Originally posted by Mo
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I'll add this though: resistors are necessary only on coils of insufficient internal resistance in the first place. We know A-4 electronic ignition requires coil resistance of around 4Ω so if we consciously decide to buy a deficient 3Ω coil we'll need a resistor to make up the difference. If we select a 4Ω coil there's no need for extra parts - - and extra connections.
Joe's comment is spot on that Pertronix's own coil didn't pass muster despite their advertising that it was "the perfect match for their ignitor ignition." Maybe it is on your Chevy but no way on our A-4.
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