I still don't understand. I guess I can see where hitting a bump could cause the car to jump and spin the tire a bit which would give a false readout. The problem is my first run was on a freeway in full automatic and I still got 12.19 which still seems too low from the times I've seen posted. The only other thing I can think is I've got the wrong weight. I showed how I calculated that weight previously but nobody has yet to give any details of the raodster weight they use with the K.A.T. Matrix acelerometer. Doesn't anyone use this on their roasters?

Cheers!