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Date: Tue, 15 Dec 1998 22:07:13 +0100
From: RCS <e9225126nopsam1.tuwien.ac.at>
Subject: Re: Average speed


Ok, sorry Justin you are right - I had look at the wiring diagram - BUT - itīs the same information BUT that doesnīt mean that itīs displayed at the speedometer at the correct value... regards - RCS Justin VanAbrahams : > RCS wrote: > > > > Hi, > > itīs normal, that the speedometer shows 5 to 10% more speed, cause > you > > are not allowed to be faster than the speeding limit defined by the > > law!!! - so you should be on the safe (=slower) side. Also little > > differences in the diameter of the tires must not cause too high > speed. > > Thatīs why all speedometers show minimum 5% more! The SID computer > shows > > the truth cause itīs more accurate for calculating distances. > > Check the speed using a stopwatch and the distance index on the > motorway > > (1000m)! (30sek = 120kmph, 36sek= 100kmph, 45sek = 80kmph) > > > > (Justin - Iīm disappointed ...) > > > > Greetings -ROLAND- > > > > Charles Vaillancourt > > > > You shouldn't be disappointed, because you are incorrect. > The SID and the speedo do not agree because the SID is > measuring something different. I really wish I could remember > exactly what the explanation is, but I can't - it's > legitimate. If you're really interested, do a search > through Dejanews or something to find the answer. > > As for your "speedos show 5mph more" that's blatantly wrong. > Speedos are *supposed* to be calibrated to take into account > everything between the speedo and the drivetrain, and should > be accurate at all times. US law allows a speedo to be off > by no more than 10%, but this doesn't mean this is the norm. > Both my '88 9000Ts are deadly accurate, as evidenced by the > dyno they were both put on for their recent smog checks. > > At any rate, the SID and the speedo get their information > from EXACTLY the same place and display it in exactly > the same way. Pick up a wiring diagram for the cars > if you do not believe me. > > -Justin

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