Good Morning Steve "John T, you want some of this! " Sorry I don't have an answer grrrrrrrrrr my bad Im too old for this lol but will offer the following non technical faded memory best guess:
Like you Ive heard and know this to be true, ultra high compression racing engines typically require higher energy higher voltage capable ignition systems, but WHY I cant explain.....Old radio vacuum tubes created a vacuum inside to allow for electron emission off a heated cathode up to the relatively cooler plate. OPPOSITE TO A VACUUM, as compression increases the density of fuel/air molecules in the compression chamber increases and that SOMEHOW?? makes it more difficult to cause electrons to arc jump across the plug gap ?? Also perhaps it has something to do with the ionization of air in the gap becoming more difficult if the density (higher compression) increases ?? DARN IF I KNOW
Professor Jim is more current in this area maybe he knows????????????
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