever talk to me until I've had my morning coffee. Seriously, don't. I'm venomous. @BronxZooCobra.

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    Senior Member HillBillE's Avatar
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    Hey Renegade, I just did the HEI swap and put in an MC2100 carb. I found all kinds of stuff on timing, anywhere from 2* BTDC up to 12* BTDC.

    Mine ended up at 4*. Most things I read said between 8 and 12*, not necassarily true.

    Make sure that the vacuum dvance and mechanical advance work. Mine didn't (bought the HEI from 4WDHardware, part #DA12) I had o replace the vacuum pot, mechanical advance springs, and electronics inside my Dizzy. Burnt a valve and heated up the piston enough to egg out the wrist pin hole, all becuase of detonation, or "ping", from the timing not advancng properly. Just a heads up.

    I'd start around 4 or 6* BTDC, and adjust from there. You don't want any pinging/knocking under load or at high RPM's.


    btw: All my emmissions and the EGR are removed/plugged also.


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  3. #3
    THE She-Jeeper TheRenegade's Avatar
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    Hey HillBillE:

    Thanks I'll try those numbers.

    Let ya know later. Thanks

    Maureen
    Getting my morning coffee at the mud truck. Don't ever talk to me until I've had my morning coffee. Seriously, don't. I'm venomous. @BronxZooCobra.

  4. #4
    THE She-Jeeper TheRenegade's Avatar
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    Hey BillE:

    Ended up at 10.

    Thanks
    Getting my morning coffee at the mud truck. Don't ever talk to me until I've had my morning coffee. Seriously, don't. I'm venomous. @BronxZooCobra.

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    Junior Member CJ Chet's Avatar
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    12 degrees for "power" tuning, 9 to 10 for emissions.
    '86 CJ7, 265 CI, TF999, Weber 38, DUI, Borlas, 4"BDS.
    '04 TJ Sahara - Lot's of stuff pending!
    '00 TJ Sahara (Chick Jeep - wife's)!
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