Speedometer issue after tuning - MustangForums.com


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Old 09-04-2015, 04:42 AM   #1  
articman
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Default Speedometer issue after tuning

Help!
I have a 2001 Mustang GT with all the goodies to go with the Procharger. Problem is I took it to a tuner to get all the hp I could. After dyno tune, the speedometer is way off! He showed me he entered the 3:73 gears ratio, and second and third try to correct was a fail! Speed sensor is new and recalibration kit, NO Luck!!! Any ideas?
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Old 06-21-2018, 11:45 PM   #2  
8 ball
 
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Quote:
Originally Posted by articman View Post
Help!
I have a 2001 Mustang GT with all the goodies to go with the Procharger. Problem is I took it to a tuner to get all the hp I could. After dyno tune, the speedometer is way off! He showed me he entered the 3:73 gears ratio, and second and third try to correct was a fail! Speed sensor is new and recalibration kit, NO Luck!!! Any ideas?
I assume that 3:73 is the correct gear ratio installed in your car. What about tire size? Was the correct revolutions per mile entered? Tirerack.com has a rev/mile calculation tool.
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