Byron used a lot of glue when they prep. So not uncommon to see better 60' times there. Especially on radials.
Are you just rear wheel drive or still AWD?
If AWD I can see where the tires would be warm when on the street and cold at the track. Due to just sitting in the staging lanes, pulling up, and running. Air pressure can play a part as well. Less air pressure in a radial isn't always better. If too low the tire will distort and the contact patch changes. All of that could play into it.
AWD.
my first run this year, 40lb tire pressure and it blew the tires off. Ive never spun like that into 2nd.......thought i broke something, course I never let off and ran 13.00
It was fun....... Quickest 60 was at Byron 1.60