NASA HDPE Level 3/4 at High Plains Raceway, second session of the day. A little excitement on turn 4 of Lap 1 when Porsche attempted late pass. Outside temp was approaching 90 so managing engine coolant and oil temps were a challenge. I did hit the dreaded reduced power mode on lap 5 which was near the end of the session anyway. Car is 2017 C7 Z06 with automatic. Running with nearly worn Michelin Pilot Sport Cup 2 tires. Only mods are AFE cold air intake and Borla x-pipe.