Go Back   Honda-Tech > Honda and Acura Technical Forums > Tech/Misc
Sign in using an external account
Register Forgot Password?
Search


Welcome to Honda-Tech!
Welcome to Honda-Tech.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Honda-Tech community today!


Reply
 
 
 
submit to reddit
 
LinkBack Thread Tools Search this Thread
Old 01-25-2009, 07:34 PM   #1
Honda-Tech Member
 
freakasis's Avatar
 
Join Date: Jul 2005
Location: near tampa, fl
Posts: 749
iTrader Rating: (0)
Default how to adjust speedo?

does anyone make somthing to adjust the speedo on a civic? i searched and all i could find was stuff for honda motorcycles. i hate having to subtract 9% and then trying to figure out how to go 5mph over the limit.
freakasis is offline   Reply With Quote
Old 01-27-2009, 05:29 PM   #2
Honda-Tech Member
 
freakasis's Avatar
 
Join Date: Jul 2005
Location: near tampa, fl
Posts: 749
iTrader Rating: (0)
Default Re: how to adjust speedo?

anyone?
freakasis is offline   Reply With Quote
Old 01-27-2009, 06:02 PM   #3
Honda-Tech Member
 
TunerN00b's Avatar
 
Join Date: Jun 2004
Location: Sherman Oaks, CA, United States
Posts: 7,438
iTrader Rating: (0)
Default Re: how to adjust speedo?

10% is considered acceptable error for a speedometer.

How have you determined that it is inaccurate? Are you using the correct tire size?
TunerN00b is offline   Reply With Quote
Old 01-27-2009, 06:19 PM   #4
Honda-Tech Member
 
freakasis's Avatar
 
Join Date: Jul 2005
Location: near tampa, fl
Posts: 749
iTrader Rating: (0)
Default Re: how to adjust speedo?

no im not. i know how off it is because i calculated the tire size differance and i have checked it against police radar. i know what the standards are, but i dont think any amount is acceptable.
freakasis is offline   Reply With Quote
Old 01-27-2009, 06:41 PM   #5
Honda-Tech Member
 
TunerN00b's Avatar
 
Join Date: Jun 2004
Location: Sherman Oaks, CA, United States
Posts: 7,438
iTrader Rating: (0)
Default Re: how to adjust speedo?

Quote:
Originally Posted by freakasis View Post
i know what the standards are, but i dont think any amount is acceptable.
A stock tire for my car is a 195/55-15, with a diameter of 23.5". With 10/32" of tread standard and 2/32" tread at end of life, we're already talking about a 1/2" diameter (3%) change during the course of its life just from wear. When should the speedo be accurate, with new tire, dead tires, or half way worn?

Then we get to account for the fact that pressure changes the rolling diameter of the tire, and we get further inaccuracy. Weight in the vehicle also changes the rolling diameter.

So, shy of GPS based speed detection, I don't think any of us have ever really had truly accurate speedometers.

And thats just the long way of me saying, "I really have no clue how to adjust the damn thing.".

Hope you find the answer you're looking for. Though, the "correct" answer to adjusting the speedo is to use the correctly sized tires.
TunerN00b is offline   Reply With Quote
Old 01-28-2009, 06:20 AM   #6
Honda-Tech Member
 
freakasis's Avatar
 
Join Date: Jul 2005
Location: near tampa, fl
Posts: 749
iTrader Rating: (0)
Default Re: how to adjust speedo?

thanx for the help...maybe ill try and wire in a variable resistor into the speedo itself so i can adjust it....not sure if thats possible. i guess ill be reading some circuit diagrams in the future.
freakasis is offline   Reply With Quote
Old 07-29-2010, 09:53 AM   #7
Honda-Tech Member
 
basil's Avatar
 
Join Date: Sep 2007
Location: Marysville, WA, USA
Posts: 55
iTrader Rating: (0)
Default Re: how to adjust speedo?

I know this is an old thread, but did you ever figure it out???
basil is offline   Reply With Quote
Old 08-03-2010, 11:53 AM   #8
Trial User
 
Join Date: Aug 2010
Posts: 4
iTrader Rating: (0)
Default Re: how to adjust speedo?

Honda won't be able to reprogram because the ECU doesn't control the speedo. The VSS generates a square wave signal which is directly feed into the speedo, and the on-board integrated circuit transforms that signal to the needle motor. For that you can contact your nearest Honda service station.
__________________
[url=http://www.giftsbull.com/]Gifts[/url]
robinmarkk is offline   Reply With Quote
Old 08-07-2010, 02:01 PM   #9
Honda-Tech Member
 
BrianZ's Avatar
 
Join Date: Mar 2003
Location: Pleasanton, Ca
Posts: 928
iTrader Rating: (0)
Send a message via ICQ to BrianZ Send a message via AIM to BrianZ
Default Re: how to adjust speedo?

http://www.yellr.com/
__________________
Norcal HC Director
1995 Integra Lss
Honda Challenge H2 #3
BrianZ is offline   Reply With Quote
 
 
 
submit to reddit
Reply

Tags
adjust, adjusting, adjustment, civic, del, element, honda, motorcycle, motorcycles, resistor, sol, speedo, speedometer, tires, variable

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 11:41 PM.



2014 Copyright, InternetBrands Inc.
Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.

Honda and the Honda marquee are registered trademarks of the American Honda Motor Company, Inc. Neither American Honda Motor Company nor its subsidiaries or affiliates shall bear any responsibility for Honda-Tech.com content, comments, or advertising. Honda-Tech.com is not affiliated with American Honda Motor Company in any way. American Honda Motor Company does not sponsor, support, or endorse Honda-Tech.com in any way. Copyright/trademark/sales mark infringements are not intended or implied.
Emails & Contact Details