sorry for taking so long to reply, will be in and out working on the site, but the only way to turn the fan on earlier is either to have the pcm flashed to turn it on earlier or thru the sct tuner, or now if not mistaken stingray had a diy deal here somewhere to where you could adjust the fan temp or maybe that was so you could do it manual like , cant remember.
but if you get your fan on earlier with the stat, you should in dead ass hot heat stay at or below the 190 area, some of you fellas in extreme heat like you are can def use that