Yeah I know which thump you're referring too when supercharging which is much louder and "normal".
The thump I'm referring too is I believe related to the A/C compressor. Its feel and sound are much lower than the supercharging thump. Fan speed makes no difference. I'll see if a video might capture the (low) noise.
No supercharging correlation, but you might be onto something. What do you think it is if it's heat related?
I will test in cooler conditions, in my garage, not having charged nor used the car, and in Park. I will also test with Recirc off as I may have noticed the click is not there one time (but could have been a fluke).