Has anyone got any experience with these.....

[sambo]

https://www.burtonpower.com/product_mai ... Code=PC150

The revotech speedo's

With the sensor on the propshaft bolts?? How the hell does that work?

 

Any good? What about accuracy?

[ZetecVan 2.0]

It'll work just like a bike computer... You can install those in cars and kit cars. You have a small magnet on the prop and the pickup near by. You then have to program the speedo with the distance the car travels for every one revolution of the prop.

 

I've read about someone who fitted a bike speedo to his caterham and the accuracy was pretty much bob on, at all speeds.