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Coil polarity Positive ground car, how is the coil wired?
Bob Giles, thanks |
Re: Coil polarity |
Re: Coil polarity Don't know why the link isn't working...let me check it and try again.
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Re: Coil polarity |
Re: Coil polarity Quote:
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Re: Coil polarity Here is a handy tool to determine if the coil polarity is correct on your Model A.
https://www.santaanitaas.org/wp-cont...pful-Tools.pdf Tom Endy |
Re: Coil polarity If both spark plug electrodes are pointy then the polarity doesn't matter. The electrons will jump easier from a pointed electrode. The miniature spark plugs used on model airplane engine in the 1930's and 1940's have both electrodes pointed and the instructions written for how to hook up the coil say that the polarity doesn't matter. The polarity also determines which point has the metal eroded and which point has the metal deposited. This happens over time and happens more with a condensor that is not the correct microfarads. If the condensor is the right size there should not be any metal transfer between the points.
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Re: Coil polarity Thanks everybody.
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Re: Coil polarity Quote:
The condenser or capacitor's capacitance value it chosen to match the most efficient frequency of the coil's output capability during the induction cycle. It can vary a little and still function OK but it can't vary a lot or efficiency is degraded. A good condenser will almost eliminate any arcing across the points as they open. The smaller the amount of arcing, the longer the points will last. The little NuRex tool is a very handy tool for quick ignition system checks. It works for both polarity checks and just plain spark checks. |
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