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Post by sc397 on Mar 11, 2015 10:59:25 GMT -8
Why spark plug threads were meteric from the begining of time... I Googled it of coarse. It kinda goes along with the wonderment of the 3/4 race cam. During the early 1900s, France was the dominant manufacturer of spark plugs. Frenchman, Albert Champion was a bicycle and motorcycle racer who immigrated to the United States in 1889 to race. As a sideline, Champion manufactured and sold spark plugs to support himself. In 1904, Champion moved to Flint, Michigan where he started the Champion Ignition Company for the manufacturing of spark plugs. He later lost control of his company and in 1908 started the AC Spark Plug Company. -From: inventors.about.com/
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Post by 69Rebel on Mar 11, 2015 19:27:47 GMT -8
I had always kinda wondered why spark plugs were metric even on a US built motor. Guess I know now.
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