I dont know if that would work out as a 12... Most "Calculators" assume that your not already TOPPED OUT at the 1/8th. They'd be stuck on the limiter for the other 1/8th of the track and wouldnt be accelerating, just stuck @ around 80mph. I assume the calculator the youtube video user used to get the 12.8 didnt cap the vehicle off at 80mph, probably said like a 105-110mph trap which these things obviously cant do.