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| Air Medal or two Join Date: Jul 2003 Location: cross roads 
					Posts: 14,122
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				spedo error
			 
			my speedo  reads about 10 mph faster then real world time. Is this normal Porsche ticket limiter? Would like some clues here as to what might cause this. maybe someone put in a diff ring and pinion ? 
				__________________ D troop 3/5 Air Cav,( Bastard CAV) and 162 Assult Helicopter Co- (Vultures) South of Saigon, U Minh Forest, Delta, and all parts in between | ||
|  10-12-2005, 01:20 PM | 
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| Registered Join Date: Dec 2004 Location: Novato, CA 
					Posts: 3,064
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			Conventional wisdom is that Porsche speedos will usually read about 5 mph fast. This is affected by your wheel and tire choice of course. The speedo is internally adjustable if you care to take it apart. ianc 
				__________________ BMW 135i. Nice. Fast. But no 911... "I will tell you there is a big difference between driving money and driving blood, sweat and tears." - PorscheGuy79 | ||
|  10-12-2005, 01:27 PM | 
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| Air Medal or two Join Date: Jul 2003 Location: cross roads 
					Posts: 14,122
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			hmmm take it apart???????/will it be sort of obvious??
		 
				__________________ D troop 3/5 Air Cav,( Bastard CAV) and 162 Assult Helicopter Co- (Vultures) South of Saigon, U Minh Forest, Delta, and all parts in between | ||
|  10-12-2005, 03:22 PM | 
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| Registered Join Date: Dec 2004 Location: Novato, CA 
					Posts: 3,064
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			You  need to (carefully) pry the back side of the black bezel off the lip of the gauge itself to let you get at the guts of the gauge. once the circuit board inside is exposed, there's an adjustable pot you can tweak to change the speedo reading for a given input from the speedo sensor. If you search here you'll find some more info about it, ianc 
				__________________ BMW 135i. Nice. Fast. But no 911... "I will tell you there is a big difference between driving money and driving blood, sweat and tears." - PorscheGuy79 | ||
|  10-12-2005, 03:33 PM | 
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| Air Medal or two Join Date: Jul 2003 Location: cross roads 
					Posts: 14,122
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			Thankyou
		 
				__________________ D troop 3/5 Air Cav,( Bastard CAV) and 162 Assult Helicopter Co- (Vultures) South of Saigon, U Minh Forest, Delta, and all parts in between | ||
|  10-12-2005, 03:55 PM | 
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| Registered Join Date: Sep 2002 Location: Central Virginia 
					Posts: 414
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			I compared mine to my GPS while on the interstate (82SC) and above 45mph the error was about 5 mph OVERstated.  Paul 
				__________________ Paul '87 Carrera cab; '19 Ford Flex for the Dane and Lab; '17 Tacoma for truck stuff. '96 993 cab (gone, oops); '82 SC (gone) | ||
|  10-12-2005, 04:36 PM | 
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| Retired Member | 
			My 82 SC speedo reads about 10% fast.  Trip meter quit this summer.  Plan to have the speedo send to http://www.nhspeedometer.com/index.htm or http://www.paspeedo.com/about.htm during the winter sleep. 
				__________________ 1982 911 SC Targa - Rosie....my Mistress. Rosewood Metallic on Dark Brown and Black. Long distance road warrior and canyon carver. A few mods - a little interior, some brakes, most suspension and all of the engine. | ||
|  10-12-2005, 06:30 PM | 
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