Our FM2 Clan holds 3 week long spec series races. In these races everyone runs identically prepared (but not tuned) cars. For the month of March, 2008, the car selected was the Mini Cooper S with some mild modifications bringing it up to a C550 PI.
We hold three race sessions a week trying to find a time slot everyone can use, Tuesday and Friday nights and mid-day Saturday. You don’t have to participate in all three sessions, naturally, but you can if you want and use your points from your single best race period.