FYI here is a link to a forum with very good racing technical info, for anyone who hasn't seen this place yet. You can find all kinds of good stuff by just doing searches of past threads.
http://corner-carvers.com/forums/index.php
Beware of posting though... anyone who registers there and wants to post should read and re-read the rules b/c they're *extremely* intolerant of any newbie jackassery and you'll get flamed like a burger on the grill if you break any rules.