http://www.e90post.com/forums/showthread.php?t=412156
This thread has everything you need to know. As said above, the first time out you will probably not limp if you have never tracked much before, but they will happen eventually as you get faster and want to push the car more. Also as you know, with an AT car you will undoubtedly limp from coolant temps before you will from oil temps.
Go out and have fun this time, and see how the car does, then you can start taking steps to help with cooling issues as per that thread I listed.