View single post by SpeedyMitch
 Posted: 03-09-2011 09:18 pm
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SpeedyMitch



Joined: 12-17-2009
Location: Hailey, Idaho USA
Posts: 83
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 I've been playing with the timing in my stock '73 and have some observations that others may be able to confirm or deny.

5-degrees before TDC - lumpy idle at about 750 RPM. Some low-end torque but seems flat after about 5k RPM.

10-degrees - idle becomes smooth at about 900 RPM. Less low-end but better response at highway speeds.

15-degrees - high idle (can't seem to bring it down with carbs), no low-end, no better at highway speeds.

Just about everthing I have read says 10 to 15 degrees is 'best' but that has not been my observation.

Note: all observations meticulously measured using my seat-o-the-pants-o-meter.