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  1. 1911

    Leaning out fuel mixture when driving into higher altitude

    It doesn't have to be complicated. The distributor turns clockwise, so loosen the clamp at the bottom and turn it counterclockwise a little at a time. If you have a dial-back timing light, use that to advance the timing another 3 to 6 degrees BTDC. When I lived just west of Denver (6,000'...
  2. 1911

    Leaning out fuel mixture when driving into higher altitude

    You'll get the most bang for your buck by far, by just advancing the ignition timing once you get to Colorado. It makes a lot more difference in drive-ability than changing jets, and is easier to do.
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