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When converting an early model distributor from points to electronic ignition with, let's say, Pertronix, do you have to replace the coil with an aftermarket unit? I guess what I'm trying to say, are they the same?
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--carlos
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It would depend if the Petronix required 12v vs the 9v points require. Some coils have a built in resistor for the voltage drop.
If the voltage matches, you can use the normal coil.
Edit** Determine the voltage requirement for the petronix. Measure the voltage on both + and - terminals of the coil. If you have 9v on the negative post and 12v on the positive, you have an internal resistor. If you have 9v on both posts, your resistor is in the cars wiring.
So, if you only see 9v at the negative post, you may need a non-resistor coil. If you see 9v on both posts, you can run the existing coil but you will need to run a 12v source from the ignition switch.Last edited by homealone; 07-02-2014, 11:11 AM. -
What voltage does a stock replacement coil have?--carlos
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Well, after re-reading your post, it seems as though the only way to know is to test a stock coil.--carlos
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They are usually marked with something like "internally regulated" or "internal resistor" but that usually rubs off soon after it's installed.Originally posted by projectPONY View PostComment
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