Suggestions are always good, even tho I'm not sure if or when we'll start a Turbo Drag 3. Save those thoughts, I always post on here when I'm starting a project and get advice. However the process of making a game is long and vast and things always get overlooked or just avoided for "realistic" purposes. You're right though, the math behind the parts and performance is always an area that becomes very complicated, hence the words "arcade style" , rather than "simulation". Maybe we can slowly creep into using the word "simulation" with everyone's help, if we attempt a part 3.
Bosses(There are 3 bosses): Every track has a chance of racing a boss, but the hardest race at each track is your best shot. Will all be very easy if you're running 8.4's though.