Originally Posted by wydopnthrtl
I even went down to 87 octane on the 93 tune too! Had no audible ping and saw no knock sensor counts.
won't see a single Knock Count, ever.
The latest PCM calibrations retard knock by the CYLINDER, not globally. The retard counts only count up for global retard hits. You have to either use AdvantageIII to change to global knock (JUST for testing), or you will have to look at the knock PER CYLINDER. Now, increasing the timing is risky, you can be increasing the timing enough to cause radical retards in the timing. If you see a hit, it is because you managed to ping all 6 cylinders in a short time - Very bad.
I've got 8 hours and 15 pulls on an '06 to back it up. Good times.
Best to trust your tuner and LEAVE the settings as is.
If you don't trust your tuner, find another.
Playing with fuel will do little as well - it is there as a patch only. The real magic comes form the MAF Transfer - and that is not user adjustable.