have a motorsport section... under that you subsections for each formula... and in each one have a pinned topic with the dates for that specific formula?
I'd be happy with just one section for all motorsport related- is interesting reading about other types of motorsport stuff, as it's only some rules and state of tune, set-up that will be wildly different, everyone is in it to go as fast as possible so a lot of info will be helpful to all.
A sub-forum for each type of motorsport would be great, but I don't think we'd get enough traffic for it, and it would be a bit rubbish if you only had 2 threads in each... Maybe that would be a future upgrade?