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- eldersburg maryland
No doubt someone here has already done this. The PPM on a stock A1R is set at 62619. Reducing this number makes the speedometer read higher. I roughly figured that 45398 would be very close to correct but it seems to read to high. Any one done this? And yes I know I can tweak this with a GPS but some other people may need to know this number also. It is set in the Cat ET software.