people don't really understand how hard it is to drive a turbocharged car (that isnt AWD) at the dragstrip on street tires. Its not as simple as controlling spinning off the line like with a NA setup. When i ran the mustang on street tires i had the same issues, spinning off the line, then again under boost in each gear.
When the car was NA, I ran a 12.77 @ 106, probably around 280 hp/ 300 trq to the wheels
when the car was turbo i ran a 12.86 @ 120, with 410 hp and 475 trq.
its not easy! i understand ryan!