Hello Jeje!
Recently I tried the Z4 and the M6.
Before I start, do you have a tune for the Renault R5 Turbo? For some reason I have a custom tune for this car and my sheet is saved with your name, but I couldn't find it in this thread. Did a saved someone's else tune with your name?
The BMW Z4 GT3: The car is so fast and there's so much grip! I tested on all Gr3 5-lap and 10-lap events. The car is perfect. There's a certain satisfaction when exiting a corner with full throttle. Highly competitive, it's really pleasant.
I tried removing the limiter and the car goes pretty fast, but then the brakes seems to not be enough. Good tune man, it's really satisfying.
The M6 is a little odd. With your tune, I'm faster in Sardegna, but especifically for the WTC 800 race, I think the turbo isn't a good idea just because of fuel efficiency. The M6 can do 5-6 laps without the turbo, which leads to only 2 stops in the race. With the turbo it can only do 4 laps. It's faster, but again, especifically for this race I think it's a good idea to race without it, so that way a 2-stop strategy is possible.
I also had a strange behavior with grip levels on RH and RS. I don't know if it's your tune, the game or my brain, but would you believe me if I said I had more grip with worn out soft tires than with perfectly fine hard tires?
Isn't that strange? I thought it could be just the car, since even in the default settings the M6 has so much torque that is hard to control it on the exit. I tried a 5-lap race with RH and everything went perfectly well. Then I tried a 10-lap race at Daytona with RH and by the end of the race the car was sliding a little bit, but it's ok since the tires were worn out at that point. So I tried the same race again, but this time with soft tires. Even after the first stop where I kept the same soft tires, I swear it felt that I had more grip than with racing hards. I definitely need to try that more, this is quite peculiar!