I've been racing a Spec Miata w/Torsen 4.10 in ITA and it just isn't cutting it on the short technical tracks in my region (MidAmerica Motorplex (MAM) and Motorsports Park Hastings (MPH)).

Any advice as far as R&Ps go. I know a 4.8 has been proven to be potent at MAM. Heard others say 4.3 is better all round. Same with 4.77. Help!

Thanks,