[jmatta]

Welcome to the forum! Good story...I love vintage racing and go to as many events as time permits. Luckily, I live close by four great tracks (Blackhawk Farms, Autobahn CC, Gingerman and Road America) and not only spectate, but drive my '73 911 when finances permit.

As for your situation, I think Mike hit it on the head. It's not so much the size of the tires, it's the age and wear that's the problem. My friend bought an '02 S four years back with 15k miles on the clock and original Pirelli P-Zeros. They were hockey pucks; loud, no grip, just terrible, even though they had considerable tread left. I introduced him to my tire guy and he had a new set of Michelin Pilot Sports installed...the difference was night and day (these are 18s, mind you). As Mike said, rather than change tire specs, put on a fresh set of tires (your choice) with a proper alignment and you'll be very surprised by the difference.

Best of luck and enjoy the Box!