JohnVallo
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- Joined
- Feb 9, 2015
- Threads
- 49
- Messages
- 362
- Reaction score
- 599
- Location
- Venice, FL
- Website
- racersreunion.com
- First Name
- John
- Vehicle(s)
- '16 GT350, Shadow Black, Whipple Supercharged
https://www.mustang6g.com/forums/threads/speedometer-calibration.110607/page-2#post-2875272You will need to change the ratio in the pcm to make it work correctly. That can be done with forscan. It's a simple procedure with a laptop and a forscan approved cable.
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