Re: No spark to coil

Posted by fred kanter On 2011/8/10 17:03:15

Interesting Studebaker story. The in-line resistor in the coil wire was common if a car was not factory-equipped with a radio and thus radio resistance wires.

However I pose this: Packard Senior V8's had a resistor in the rotor, resistance plug wires and commonly resistor plugs when tuned up. Those ignition systems and similar Delco systems in GM cars did not suffer ignition deficiencies whether 6V or 12V

12V systemns are not ":hotter" any more than 12V headlights are any brighter. A 12V Delco system employs a ballast resistor which drops the running voltage to about 7, just like a nominally 6V system. The big advantage of a 12V system with high compresion engines is that it gives more power to spin the starter plus there is a relay to put the full 12V to the coil for starting.

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CORRECTION
HAS BEEN BROUGHT TO MY ATTENTION THAT PERHAPS V8'S DID NOT HAVE RADIO RESISTANCE IGN WIRES ORIGINALLY. MY STATEMETNSTILL HOLDS AS MOST HAD WIRES REPLACED DURING THEIR LIFETIMES WITH RESISTANCE WIRES AND THEY RUN JUST FINE