Question, Chuk -- what is your rear tire size?

The reason I ask, I noticed my 60' times were .1 second faster with a 275/35/19, versus a 285/30/19.

The 285 was wider, but the overall diameter was a bit shorter, and thus resulted in a more tedious launch each time. Not sure if it's because the tire was heavier, or taller (or both), but the 275/35 tires simply grabbed better.

In the twisties, I preferred the 285s because they would allow the handling to be a bit more neutral (oversteer was easier to initiate, balancing the usual "front-heavy" feel of the car).

Cheers,