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Old 02-23-2011, 07:48 PM   #19
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Okay, I'll bite. I've seen posts here that say no gain in a stock engine, others say there is a gain from the coppers gapped at .055. My engine is bone stock, no tune, nothing; was that the baseline for the dyno pulls that showed the ~ 5 hp gain? I've got no problem with going to a 103 (colder) plug, used to do it all the time as I tend to drive "enthusiastically" and my parts guys already think I'm crazy and will sell my whatever I ask for.
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