Originally Posted by Porschefile
I've seen v=150 indicated at VIR. I don't think that is accurate though, I'd guess the GPS speed would be several mph lower. I'll get some GPS data from Rezoom Sep. 21.
Now, if you coded the car to show actual v= then theoretically it would be very accurate since I think it also pulls the data from the car's GPS. I could be just talking out of my ass. Mine is coded and there is a huge difference between the car's speedo and what it shows on v=. BMW speedos are very optimistic to say the least.