Quote:
Originally Posted by ScubaChief60
So that when the ballast resistor is cold, I'll get the full 6.7 volts to my coil and as it heats up then is reduced to I recall between 3 and 4 volts to the coil.
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That is not correct. When cold will be about 3.5 volts to the coil. As the resistor heats up it will drop voltage only a few tenths of a volt. Then when engine running, points open 20% of the time, will jump up to about 4 volts.
There are systems that will give full battery voltage to the coil, but that requires separate wiring to by-pass the resistor during cranking.