Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Post Reply
 
LinkBack Thread Tools Display Modes
Old 08-26-2008, 02:05 PM   #1
Registered User
 
Join Date: May 2008
Location: OKC, OK
Posts: 3
check against gps

That was the first clue. Speed on the GPS was about 7% lower than speedometer. Checked against mile markers over a 50 mile stretch of interstate and got about the same answer.

Don't remember tire size off the top of my head and car is in shop for maintenance and to look at the issue.
rockdoc1949 is offline   Reply With Quote
Old 08-26-2008, 02:40 PM   #2
Registered User
 
Join Date: Dec 2006
Location: Austin, TX
Posts: 939
This is entirely 'normal'. Buddy had a 99 996, and it was the same. My 2001 is the same. Heck, my motorcycle is the same.

I believe it probably has something to do with the calibration erring on the side of caution. You are less likely to get speeding citations if you're actually going slower than you think you are.

It also limits liability of the manufacturer. Can you imagine if your speedo indicated SLOWER than you were going? By 5-10mph at highway speeds? That's the difference between a speeding ticket or not.

Anyway. That's the way it is. There's nothing 'wrong' with your car.
__________________
2001 Boxster - Grey on Grey
1969 911T Targa - 'Stinky'

http://www.zoto.com/frayadjacent/img...f27a-4a399.jpg <---- my car. ^ crap I post.

"The existence of the flamethrower is evidence that someone, somewhere once said 'I want to set those people over there on fire, but I don't want to have to walk over there to do it.'"
FrayAdjacent is offline   Reply With Quote
Post Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 06:39 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page