I have been doing some tuning with Tunercat, but I can't seem to get the speedometer accurate. What do I have to do to get the speedo to read correctly?

I have a 6 speed, 3.73 gears and stock size tires (245/50/16).

Under the Speed Calibration settings, I have the following:

New Calibration Values
Speedometer Scalar: 12
Speedometer Scalar Fraction: 1.032
Speedometer Scalar Scantool: 45.6
Time Between Pulses for Stop: 77.399
Pulses Per Driveshaft Revolution: 17

Speed Sensor Information
I have stock speed sensor checked
F or B - Car checked
Manual Transmission checked

Current Calibration Values
Speedometer Scalar: 25
Speedometer Scalar Fraction: 1.016
Speedometer Scalar Scantool: 41.036
Time Between Pulses for Stop: 36.56
Pulses Per Driveshaft Revolution: 40


Should the current and new calibration values be the same? Need some help.

Thanks.

 

Hit the calculate button. Those values you have listed are when you first load up Tunercat. You're values should read this

Speedometer Scalar: 13
Speedometer Scalar Fraction: 1.01
Speedometer Scalar Scantool: 50.479
Time Between Pulses for Stop: 69.918
Pulses Per Driveshaft Rev: 17

 

Ahhh...hehe. I figured it was something simple. Thanks a lot!