The number "805" is the number of revolutions per mile that the speedometer is
allegedly calibrated for at the factory.

Todd
'88 Westy

Joe Romas wrote:

> I would venture that the wrong spedo has been put in your van somewhere in
> the past. There's a little number on the bottom of the face. My 84 gl is
> "805" and it's a VDO brand. It has something to do with your problems. Maybe
> others will know more about the numbers.
>
> Joe
>
> ----- Original Message -----
> From: "Richard A. Jones" <jones@COYOTE.COLORADO.EDU>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Wednesday, October 24, 2001 6:47 PM
> Subject: speedo/odo error confusion
>
> > I just returned from a 3100 miles trip in El Jefe.  Well,
> > 3100 according to its speedo, or rather its "odo"....
> >
> > I've know the speedo reads high from some time.  Then
> > I watched the odometer between some mile posts and
> > decided it was high, too.  I thought it was gear driven
> > and should be OK even if the speedo was off because of
> > the calibration of the spring.  What do I know?
> >
> > I have the stock size tires--185 R 14--Michelin Agilis 61s.
> >
> > Then I decided to take advantage of I-70 which starts
> > from I-15 in Utah, with mileposts to the east.
> >
> > Here's what I recorded
> >     my trip odo             I-70 milepost
> >        77.8                      0
> >       186.2                    100
> >       292.0                    200
> >       323.0                    230 (Colorado state line)
> >
> > Converting to percentages:
> >        8.4%
> >        7.1%
> >        6.6%
> >
> > So if I drove an arbitrarily large number of miles my
> > odo error would be arbitrarily small?  What's going on?
> > Why should the odo error not be roughly constant.
> >
> > The only variable I can think of is the day started
> > cool and warmed up as I drove, but only cool/warm,
> > not cold/hot.
> >
> > Can anyone explain this?
> >
> > [Trip report and photos to come later....]
> >
> >                                 Richard A. Jones
> >                                 Boulder, Colorado
> >                                 '81 Vanagon   Mr Bus
> >                                 '87 Syncro Westy   El Jefe
> >