HEI ignition module

I'm using that as an example. If you cannot understand the concept I have no help for you. You on the other hand seem to like to pick at things

67Dart273 said

other than the additional RFI/EMI radiation by the NEG coil wire, the long length of the wire between the "switch" and the coil, and the entire length of the return path can degrade spark performance This can get even more important with such things as CDI

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If you can't read the post and ascertain "which wires" I'm referring to, then read it again