Hi @redapg Here my json https://drive.google.com/file/d/1qNgCtSMRFJW8CK2rYkWfBnK4Vz_PsXiK/view?usp=sharing
I did use your player.JSON and i got one Car spinning in the last Turn in the first Lap and 2 Cars during Lap 1, 2 and 3 on other Parts of the Track. After 3 Laps i stopped it. It indeed seems to be worse than with my player.JSON. I would recommend to rename/backup you player.JSON, to get a fresh one when you start the Game and check how it works with the default Settings. Maybe the Combination of Settings, in your current player.JSON, is "not good" for the IR18.
No Problem, you are welcome. And if you try it with a fresh player.JSON, please report if it improves the Behaviour on the IR18-Sebring Full Combination.