Originally Posted by Dropspeed
That could be driver improvement as he got use to the track condition, he varied the launch RPMs or the track was improving. Typically a 35 series DOT track (road race) tire is not effective at a drag strip because the sidewall is so stiff it doesn't allow for weight transfer. I am actually suprised that the 60fts are that good on the stock tire! Nice driving!
I agree. With wrinkle wall slicks, pressure is a huge deal, but these new tires I would not have thought were as responsive to pressure changes. It would be interesting to note any other changes like launch RPM and / or weather conditions.