Bill.
My speed rating is out as well but dont worry about it. When setting up your gear judge all the apexi needs is a reading. It is RPM divided by Speed.
The fact that the apexi is reading a false speed isn't important. When you go into gear judge drive along in 1st gear it will give a reading (mine is approx 145) input this in the setup section, go into 2nd gear and the reading will be less think mine is ~115 and enter this in the setup section.
Do this with all the gears.
Then to adjust gear dependant boost go into the START DUTY section and adjust the value accordingly....into minus figures for less and plus figures for more.
Mine is set at -34% iirc and at 0% for the rest.
Iam using RPM dependant boost control and fiddling with START DUTY to get the results iam after.
I have had mine in for a while and its still not setup bang on, i still get spikes upto 1.5BAR which i dont want, just a case of fiddling. but its hard on the open road as you can imagine as the speedo creaps round rather quickly.
Ideally setup on a RR