996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

Speedometer Accurcy?!

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Old Dec 11, 2004 | 02:14 PM
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Speedometer Accurcy?!

Does anybody notice that your car's speedometer reading is a little bit higher than actual speed?

Mine is about 4mph higher than what laser reads and I am running stock size wheels.

Just wondering if that's what everyone's car like? and how to fix it?
 
Old Dec 11, 2004 | 02:39 PM
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At what speed? 4mph off at 100mph is okay, but I would rather it be 4mph off at 190mph.
 
Old Dec 11, 2004 | 03:01 PM
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at about 30mph...
 
Old Dec 11, 2004 | 03:03 PM
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Old problem, easy fix.

'99's came out in the 3-5mph range, were later corrected with software/PST2. Not perfect, but closer.

Today's are probably off by a smaller amount. Don't sweat it. If they nail you for 125mph, you can always argue you were doing 120.
 
Old Dec 11, 2004 | 03:09 PM
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Last edited by Silver996TT; Dec 11, 2004 at 04:47 PM.
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