I went to my first track day of the year yesterday. This was a Sports Car Club of America (SCCA) event so it brought out many different kinds of cars. I had an intake plenum and a torque based differential (TBD) installed over the winter. The TBD made a HUGE difference at the track. Last year my best time on the west track was high 1.49s. Yesterday I had 3 laps down in the 1:45s. Lots of fun but cold (49°) and breezy.