[Miata] speedo/tach accuracy

[Dillon]

It's hard to tell with the Scanguage due to the 2 second delay on its
updates, but according to my GPS my speedo is accurate.  That's on my '99
6spd.

On 8/3/07, Neil Tusing <ndtusing at yahoo.com> wrote:
>
> >From: "Anthony Oliphant" >
> >I have a '94 5 spd, m edition. They speedo seems to
> >be running a little fast. What are the revs in top
> >gear at 60mph, or 80mph??
> >
> I thought it was a common rule of thumb that in top
> gear (5th or 6th), MPH was equal to 2 percent of RPM,
> ie multiply RPM by 2 and divide by 100 (or multiply by
> 2 and drop 2 zeros).
>
> That was the case in my '93 5-speed, although I never
> checked it with a GPS.  It is definitely the case in
> both my '01 LS, 6-speed, and my '04 MSM, 6-speed.  And
> I have checked both with the ScanGauge II and GPS.
>
> >From about 60 MPH on up, the car speedo reads about 5
> MPH high.  Here's a post I did in March, right after I
> got the ScanGauge, comparing MPH and RPM between the
> car and the ScanGauge.
>
> http://list.miata.net/pipermail/miata/2007-March/079518.html
>
> Neil Tusing
> Dual Citizenship:  Del-Val/LVMOC
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