Hi Doug,

The problem with using a GPS as a speedometer is the lag... My
Magellan GPS2000 is very accurate for speed ( +/- 0.1 KMH) but it has
about a 5-second lag in reporting that speed. Which means that I can
sometimes pull up to a stoplight and look over at it telling me I'm
still going 30MPH.

Once up to a steady speed it works pretty well. I once had  an 88
Eagle Premier where my GPS WAS the speedo.

Happy trails,

Greg Potts
Toronto, Ontario, Canada

1973/74/79 Westfakia Conversion **Bob the Tomato**  LY3H
1977 Sunroof Automatic L63H/L90D
http://www.pottsfamily.ca/westfakia
http://www.busesofthecorn.com

On 30-Jun-05, at 12:49 PM, Doug in Calif wrote:

> GPS !
>
>
> ----- Original Message -----
> From: "Bob Stevens" <mtbiker62@HOTMAIL.COM>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Thursday, June 30, 2005 9:32 AM
> Subject: Re: Synchro MPG
>
>
>
>> "maybe cause things werent > recalibrated after the PO put on 15
>>
> inchers..."
>
>>
>> that's the key here. I have 28.4" diameter wheels (16" rims, with
>>
> 225/70's).
>
>> That equates to 1.13% larger than stock so that's the number I
>> times my
>> indicated trip meter mileage by to get an accurate read before
>> factoring
>>
> the
>
>> gallons added at fill up.
>>
>> bob
>>
>
>
>