I guess it'd be fine. Maybe I'll add a class-based system (as theshanergy suggested), so all the cars are grouped together for individual classes, and then an open class with everything all smooshed together.
Cheers for all the support, can't believe this took off like it did.
Oh, and I think we should host the first race in New Zealand! Especially the Wellington (bottom of North Island) area, there's a whole bunch of nice hills mixed with flat parts
Also, OP updated!