My Bobs, for all their experience, seem to be on new medication or something. Try the X2010 on the Indy 500 or the first DCC race, watch as your Bob, instead of hanging back from his opponents, either:
1. Does a shimmy and streaks past
2. Does a shimmy, gets it wrong and sends himself or your opponent into a spin
3. Just slams right into the back of your opponent, waits a little then passes
He also pulls some banzai moves when he goes off and needs to return to the track, no more waiting for everyone to coast by.
OK it's a little clumsy, but still an improvement and I suspect he will fare better driving a slower car.