[Spridgets] RVI vs RVC tachometer

David Ambrose stargazer1 at cox.net
Sun Jul 31 19:54:09 MDT 2016


You can get a cheap automotive multimeter with a tachometer function. 
That will give you a true reading. IIRC, the stock tachs measure 
current, and the current is different with electronic ignition.


On 7/28/2016 6:51 AM, mdrowe via Spridgets wrote:
> The 123 distributor site specifically says that Smiths RVI 
> tachometers will not work with electronic ignitions.  Other sites say 
> they may or may not, for unspecified reasons.  My tachometer works 
> (and may be RVC ???), but it seems to read very high.
> It is true that the engine revs up really fast, and I now have a 
> 5-speed with different gear ratios than I am used to, so it could be 
> my imagination.  Baring purchase of an RVC tach, how can I determine 
> whether or not my old one is reading properly?
> Michael Rowe
> The Holy Sprite
>
>
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