Porsche on the mountain is still very interesting. For me the quali setup feels quite stable but you have to be very smooth with your inputs. Traction control at 2 is what the car likes for the most laptime possible but you can get away with going up to 4. The race setup is good for up to 30 minutes, theres defintely time in that lap so take it with a grain of salt. To make the race setup a bit more drivable you can increase the wheelrates on all 4 corners 3 clicks, maybe even more without sacrificing too much.