At 23:13 5/13/2000, Mark Rokus wrote:
>Yes, Pertronix are Hall effect based.  A hall sensor turns on based on the
>strength of the magnetic field that they see, thus, it is logical to
>conclude that you can effect the dwell by changing the distance from the
>collar (with the magnets in it) and the sensor.  ie... the closer the
>pick-up is to the collar (magnets) , the longer the sensor will see
>it.  Obviously, if you get too much of a gap, the pulse will be shorter.

It's logical, but it's not so...decreasing the gap will do nothing (until
you get physical interference), and decreasing it will perhaps make the
timing a little late -- or a bit mushy (until the thing stops working at
all).  But the sensor only provides information to the control module; it
has no direct effect on the output.  Once the control module knows when the
spark is wanted, it generates a pulse without further regard for the
Hall-effect sensor.

david
David Beierl - Providence, RI
  http://pws.prserv.net/synergy/Vanagon/
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