Quote:
Originally Posted by 30 Closed Cab PU
I've read that some like running 6v coils with the external resistor on 12 V systems.
Power dissipation of teh coil is substantially reduced since the power in the circuit is shared by the resistor. The benefit is the coil runs cooler and extends the coils life.
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Some may want to run an original Ford script coil , Others may just not want to spend the money for a new coil . If running a six volt coil on twelve volts a resistor mounted at the coil connection will be needed or the coil will burn out . The three Ohm coil will give hotter spark than the six volt coil being used on twelve volts with a resister . I run a three Ohm coil on twelve volts and my coil doesn't get hot . I use the Pertronix three Ohm Flamethrower coil . The Flame thrower coil is a performance coil that will add power that can be felt . The spark comes from the coil . I'm not saying that a performance coil must be used . its just a matter of choice . The model A needs all the help it can get !!!