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Old 05-07-2011, 01:45 AM   #2 (permalink)
gone-ot
...beats walking...
 
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...not really, because the two additional ground electrodes cast A/F-vapor "shadows" around the central electrode and thus actually reduce combustion probabilty and consistency.

...think about it -- why do 8,000+ hp drag race engines "index" each spark plug so that the ground electrode is always faced "away" from the intake valve?
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