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From: gv@mtuxo.att.com (52341-G.VALENTINI)
Newsgroups: sci.physics,sci.electronics,rec.autos.tech
Subject: Re: Speedometers was: (Can 31 party balloons aggravate 1 police RADAR?
Message-ID: <3010@mtuxo.att.com>
Date: 10 Oct 88 19:08:24 GMT
References: <880928.0208.11468@ontmoh.UUCP> <171@leibniz.UUCP>
Distribution: na
Organization: AT&T, Middletown NJ
Lines: 32

In article <171@leibniz.UUCP>, keithh@leibniz.UUCP (Keith Hanlan) writes:
> Peter, typically the speedometer lags behind the true speed of the
> vehichle. If you had just turned the corner and finished accelerating
> and your speedo read 70, with error, it is not unreasonable to guess
> that you were really doing 88. 
> 
I don't agree.

Typically the manufacturers set the speedometers
to read HIGHER than what you are actually going. 
So if you think you're going 70, you're really going 67mph or so.
They probably do this for safety concerns.

I have calibrated (used LOTS of sample points) my '86 RX7 with the mile
markers on the highway and have found my speedo to read 2-3% higher
than actual.

My friends' results are also the same, so I have a two sample points
to back my observations.

Other viewpoints?

--
Those that will burn in hell:
1) homicidal maniacs
2) terrorists
3) people who drive too slow in the fast lane.
        THE FAR SIDE cartoon by Gary Larson 


                                      George Valentini
                                      att!mtuxo!gv