2 Things-
1st - I'm having a problem whit the flywheel staying in place on the crank. It has messed up three keys. The first time I torqued the nut to 80 ft/lbs, the second to 100 ft/lbs as suggested by Don G. and this last time I went to 110 ft/lbs. It was also suggested to run a file on the crank to scuff it so it would grab. Any other suggestions.
2nd - The tracks around here are pretty short in length and the winning drivers seem to have a lot of grunt coming out of the hole. I like the way motoring is spinning up (when it seems to be running right) but it has lost some on the bottom end. I was going to advance the timing 2 degrees. I started asking one of the other riders who had also gotten an ARC wheel and he had gone back to the iron flywheel because the inertia of the heavier flywheel gave him the better holeshot and grunt off the corners.