I did a 3rd gear burn out then went up on the 2 step and left on 7psi and rim moved 5 inches on the tires and the axle twised and broke.
Got a new axle in and put 3psi more in the tires so it would spin but the track was preped so good it just hooked up. I had boost cut at 21psi and had the boost set at 25 from 120mph so the car went 11.2@105 1.80 60ft using 1st,2nd,and 3rd cause as soon as I hit 4th it cut out and I lifted.
http://www.youtube.com/watch?v=uCIO7AxJakQ&hd=1