I'll preface with I don't have any experience with this driving situation so I have not had to deal with the issues. What I will add is just what I've read about similar issues by Members of the Community that have had experience.
All of those mods' contribute to your issues. The car was validated under STOCK condition. You've altered the supercharger system, the cooling system, the ECM-tune, etc. with all of those mods'. By creating extra power, you've added more heat within the powertrain system and that heat bleeds into a lot of the rest of the car. Those heat exchangers, according to other Members (and I put it that way because they've found aftermarket heat exchangers, including radiators, to be detrimental - NOT brand specific either) don't do anything to help around a road course because they limit air flow and hold heat longer than the OEM set-up.
I wouldn't suggest that I know how to set a car up for anyone else, but it is my opinion that if you want OEM reliability and OEM optimization, you have to keep OEM parts and systems OEM. You've changed that with your mods'. It's your car, and I don't pretend to tell anyone else what they should do with their money, but there are Members still trying to figure this puzzle out, and your set-up is not effective in that regard, on a road course. If you want to beat on the car as Team Camaro demonstrates, then you have to run it the way they ENGINEERED it. That's the key - the car, as a system, is engineered. It is optimized. Unfortunately - your car is not, which is why you face the issues you do.
I only add that to be constructive. I'm not trying to sound like I'm attacking you in any way. This is the reality at this time though. There are others trying to find the solutions you are looking for, too, so I'd encourage you to keep checking in. Cooling system companies/manufacturers don't even have proper solutions yet, according to some Members. There's a magic the OEMs possess that we just don't yet have access to.
It is also my understanding that the ECM, in differing years, also bounce spark control influence from IAT2s to MATs. I thought I read that later ECMs use MATs for spark influence.
Just for clarification
