6B or 10B Timing on '74 302 ?

Discussion in 'Technical' started by 1972Grabber, Apr 23, 2006.

  1. 1972Grabber

    1972Grabber Always Broke

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    Please look at the chart below. This scan is also in my picture album in my gallery.

    Can someone tell me why Ford went to 10-12b degrees ignition timing for the 1974 302 and then went back to the 6B? Does this make sense to anyone else or was this just an attempt to retard performance for emissions? Should it be okay to run the 6B with no problems?

    mmmmm.jpg
     
    1972Grabber, Apr 23, 2006
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  2. grbmaverickmo

    grbmaverickmo That Maverick Guy

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    If it doesn`t rattle the valves at ten put there
     
    grbmaverickmo, Apr 23, 2006
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  3. maverick1970

    maverick1970 MCG State Rep

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    Those were the early emmisions years they were probably messing with cams
     
    maverick1970, Apr 23, 2006
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  4. don graham

    don graham MCG State Rep

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    try it at 6. then try it at 10. see which it likes better. probably won't make a lot of difference. see which one gives you better gas mileage without hurting performance. you won't hurt the engine with either one.may have to change the idle speed a little, but that's it.:)
     
    don graham, Apr 23, 2006
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  5. T.L.

    T.L. Banned

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    I run 12 degrees BTDC initial timing. Gives more low RPM torque and better throttle response. As long as you don't have pre-ignition happening, it's perfectly fine. Never exceed 38 degrees total timing...
     
    T.L., Apr 23, 2006
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  6. 1972Grabber

    1972Grabber Always Broke

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    I will try it at 6 and 10 and probably every degree in between to see what it likes. :) Thanks for all the suggestions/help. :tiphat:
     
    1972Grabber, Apr 23, 2006
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