My problem is the fact that it didn't do that before. One difference is that I have the SOLO downpipe in so maybe that could be making the engine bay hotter. I don't know. It's just so weird!!!!
That could make your engine bay hotter but doubtful. A catalytic converter is hardly an insulator for exhaust heat. LOL
I would run the following tests.
First, start up the car from totally cold and begin scanning. Stay out of boost and drive the car easily until engine coolant temps come up to normal operating levels and stay there for a while. Drive the car at speeds of 40+ mph to keep air moving over the intercooler. Drive for about 40 minutes once engine coolant temps reach normal levels and log the entire drive from the time you start until you end. This is your baseline. Be sure to be MAP as Boost, IAT 1 and 2, RPM, Speed, O2 AFR, KR, and throttle position.
For test 2, start the car from cold and let it warm up like before. Once up to temp though, you want to do a WOT run from first up through third. Log this again from start to finish with the same parameters as before.
For test 3, start the same as test 2 but now you're just going to do a pull in 2nd gear. Let IAT2 temps come back down and stabilize before turning the car off.
For test 4, repeat test 3 but use 3rd instead.
For test 5, start off like you did in test one. After driving a while, do a WOT pull in 2nd or 3rd gear. Allow the IAT 2 temps to stabilize close to where they started. Then do a WOT run from a standing start up to the end of 3rd. Cruise again until the IAT 2 temps stabilize once more. Then do 3-4 WOT runs in 2nd or 3rd back to back. Cruise again until IAT temps stabilize once more.
Test 5 will obviously be your longest test. Each log should include a time of each line of the scan so you can see how long it is taking the IAT 2 reading to rise and fall. In Test 5, the longer you are into the test the hotter the IAT 2 temps should stabilize at. I doubt that after that first or second pull in test 5 that the temps will get very close to IAT 1 temps. I also bet IAT 1 temps will gradually rise during test 5 too.
These tests will do these things:
Test 1 will give you a base line of how engine bay heat only affects the IAT temps. Both should rise during the drive but stay close so long as you stay out of boost.
Tests 2 will give you an indication of how IAT temps are affected when there is no heat soak over a long hard acceleration at full boost and over multiple gears.
Test 3 and 4 will give you an indication of how IAT temps are affected when there is no heat soak but over a shorter pull in one gear and show you the difference between the IAT readings when the load and length of the pull are different.
Test 5 now will give you readings on how much you get heat soaked over time with different pulls, how long it takes for that heat to get pulled out of the system, how completely the heat is pulled out of the system, and how easily it is to heat soak the system, how effective the system is in reducing overall heat soak, and how the system acts when it is heat soaked.
That will give you some comparable data to start getting your answers.