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 01-15-2015, 02:41 AM   #1
I am my own mechanic....
 
Timco's Avatar
 
Join Date: Feb 2013
Location: Salt Lake City, UT
Posts: 3,433
Boxster quiz..

Please provide the following values, 04 S 6-sp, 17' wheels. Displayed value, no math needed. MPH, please....

6th gear, 3K on tach = ?

5th gear, 4k on tach = ?

4th gear, 5k on tach = ?

Please feel free to try to stump the rest of the forum with your little known facts.

Mr. Raby, please no internal engine values.

__________________
'04 Boxster S 50 Jahre 550 Spyder Anniversary Special Edition, 851 of 1953, 6-sp, IMS/RMS, GT Metallic silver, cocoa brown leather SOLD to member Broken Linkage.
'08 VW Touareg T-3 wife's car
'13 F150 Super Crew long bed 4x4 w/ Ego Boost
Timco is offline   Reply With Quote
Old 01-15-2015, 06:47 AM   #2
Registered User
 
Chuck W.'s Avatar
 
Join Date: Sep 2008
Location: Agoura Hills (LA) So.Cal.
Posts: 1,574
6th gear, 3K on tach = 75 MPH actual - 78 MPH displayed

5th gear, 4k on tach = 81.5 MPH actual - 84 MPH displayed

4th gear, 5k on tach = 82 MPH actual - 85 MPH displayed

Repost....

I have a GPS in the car and look at the true MPH / RPM. In sixth gear for every 2,000 RPM there is a 5 MPH change. In 5th gear there is a 4 MPH change for every 2,000 MPH. This is on my car and my GPS. Errors may exist due to operator error, tach off, GPS MPH off. But, here is what I came up with.

'01 S 6 Speed

6th Gear...............5th Gear

RPMs......MPH........RPMs.......MPH
2600......65...........2600.......53.5
2800......70...........2800.......57.5
3000......75...........3000.......61.5
3200......80...........3200.......65.5
3400......85...........3400.......69.5
3600......90...........3600.......73.5
3800......95...........3800.......77.5
4000......100..........4000.......81.5
__________________
1995 Porsche C4 Cab

2016 BMW M2, 6 Speed LBB - ED 7/2016
1997 993 Cab - Sold; 1997 993 Turbo - Sold
2001 Boxster S - Original Owner - 30K Miles -SOLD

Last edited by Chuck W.; 01-15-2015 at 01:37 PM.
Chuck W. is offline   Reply With Quote
Old 01-15-2015, 03:14 PM   #3
Beginner
 
Jamesp's Avatar
 
Join Date: Mar 2013
Location: Houston
Posts: 1,659
Garage
So is there any way to make the speedometer accurate? Even the meanest beater has an accurate speedometer. This is the one thing that bugs me every time I drive the box.
__________________
2003 S manual
Jamesp is offline   Reply With Quote
Old 01-15-2015, 03:27 PM   #4
Registered User
 
Chuck W.'s Avatar
 
Join Date: Sep 2008
Location: Agoura Hills (LA) So.Cal.
Posts: 1,574
Quote:
Originally Posted by Jamesp View Post
So is there any way to make the speedometer accurate? Even the meanest beater has an accurate speedometer. This is the one thing that bugs me every time I drive the box.
Nope... we are stuck with 3 MPH high readings. Over the years there have been countless discussions regarding this issue and the brightest minds could never find a fix.
__________________
1995 Porsche C4 Cab

2016 BMW M2, 6 Speed LBB - ED 7/2016
1997 993 Cab - Sold; 1997 993 Turbo - Sold
2001 Boxster S - Original Owner - 30K Miles -SOLD
Chuck W. is offline   Reply With Quote
Old 01-15-2015, 05:48 PM   #5
On the slippery slope
 
JayG's Avatar
 
Join Date: Mar 2014
Location: Austin and Palm Springs
Posts: 3,793
Garage
I like the fact that mine reads 3-4 mph high. give me a little buffer when driving fast

__________________
2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY
2004 996 Targa Tip
Instructor - San Diego region
2014 Porsche Performance Driving School
2020 BMW X3, 2013 Ram 1500, 2016 Cmax, 2004 F-150 "Big Red"
JayG is offline   Reply With Quote
Post Reply


Thread Tools
Display Modes

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 05:18 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page