I know my speed-o is dead on when I go thru those speed zones (with the giant readout screens) that kindly tell you that your speeding and leaves it up to you to correct it. But I'm usually below 80 mph. when that happens.
I have to say, all these people who have topped out at these crazy speeds has me worried. No matter how deserted, and safe the location seems to be, there is always a chance of tire failure (no matter how good of tire you're using). This is coming from an old B.F.Goodrich employee, so I just hope you guys stay safe.
We've already lost one forum member, and it really brought the entire forum down for quite awhile. So I goes without saying we sure don't want to lose anybody else.