Sorry I can't answer all your questions George D, He has a programer that can be turned from tow mode to performance mode is all I know about his and is running 35x12.50s. He said he has never pushed his in performance mode. I believe him on that also. With that in mind he shouldn't know about spooling it up. As for mine I don't even know for shure what type of tuner it is, I bought it from a used car lot as is. I know it has one for shure, a few of my friends have the same trucks and one has his tuned with cold air intake and big exhaust.We raced he pulled me about half a truck in the start but never left me then at 80mph I flew by him. Mine never shut off. Both auto's, mine with stock size tires