Straight from "the horse's mouth?" I have spoken with the tech guys at Pertronix many times. That is not what they told me, nor is it what they put in writing. You did not specify which version of Pertronix you are talking about.
Standard Pertronix: copper plug wires are fine. If a 4 or 6 cylinder engine, coil primary resistance MUST be 3 ohms or more - or the unit will fail.
Pertronix II : copper plug wires are fine. Coil primary resistance can be as low as .45 of an ohm.
Pertrnonix III: MUST use resistance wires. Coil primary resistance can be as low as .32 of an ohm.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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