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Message: <blockquote data-quote="swampratt" data-source="post: 3852027" data-attributes="member: 15054">If all the above were able to be obtained then plug gap should not matter as far as more complete combustion.You will have a lot of turbulence in a combustion chamber  way more when boosted.You can actually do something that is called blow the spark out.Tighten the gap or switch from a projected tip plug to a non projected tip  plug and realize gains.For the majority slow drivers that never see above 4500rpm larger gap will probably never hurt anything.Again testing to see what you get is the best way.If i had pulled that plug of yours from my vehicle and seen the center electrode worn away and rounded off i would look very closely for tiny Easter eggs on the plug.Basically tiny balls of dull aluminum.I would also pick a heat range a little cooler as that is too much wear for me.But i do realize the miles put on that plug also has a lot to do with it.My cars all crank over 200 PSI and i full throttle them every time I drive them.Tune is important to me</blockquote>