I believe you could do better than 13.5 w/ traction. I had a 99 WS6 t/a that ran a 13.2 at 108.5 in 100 degrees at 4500 elevation, but I didn't drive that well and I think I could have done better. i didn't have much wheelspin, but with that MPH and traction...lower than 13.5. Good work.