Mine ran consistent low 13's with 241rwkw running stock everything, besides an Edit and homemade $35 CAI. Running the same trim as every other day of the week. 35PSI in the stock 17" dunlops, sedan. Stalled to 2000rpm (to ensure gearbox longevity) although in hindsight, a total waste of caring in my case. May as well have stalled at 5000rpm ;-) Ran 109 - 110mph over 5 runs. Worst was 13.43, best was 12.987, averaged 13.2. Were you losing traction, as mine at those times never spun the wheels, dont even remember getting a chirp. Maybe Calder is more sticky. Good Luck, with that power, should be able to get into the 12's