Finally got the ZR1 into the teens on stock tires and brakes. The tires were 1 year old take offs from a street ZR1, so not fresh by any means. Track conditions weren't ideal so I decided to use Race PTM, which helped lay down power in a few areas. I focused on less initial pedal pressure in the brake zones and braking a tad earlier. At what point are you "fast in and fast out" ... 

2:18.351 Rolling lap
2:17.694 Optimal Lap, over these 3 laps.

My ZR1 is making too much power for Cup 2s. A "NO DRAMA THROTTLE" exit just isn't an option in these conditions so I let Race mode PTM do its job, which was great! You can still spin the car in Race mode lol... Also only running -2.3/-2.0 camber...tire life is much better at this spec but you can see it's hardships in the carousel. brb

Cars Mods:
LG Sway Bars/endlinks
LG Short Shifter
LG Headers/X-pipe (no cats)
Toe Rods
Katech Ported TB
Weapon X Intake Tube
Bigger air filter
Harness Bar
Belts