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T77911S T77911S is offline
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Join Date: Oct 2006
Location: MYR S.C.
Posts: 11,146
Originally Posted by LJ851 View Post
One important thing that happens when you reverse the polarity of the wires going from an electronic distributor to the MSD is that it dramatically affects rotor phasing in relation to the distributor cap. It shifts the trigger point between the leading and trailing edge of the reluctor.

It's enough that my car won't run well at all with the wires one way because the rotor is too far away from the terminal and runs perfect with the rotor dead center on the terminal the other way.
mine changed a LOT. no numbers and it did run. man did it sound funny. RPM's pretty hi and it sounded very "thin" or tinty.

you cant really think of it as polarity, its more AC power in your house or for those that no electronics, its like a balanced signal.
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Old 06-30-2014, 04:05 AM
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