I can tell you I did 160 in a standing start to 1 mile, it took me another mile to get down to highway speed, and would have taken another half mile to have come to a stop....now I quess I could have just jammed the brakes but, I coasted down stab braking a little at a time....I think it would take at least another mile, or 2 miles total to reach 180, if you can at all...and you had better have a 2 mile shut down allowance in there if you do obtain it...and I am looking for a safe place to do this, but haven't found one so far....no old air force bases around here long enough...but I am keeping an eye out on a new interstate construction that is going on south of me....lol