Date: Wed, 10 May 2000 19:06:13 -0700
Reply-To: Max/Joyce Wellhouse <maxjoyce@IPA.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Max/Joyce Wellhouse <maxjoyce@IPA.NET>
Subject: Re: Speedo Accuracy Discussion
Content-Type: text/plain; charset="iso-8859-1"
Maybe I flunked math, but if you were traveling 60 mph, you would cover 1
mile every minute. Travel 120mph and you get there in 30 seconds. Seems to
me that for every 5 seconds you cut off that minute, you would add 10 mph:
i.e. 70 mph would average 55 seconds, 80 mph in 50 seconds. I also get
goofy readings when I use only one pair of lollypops. Better to time 10
miles and take the average. With 215/70/14 Goodyear Wrangler Aquatreds(only
a 96 load rating, my bad), my speedo is only 1 mph fast at 70 mph.
Dimwitted Moose and Flying Squirrel
----Original Message-----
From: Tobin Copley <tobin.copley@UBC.CA>
To: vanagon@GERRY.VANAGON.COM <vanagon@GERRY.VANAGON.COM>
Date: Wednesday, May 10, 2000 1:56 PM
Subject: Re: Speedo Accuracy Discussion
>At 3:44 PM -0400 5/10/00, Bulley wrote:
>>If your highway has mile markers, time your travel between the mile
>>markers. Interpret your result as the number of seconds, it should be in
>>the 40-60 second range, dependent on speed. For giggles, lets say it took
>>you 39 seconds from one mile marker to the next.
>>
>>-----Original Message-----
>>From: robot . [SMTP:robot_works@HOTMAIL.COM]
>>Sent: Wednesday, May 10, 2000 3:03 PM
>>
>>So without a stopwatch, how would you confirm the speedo accuracy?
>
>Except that mile markers are often placed a surprising distance from
>where they "should" be. That'll throw your calculations off, and you
>can't know in what direction.
>
>Find an "odometer test section" (these are the sections on the
>interstates with the small black signs marking miles off 0, 1, 2,
>3... usually for 5 or more miles), and time from there. The sweep
>hand on your wrist watch will do just fine. Being a diesel westy
>driver, my math is easy: I hold it at *exactly* 60 mph indicated--if
>i do 5 miles in 5 minutes it means my speedo is bang on. OK for me,
>since I always drive 60.
>
>Sounds like it might be hard to slow down that much for some of you
cowboys!
>
>T.
>
>-------------------------------------------------------------------------
>Tobin Copley Bowen Island, BC, Canada tobin.copley@ubc.ca
>
>'82 westy 1.6L NA diesel ("Stinky")
>'97 son Russell =============
>'99 daughter Margaret /_| |__| |__|:| clatter
>1995: 'Round US, Mexico, Canada 15,000 mi O|. .| clatter!
>1996: Vancouver to Inuvik, NWT 7,400 km ~-()-==----()-~
>Previous buses: '76 westy deluxe (Daisy), '76 westy standard (Mango)
>http://www.sfu.ca/~tcopley/vw/
| 
