If you guys ever get into datalogs, take a look at this book. It has good basic information on what you can do to improve your laptimes.
http://lapfaster.com/Portals/0/ebook...free_ebook.pdf
Mike, I don't know if that's how you normally drive or if you just took it easy because of the car in front. You aren't going to hit ice mode hitting the brakes that softly, get on it harder. Car should be able to hit 1G easily under braking, especially on Hoosiers.