I always assumed the inverted orientation of the ignition coil also had
something to do with discouraging moisture from gathering in the recessed
receptacle for the high tension lead. Just a thought...
Jim
British Sportscar Center wrote:
> A few years ago, I e-mailed another list to inquire if anyone knew why coils
> were so often mounted upside-down. Someone with an electrical engineering
> background replied that coils were oil-filled in order to provide cooling
> and that the upside-down orientation was intended to ensure that there was
> always oil around the contact end of the coil which, he said, was where most
> of the internal heat was generated. Made sense to me (and I've only once
> encountered a coil that leaked).
>
> Lawrie
> British Sportscar Center
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