Posted by Steve@Advance on July 09, 2016 at 20:55:44 from (107.203.134.67):
In Reply to: Ignition Coil 12 volt posted by gdtractor on July 09, 2016 at 19:48:30:
You will gain more in the way of consistent, reliable spark with the electronic conversion than with a performance coil.
If you have ever watched points operating on a scope, you will see the points "bounce" each time they close. That is wasted saturation time, and the points are arcing during the bounce cycle. Add to that any wear in the distributor shaft bushing and the gap will vary, which will affect dwell time and ignition timing.
When viewing an electronic switch, the pattern is a nice, square wave pattern. It is all off, all on, nothing in between.
A coil's resistance determines the amperage it pulls. Too low resistance and the amps are more than the points or electronic switch can handle. The coil is only going to make as much voltage as it takes to jump the gap to ground.
There are higher power coils, but they are designed to jump a wide gap plug, intended to better light a lean mixture for better fuel economy, not necessarily for better performance. There is a down side to the high powered ignitions, they are hard on plug wires, and they tend to find other places to go to ground, like through the center of the rotor, or follow any trace of moisture.
There are extreme performance ignition systems. But they are more for high RPM applications, which has no benefit for a tractor engine, unless you have done some serious modifications. The only advantage they have is some have a programmable rev limiter.
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