Got another 4 passes Friday night, and did slo mo video of the launch. Now I know why the 60' are off by about .05:
Looks like it's hitting the tires pretty hard. The car hooks for about 1/2 of a tire revolution, then spins about 2 turns or so, then hooks up again. Trying to figure out what to adjust to get it to stay on the tire.
Shocks are currently at #6, so can go either way with those, tire pressure is at 13.5