Its not just a set number like 10 or 20 MPH. Its a percentage, so could be 5 MPH at 25 and 10 MPH off at 50. When I drove my car I was following family and they said they never went over 70 while I was pushing close to 90 a time or 2. I used Diablosport Predator to reprogram when I got home.
I got used to calculating my speeds from years of different 4x4's with big mud tires.
no i know how to recalibrate it, im just asking if anyone left it alone and never fixed it like me. i figure later on when i get some money ill buy me a programmer.