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Old 06-11-2013, 09:41 AM   #4
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In the stratified fuel/air charge environment of a DI cylinder, it's not likely that indexing or profiling will help at all. And, obviously, you can't face the electrode toward the piston in a DOHC engine like this, since the plug is centered vertically at the top of the cylinder. I suppose you could try to index so the electrode faces the injector, but that's not likely to be worth the effort.
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