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OK I just read the front page about "Squish and Quench" and it sounds like pseudo-scientific mumbo-jumbo to me.
It seems that if this concept worked, we'd see spark plugs with these grooves in them.
Hey, next time someone does a tune-up, take a Dremel and cut a groove in the first 1/4" of spark plug threads!
Not to say it can't be true, but I can't help but think of the old "if it were a simple solution to increase MPG, wouldn't the major manufacturers be doing it already?"
Are there any racing series where this is done?
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