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Old 08-16-2020, 09:21 AM   #15
Purdy Swoft
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Join Date: May 2010
Location: Alabama
Posts: 8,090
Default Re: measure gap between rotor and plug posts in distributor cap

The spark gets hotter when it jumps a gap . Just a way to get hotter spark for free if you want it . Of course an original model A doesn't necessarily need hotter spark . Hotter spark can be of benefit with modified engines .
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