Ratickle
Founding Member / Super Moderator
Just like JIm said if you r in a bracet average speed you can run 5-10 mph fast and slow down any time u want to stay in your average bracet pretty simple. Why do u think SBI and OPA use GPS. No different then APBA did yrs ago.
The part that doesn't make sense to me though in OPA is the breakout if you go over by 1 or 2 mph one time during an entire race. I really believe there should be some kind of allowance. We all know that GPS isn't perfect. Put two side by side in your car and review the highest speed on recall every time you drive. They are never identical.