I have autocrossed my contour before and it was all well and good but I found something better.
You can join BMW Car Club of America (BMWCCA) not matter what kind of car you drive. Then you can enroll in a drivers school. I have attended two schools and recently attended the Mid Ohio school at the end of May. For about $300 you get Sat and Sun on the track. We got three half hour sessions each day. You have an instructor in the seat next to you until you are signed off (usually on Sunday). Go as fast as you want and drive your car as hard as you want.
I get to pass a lot of BMW's, Porche, Trans Am's. You'll find that on the real race track that the speed of the car is more driver limited. I have lots of experience in go-karts so driving at the limit is easy for me. The other cars might have more power down the straights but the contour is good enough in the corners that the others cars point me past as soon as we get on the straightaways just so I am not hanging on their rear bumper in the corners.
Next school will be Nelson Ledges in Mid July. Come out and have some real fun at 105mph before you brake at the end of the long straight.
See you there.