My current S/P car has a glide in it with a CO2 shifter set by RPM off of the Biondo 400 box, I raced it at Woodburn last year at the Mopar race and found out that by moving the 1-2 shift point from 7000 RPM to 7300 RPM the car ran exactly(almost) the same ET, 8.864 at 7000 RPM at 148.??(CRS) MPH. The next run 25 minutes later shifting at 7300 RPM in the other lane it ran 8.866 at 150.?? MPH The 60 ft. 330, 660 and 1000 FT where almost identical, the MPH was the only real differences, which really surprised me