Hello, I have a 94 R2 with a VERY slow speedometer. If you acclerate normally from a stop,and use the tach for speed reference, the speedo is about 10-15 seconds behind. The same on the way down, you come to a stop while the speedo is only down to 30 mph, from 60. I have a Greddy Turbo Timer and I know it is tied into the speedo system, on the purple wire. Any insight would be appreciated.

Thanks,
Ryan