A few days ago I spent the day lapping at a racetrack. ( Go-kart track, 0.9 miles, 18 turns, my max speed was about 74mph )
My car is an early 2.0 non-sport.
I drove in performance mode. In between sessions I charged in standard mode 240V 40amps.
I ended each session when I hit the power limit due to motor temperature.
Ambient temperature was about 24C
It took about 7 minutes of hard driving to hit reduced power due to motor temperature.
A typical session the motor would start at 61C and then hit 147C and then I would do a couple cool down laps.
It would take about 4-5 minutes for me to stop and plug back in. About 18-20 minutes later the motor would be down to 61C and ready to go again.
The PEM would start out at 35C and peak out at 45C, but be back down to 35C by the time I parked.
The ESS would gain about 9-10 C by the end of the session. An early session it started at 24C, was at 33C when I stopped, but be back down to 28C after 18 minutes plugged in. So each session I drove, the ESS gained a little bit of temperature, slowly climbing during the day.
The later sessions it started between 28C and 30C and peaked out at 38C or so.
If I had charged in perfomance mode, the ESS would have cooled less. I believe that I would have gotten slightly more power out of it because of that - but that does not seem worth it because getting it hot reduces its life.
The next time I go, if the battery approaches 40C I will charge in range mode to cool it down a little more in between sessions.