[Mgs] 80 B Timing question

[Mark J Bradakis]

>  I noticed that the timing mark moves as a
> function of engine speed.  The faster the engine speed, the
> more advanced the spark. The slower the less advanced. 

The distributor has a mechanical advance system built in.  Using weights
and springs it rotates the plate for the points to give more advance at
higher revs, less at lower.  This is independent of any vacuum assisted
motion, as you noticed.

mjb.