Check the A/R you have and turn it up.
@ Piggaz... It is funny, "new billet" wheels are generally not lighter (if at all) compared to cast. Turbo tech has no relevance to singles, twins, etc I am not sure what you are eluding to.
@Nismoid... most people don't care because they are blinded by marketing or stuck with a sponership, I think that covers most on forum and Time Attack cars.