99 ss a4 with 3200 vig/ 413 at the wheels..1.77 in the 60 foot ,90.2 mph in 1/8 only ran 12.15 at 112.8 (shoundnt this be in low 11, the car last summer had 390 at rear wheels and ran 12.3 at 120 mph with stock converter , i changed the the new trans and stall,and went with a bigger drag tire .( 335/35/17, is this too big) why are may times only .15 better???