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Old 12-09-2003, 08:36 PM
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Theres two types of ignition systems points and electronic basically.

Points will be able to handle less current and voltage than electronic system so their coils are less powerful (smaller spark energy).
Points are opened and closed mechanically so they wear and have to be readjusted periodically.
Points wear from handling the electricity too.
Points have a rpm limit, at a certain rpm they cant close fast enough before the next cylinder cycle starts thats called point bounce. Its like a built in rev limiter.
Dual points can produce more spark energy than single point distributor by energizing the coil longer.
Points with stronger spring can rev to a higher rpm but they wear faster too.

Electronic ignition uses a pickup coil inside distributor that handles a tiny amount of current that in turn triggers the "ignition box" which handles the current for the coil.
The ignition box can handle more current so electronic ignition have coils that draw more current and work at full 12 volts(more powerful spark energy).
Electronic ignition has no mechanical parts touching so they dont need to be constantly readjusted from wear.
No mechanical parts mean no point bounce so they can rev higher before module cant control the individual sparks.

Points system is pretty much inferoir in every way.
Racing distributors have adjustable weights and springs in them so different advance curves can be taylored to an engine.
Computer controlled engines have electronic ignition too but only use the triggering part when the spark happens is controlled by the computer.
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