RE: ignition timing

[Jim Grammer <jimg@domain.elided>]

RE: ignitions

>Contrast the way an MSD system fires (immediately) to the way a
>conventional ignition system works.  In a conventional system, the points
>ground the primary coil circuit when they close.  When the points *open*
>they "break" this primary coil circuit causing the secondary coil circuit
>to send a high voltage spike to fire the park plugs.  The difference
>between the two types of systems then would be that the conventional 
system
>fires later when the points open verses the MSD system begriming the 
firing
>sequence sooner when the points close.

Sounds right to me, John. The points opening collapses the magnetic field 
in the primary, which induces the big zap out the secondary. Electricity 
and magnetism move mighty fast, but that process doesn't happen instantly.

Jim