[Roadsters] GPS speedo calibration

[Tom Hendricksen]

The speedometers in the two GMC Denali's we use in a towncar service give
about the same readings when compared to the laptop GPS.  As far as I know
the GPS reading is very accurate, and I have used them o figure out how far
above actual speed my roadster speedo reads.  80 on the speedo is about 70
on the road.


Tom
69 2000 - Mr. Hyde
Portland
http://www.datsun2000.com
http://www.nowroc.org

On 5/14/2009 9:00:02 PM, Tim (tputland at charter.net) wrote:
> About seven or so years ago I was cruising down I94 from Minneapolis
> (leaving a trade show with another computer geek riding shotgun) to
> Madison on my way home from the trade show. My passenger had his laptop
out
> and was running (his new toy) newly installed GPS software. I was driving
> (at the time)  a company owned late model GMC passenger van. My cruise
> control was set at around 75 mph. According to the GPS software running on
> the laptop, I was running 72/73 mph.
>
> I would call that fairly accurate.
>
> Tim
>
>
> ---- Dave Cooke <cookefam314 at gmail.com> wrote:
>
> =============
> So, how accurate is a GPS at displaying actual speed? I calibrated my
> roadster speedo to my GPS & it showed I was consistently at least 5 mph
> below at low speeds & 8-10mph below at highway speeds.
>
>
> -DCooke
> Lake in the Hills, IL
> ________________________________________
> Support Team.Net  http://www.team.net/donate.html
>
> You are subscribed as tom at datsun2000.com
>
> Datsun-roadsters mailing list
>
> http://www.team.net/archive
>
> http://autox.team.net/mailman/listinfo/datsun-roadsters