Fwd: speedometer error

[ALfactor@domain.elided]

This particular GPS has a 3D mode where it calculates elevation.  The spec's 
say the velocity accuracy is 0.1 knot.  I have also checked several newer 
(1998-2000) vehicles and it has agreed to within my ability to interpolate 
the analog gauge.

As hard as it is to believe (LOL) I think the error is of more mechanical 
then electronic in nature.

Mitch Fisher
Dublin, CA
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Message-ID: <002d01c1a6b3$7c62efa0$44282ed5@nl>
From: "G.J." <quentemy01@domain.elided>
To: <ALfactor@domain.elided>, <alfa-digest@domain.elided>
References: <109.c65e342.29847929@domain.elided>
Subject: Re: speedometer error
Date: Sat, 26 Jan 2002 22:50:35 +0100
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Reply-To: "G.J." <quentemy01@domain.elided>

Did you correct your GPS for the amount of feet you are above sealevel??
Gert-Jan from Holland
(520 0.8912'N /  60 8.3053' W)
(156) SW 1.8 (Aug.2000)
http://go.to/mysportwagon
http://alfisti.net
http://alfa-forum.com

----- Original Message -----
From: <ALfactor@domain.elided>
To: <alfa-digest@domain.elided>
Sent: Saturday, January 26, 2002 10:27 PM
Subject: speedometer error


> For lack of better company, I took my GPS for a ride in my '74 spider to
> check the speedometer.  I was surprised to find it indicating about 12%
BELOW
> actual speed.
> Every other Alfa I've been associated with ('67 and '74 GTV's) all were
> optimistic by at least 10%. They all have/had stock tires and wheels.
>
> I'm curious as to what the range is, and thought it would make a good
rainy
> day thread. Has anyone else checked their Speedo vs. an accurate car, GPS,
or
> police radar gun (intentionally or otherwise)?
>
> Mitch Fisher
> Dublin,  CA
>
> --
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