Posted by NCWayne on February 25, 2011 at 19:46:50 from (69.40.232.189):
In Reply to: Spark Plug Gap posted by TSV on February 25, 2011 at 17:51:35:
I've been reading an old manual from the late 30's/early 40's about the ignition system and how it works. It's amazing the information provided in a really clear, consise manner. That said increasing the plug gap does nothing to prevent fouling, in fact increasing the gap beyind spec actually changes the timing somewhat, believe it or not. The fouling of a plug is more a product of how "hot" the plug is. That is determined by the length of the insulator nose which in turn determines how much heat the electrode retains in order to stay hot enough to burn the carbon deposits off and prevent fouling. Below is a link to NGK's site that gives you all this information about how a plug works and then some. Hope this answers your question. Good luck.
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