It would be nice when you reach a playable stage with tyre physics development to start an open test patch for us to help you finding glitch and exploits that beta testers ignored or didn't found.
Nothing can be perfect, even the actual tyre model has some strange behavior which help players to get faster through an unrealistic driving technics, so I hope you will find a good compromise in a reasonable amount of time so you can bring a new life into LFS.