Recalibrate CPU with diffrent wheels?
Recalibrate CPU with diffrent wheels? When I bought my car it had 18inch rims on it front and back but my questions is if I were to change them over and put the 16s back on them would it mess up the MPH, RPMs, miles, and what not? Is the cpu going to have to be recalibrated?
That all depends on the diameter of the tires. It's possible for 16's to have the same tire diameter if they have a taller sidewall. But if it is different, your speedo and odometer will be off by the same percentage and will need recalibrated.
Not sure if the car takes speed off the front or the rear wheels but the 295's will have your speedo reading 1.9% too slow and the 275's are .2% too fast (close enough). I doubt the previous owner had the speedo recalibrated considering it would only be 1.9% off max so throwing the 245's back on would make the speedo accurate again.
Yea I mean everytime I drive by those radars on the side of the road that reads your speed it is accurate. The car will be exzactly at 40 and thats what the radar says so it should probablly all be the same
