Erratic modern tach

[StressCraxx]

Thanks, Greg and Mike. I was just checking out some of the YouTube videos from http://www.spiyda.com/ which Phil mentioned. I am now wondering if my tach is actually broken. It reads very accurately and only bounces for a second or two after I shift. After looking at the videos, I am wondering if the problem is my expectations. Do tachs of this era all bounce a bit after a shift? My main point of reference is my modern mini. When I shift it, the tach drops a very little bit, then is almost immediately accurate, vs the second or two of bouncing around with the smith’s RVI tach. Just curious as I hate to fix things that aren’t broken. Thanks, Dan
PS. The spiyda conversion is very cool. My only worry would be how to calibrate it after the conversion.

Hello Dan,

Yes the original Smiths tach tends to bounce after a shift. There is very little damping in the works to reduce the lag. They also tend to read high as they get older.