Algodoo

Good idea!

Some suggestions.

-If you drive backwards the meters go away. This doesn't happen in real life, as anyone who's seen Ferris Bueller's Day Off knows
-Tire smoke is a nice touch, but it's a little bit unrealistic. If you make it more blurry I think it would look better, and you should also add the ability to disable it, because it generated a lot of lag on my crappy laptop.

I've tried to do this for a long time but eventually gave up. It works perfect for me in sport mode (6 or 10 meters more, but that's ok!)
If you want you can use my Ford GT's smoke

Thanks for the suggestions guys.

pnvv, I'm not sure what you mean by "the meters go away". If you mean they count backwards then that's OK. If you mean they disappear, then that's a bug.

Yeah, go backwards is what I meant.