I got a new gauge cluster for my '94 formula and I need to add some miles to the tachometer. Does anyone know how to do that?

 

First you dont add miles to a tachometer, maybe a speedometer.

 

ummm...Chappie, since when are miles a unit of speed? You add miles to your tach, you would add miles per hour to your speedo, but you really can't do that anyway. On the other hand, back on topic, I'm not exactly sure how you'd go about it, check all the connections etc. on the back by the tach, see if you can't just swap the tach from your car into the new guage cluster, that'd probably be the easiest way.

 

You could do it the same way crooks roll them back. I don't know how they do it though.

 

two ways go here and use that info http://www.9c1.com/technical/camaro/odometer.htm
or just swap the odometer