Re: PACKARD 160 TUNE-UP DATA
Posted by Owen_Dyneto On 2020/7/27 21:41:26
As I said in my last response, two reasons your vacuum is low could be improperly adjusted carburetor idle mixture, or timing. And there are other reasons as well (for example, a vacuum leak) but first adjust your idle mixture to maximum vacuum consistent with the leanest mixture, then check the idle speed and if OK (less than 500 rpm) put a timing light on it and set the timing - forget "marks" and "notches", the front damper is marked degrees. Set to 5-6 degrees BTDC. Readjust your idle speed if necessary, recheck the timing again, and now see what your vacuum is.
It will make timing with a light much easier if you put a small dab of white paint on the pointer and degree line on the damper.
Forget timing specs of modern engines, not applicable.
No, the tach should not start "jumping around" as you increase to 800-1000 rpm.
PS - timing marks in degrees, from 1941 Owner's Manual.
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It will make timing with a light much easier if you put a small dab of white paint on the pointer and degree line on the damper.
Forget timing specs of modern engines, not applicable.
No, the tach should not start "jumping around" as you increase to 800-1000 rpm.
PS - timing marks in degrees, from 1941 Owner's Manual.
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