I just found a cool virtual drag racing game that is free for the first 25 races and they give you points that you can use to upgrade your engine, transmission, etc. or buy a new car. I have a hard time with my reaction time, but my ETs are pretty consistent. There are other racers on the site who challenge you (just make sure that they're not wagering points until you are good). Post your ET and some tips on here if you get a chance. Here's the link:
http://www.rpmworld.com/game.php