i don't think the 240 really is all that competitive in w2w competition. iirc, bbp shouldn't be doing as well as he is.......which is why he's an instructor

. i wouldn't even attempt to enter any of the GT or production classes, as that requires a lot of money, and modification to a somewhat uncapable powerplant. if anything, the IT(A/S??) class is where to be. it's much cheaper, typically more even competition, and there's always somebody to race with. that said, i think ITS is where those damn E30's and 944's are. where the 240 might be competitive is in your cone dodgeing competition. the high torque low-rev-range output of the KA is actually an asset here, with lots of slow speed corners. now, when you start transitioning quickly and frequently, the relative porkiness of the car becomes an issue.
i really don't know how competitive it is, but my guess is not very.