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Re: Re: Re: Re: Re: Super M 6v to 12v conversion
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Posted by Bob M on June 06, 2000 at 11:05:05 from (192.232.120.194):
In Reply to: Re: Re: Re: Re: Super M 6v to 12v conversion posted by The Red on June 06, 2000 at 09:39:52:
Hey Red - a clarification: The primary connections on the coil are the two low voltage (the + and -) terminals. The two secondary connections are the high voltage output nipple, and the outer steel can that encloses the coil. When wiring up a coil primary, the + and - terminals should be connected to like polarities the electrical system. I.e. if the system is negative ground, the coil + should be fed from the battery +. Conversely a positive grounded system should have the coil - fed from the battery -. So much for how it should be done... As a practical matter, the coil will work fine wired up either polarity (I've run 'em successfully both ways for 25+ years). My understanding is only when you need absolute maximum ignition performance (eg very high RPM on a high compression engine) does coil polarity become significant - somehow impacts arc voltage and spark plug electrode erosion I recall. Naturally this is not an issue for 4 cylinder Farmall motors governed to 1,575 RPM! Bottom line: Wire the coil up either way - it'll work fine! Bob
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