T01-100 is the guy to speak to mate, he knows more about rotors than me, and makes the rules that allows circuit racing RX7's with big singles elligible to compete in Australia's best tarmac rallies!
Given the new rules of 300RWKW and basically as light as you can make a caged one (1,150kg?), they'll be untouchable. Unless you have a fit 996 Turbo.