I ran my best times ever in the South Louisiana heat about a month ago. I beat on my car daily and don't hear a peep of detonation. Of course, I have an AED tune...not a McTune. So, YMMV.
Get a tune from someone who knows what they are doing and gives you personal attention and your car is no more prone to failure than a stock Ford tune. Use a "million tunes sold" tuner, and take your chances.
I am not trying to be an ass, I am just trying to impart a little wisdom here. I know whose tunes most guys on this site run, and I know why you run them. But, in the end it all goes back to Tommy Boy.
2012 Mustang GT M6, tuned by AED. 11.79 @ 116.26 with 3.31 gears.
<------------ Click Under New Orleans for my YouTube videos. Tons of exhaust and drag racing vids with my 2012 GT.