I remember coming across somewhere the auto manufacturers are required
to hold accuracy of +0/-5%. Meaning you cannot show slower speed but can
be faster up to 5%.

- Vince

http://gipsyflies.home.comcast.net
1989 Vanagon GL Camper
1993 Mazda Miata (for sale)
1996 Land Rover Discovery
2005 Mini Cooper S

-----Original Message-----
From: Chris DeLong [mailto:green536@hotmail.com]
Sent: Monday, September 06, 2004 8:59 PM
To: gipsyflies@COMCAST.NET; vanagon@GERRY.VANAGON.COM
Subject: Re: Vanagon not as fast as you think

checked mine with a GPS and its saying on the gauge that I am going 57
but I
am actually going 63. I also have 29" tires.

Anyone have the link from the NTSA about precalibrating speedometers to
read
higher than reality to convince drivers to not drive so fast? I read it
somewhere and dint save the link.

Chris DeLong
Fine Tuning
206.522.5503
www.finetuningperformance.com
Seattle, WA USA

>From: Vince S <gipsyflies@COMCAST.NET>
>Reply-To: Vince S <gipsyflies@COMCAST.NET>
>To: vanagon@GERRY.VANAGON.COM
>Subject: Re: Vanagon not as fast as you think
>Date: Mon, 6 Sep 2004 19:08:47 -0700
>
>I checked my 89 Westy with stock alloy with a GPS and at 60 MPH it is
>only about 0.6 MPH off. 1%. This is better than most car I ever owned.
>
>
>
>- Vince
>
>http://gipsyflies.home.comcast.net
>1989 Vanagon GL Camper
>1993 Mazda Miata (for sale)
>1996 Land Rover Discovery
>2005 Mini Cooper S
>
>
>
>
>-----Original Message-----
>From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf

>Of David Marshall
>Sent: Monday, September 06, 2004 5:59 PM
>To: vanagon@GERRY.VANAGON.COM
>Subject: Re: Vanagon not as fast as you think
>
>
>Better yet, take a GPS on your next trip.  When my TriStar says 94km/h
>on the speedometer I am really doing 100km/h - to get the true
>odometer, multiply distance travelled by 1.11
>
>David Marshall
>
>Fast Forward Automotive Inc.
>4356 Quesnel-Hixon Road
>Quesnel BC Canada  V2J 6Z3
>
>http://www.fastforward.ca    mailto:sales@fastforward.ca
>Phone: (250) 992 7775        FAX: (250) 992 1160
>
>- Vanagon Accessories and Engine Conversions
>- Vanagon, Transporter and Iltis Sales and Importation
>- European Lighting for most Volkswagen models
>
>
>Due to the large volume of email  we  receive,  PLEASE  include
>previous emails when responding.  This will allow us to read the
>complete dialogue in one message and will result in quicker and more
>accurate  responses.
>
>
>-----Original Message-----
>From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf
>Of Wade Yorke
>Sent: September 6, 2004 5:12 PM
>To: vanagon@GERRY.VANAGON.COM
>Subject: Vanagon not as fast as you think
>
>
>You may not actually be going as fast as your speedometer indicates
>since the Vanagon speedometer is at least 15 miles per hour optimistic
>at the higher speeds.  In the Bentley it states that at 1000 rpm in
>high gear you are going 18 miles per hour (29 kilometers per hour) with

>the 4-speed transmission.  I don't think the 5 speed has a higher ratio

>in 5th, just different spacing of the gears. Divide your indicated rpm
>by 1000 and then multiply that by 18 and you will get your true miles
>per hour.  For example: your engine rpm is 4,500.  4500 divided by 1000

>= 4.5.  Multiply 4.5x18= 81 miles per hour.  My 1.9TD conversion (with
>gas
>transmission) shows 80 miles per hour at about 3,700 rpm.  It sounds
and
>feels like 80 but is really 67 miles per hour.
>
>Wade Yorke
>Nova Scotia
>'84 Westy 1.9TD

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