« Reply #41 on: December 12, 2011, 01:07:28 AM »
AFAIK when cars were 6 volt they didn't need a resistor. When they moved to 12 volts they found the points burned up too quickly and the coil got hot so they added a resister/wire to knock it back to 6-8 volts. For racing I expect the time involved wasn't long enough to cook a set of points.
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