Speedometer calibration

sail7seas

Registered User
I went from a 3.27 to 3.55. Then went to Speedometer Service.

Speedometer gear was a 19 tooth,
and I had 9-10 percent Speedo error , and 9-10 percent Odometer error on dyno.

Changed Speedometer gear,
Speedometer gear was a 21 tooth,
and I had 9-10 Speedo percent Speedo error, and Odometer is correct on dyno.

Changed Speedometer gear,
Speedometer gear was a 20 tooth,
and I had 5-6 percent Speedo error , and 5 percent Odometer error on dyno.
So this is the closest and I kept this calibration.

So what Calibration device below would you recommend, or please recommend others.
Thank you in Advance.
Chris

Dakota
http://www.dakotadigital.com/Detail.cfm?Category=122&PartNumber=SGI-5
Summit
http://store.summitracing.com/defau...pe=bysummitpart&searchtype=both&part=cyb-9902

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