Or just get a small bicycle GPS computer or a wireless cycle computer with
a magnet if you are really cash-strapped...
If you have a so called smart phone, there are dozens of apps to tell you
speed and location and distance and laps and everything except XXX?....<
would have been the acronym we aren't allowed to type here..

On Tue, Jul 29, 2014 at 5:34 PM, Al Knoll <anasasi@gmail.com> wrote:

> Always wondered why extreme speedometer accuracy is such a holy or holey
> grail.  Like Time, it really doesn't matter what the speedo says only what
> the speed device on the arresting officer's machine says.  In traffic, stay
> with the slower sheep and the wolf will generally ignore you.  Now if your
> speedo is 10% off then at 30 its 27 or 33, no worries, at 60 it's 66 or
> 54.  Not really enough to gather paper but enough to get the big hairy
> eyeball from the  gendarme.  On the superslab, you won't likely be able to
> cause a kerfluffle, and with big tires and unmodified braking 65 is way
> fast enough.  If you drive it enough, you can mentally adjust for
> groundspeed versus indicated.
>
> Pensionerd.
>
>
> On Mon, Jul 28, 2014 at 1:55 PM, Dennis Haynes <d23haynes57@hotmail.com>
> wrote:
>
> > The speedometer is very easy to re-calibrate. Simply reposition the
> > needle. As for the odometer most from this vintage are over ambitious
> ~4%.
> > The number at the bottom of the speedometer face indicates revolutions
> per
> > mile. Compare that with the RPM of the tire size you wish to run. Some
> vans
> > have speedos calibrated for 805 revolutions per mile and stock tires run
> > close to 830. That 3% right there.
> >
> > Dennis
> >
> > -----Original Message-----
> > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
> > Of Ralph Meyermann
> > Sent: Monday, July 28, 2014 9:22 AM
> > To: vanagon@GERRY.VANAGON.COM
> > Subject: Crazy idea?
> >
> > I'm probably not the only one to think of this. With all the various tire
> > sizes/options we are putting on and changing our Speedo readings, I was
> > thinking modification of the O2 mile counter or making something in its
> > place with changeable gears to correct the reading for running non
> factory
> > size tires???  Do I need medication for this idea??
> >
> > Velma 82 1.9L AAZ TD Westy
> >
>