Your racing lines are very good. The control feels very realistic and challenging. The collision detection is perfect. Right down to hitting the side of a car to spin it. You have obviously put a lot of effort into making this realistic. I like that. You don't see many realistic flash games and I think this works well.

Forget what everyone else says about the speed. It's just right.
Add sound effects and it will feel faster. Even a speedy tune would make it feel great.
Get in touch through PM if you would like me to create the sounds. I would be happy to join such a specific game like this.

Well done, keep us updated with newer releases.
David.