Ed,

Most of the racers use the Master Tach, it is $180 if you can find one. It has an analog display that some people like, and some don't. I personally like to see the sweep of needle, rather than jumbled numbers on a digital tach if you pinch the fuel line. It is the most accurate tach I have ever used and picks up a good reading from further away than any other tach I have ever tried.

I believe the only distribubor of them www.pspec.com is currently out of stock. Give Dave Schadel a call and get on his waiting list.

I am not positive, but I believe Dub Jett uses the master tach. Unfortunately, I recently had an expensive midair with Mr. Jett.