[WardL]

Something else to consider. I have Michelin tires and they have a reputation for being a little unpredictable. Maybe they hold the road well, but then unexpectedly they brake loose when you don't expect it. What about the operating temperature of the tires? Seems like even in autocross you start off with cold tires and with such a short track with no warm-up lap, you will always be on cold tires! I think it is another variable, if you start hot rodding around when your engine get's warmed up that's ok for the engine, but who remembers to warm up their tires?