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I stopped using my trackey all together. I can still hear detonation regardless of brands of fuel. I haven`t gone WOT under 3500 since hearing it when I first had it installed in the spring. I just tried it out yesterday as it`s been awhile and I could hear it at 4500 plus for a few seconds. Black key runs like a champ. If the aftermarket tuners had a tune that pinged with 91 people would saying it`s a sh*tty tune,.... but where this is a " ford racing product" it`s perfectly ok and normal.