50
th
Anniversary
Ford Mustang Cobra Jet
Official Owners Manual
Techline 1-800-367-3788
Page 6
The min and max values shown are the limits of each adjustment.
Scalars Tab
Tire Size, Axle Ratio
You may adjust the scaling of your vehicle speed data by changing the values of the
axle ratio and tire size in the PCM. Do this by typing in the correct values of each in the
Calibrate>Scalars tab. The changes will upload to the PCM after you select Write Data.
ATTENTION!
Ensure that the battery voltage is at least 11.5V before writing to the PCM.
Ensure that the write process is complete before unplugging the Vehicle
Interface dongle.