Timing will start to be pulled slightly around that temp but yes the timing curves compared to RPM looks a little strange. Your boost max actual is about 10.1psi. Bump that to 15psi and you will see a different car but at high temps the car will pull boost and/or timing as the knock sensors pick up incipient knock and pull timing/boost. You can log the knock senors by bank. I think they are Group 20 (1 ~ 4) & 21 (5 ~8).