Speedo calibration - Ford Powerstroke Diesel Forum
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 12-14-2009, 12:01 PM
O.I.F. Combat Vet 11B
 

Join Date: Jul 2009
Location: tallahassee
Posts: 1,047
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 1 reviews
Speedo calibration

I know they are only 33 in tires but any idea of how much they through off the speedo. Also would the speedo being off also make my odometer wrong too? Just curious about this for oil changes. Didn't know how far off it....
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 12-14-2009, 12:02 PM
Compression Ignition Addict
 

Join Date: Dec 2007
Location: Ocala, Fl
Posts: 1,426
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 1 reviews
Send a message via AIM to no-tel-in
when I ran 33's it was only like .5-1 mph off... and yes it does affect your odo.
Reply With Quote Quick reply to this message
  #3  
Old 12-14-2009, 02:02 PM
O.I.F. Combat Vet 11B
 

Join Date: Jul 2009
Location: tallahassee
Posts: 1,047
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 1 reviews
It would show more on your odometer than you really have correct?
Reply With Quote Quick reply to this message
  #4  
Old 12-14-2009, 02:17 PM
Compression Ignition Addict
 

Join Date: Sep 2007
Location: Corvallis, OR
Posts: 3,121
Thanks: 11
Thanked 18 Times in 17 Posts
Feedback Score: 0 reviews
Anyone nearby that has AE? They could recalibrate the speedo for you. Or you could go to Ford to have it adjusted. But for 1 mile off, I probably wouldn't worry about it...
Reply With Quote Quick reply to this message
  #5  
Old 12-14-2009, 06:00 PM
O.I.F. Combat Vet 11B
 

Join Date: Jul 2009
Location: tallahassee
Posts: 1,047
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 1 reviews
Quote:
Originally Posted by layson View Post
Anyone nearby that has AE? They could recalibrate the speedo for you. Or you could go to Ford to have it adjusted. But for 1 mile off, I probably wouldn't worry about it...
thanks, fig it wasn't much just wanted a second opinion.
Reply With Quote Quick reply to this message
  #6  
Old 12-14-2009, 08:58 PM
Compression Ignition Addict
 

Join Date: Sep 2009
Posts: 209
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
If your stock tires are 265/75R16 your speedometer should read about 57.5 when you are actually going 60mph. Your odometer will also be off by the same amount. Say for every 5000 miles you travel your odometer will only register about 4788 miles.
Reply With Quote Quick reply to this message
  #7  
Old 12-15-2009, 12:49 AM
O.I.F. Combat Vet 11B
 

Join Date: Jul 2009
Location: tallahassee
Posts: 1,047
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 1 reviews
thanks
Reply With Quote Quick reply to this message
  #8  
Old 12-15-2009, 01:57 AM
Other vehicle is an F250
 

Join Date: Jul 2007
Location: N. Pickens County S.C.
Posts: 18,324
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
You can find "calculators" online that will do the math for you, but you can also just calculate the circumference difference. 35s changed mine 7%. I would just add 7% to the miles driven when calculating mpg. I recently discovered that my AE would calibrate the speedo and now it it dead on!
Reply With Quote Quick reply to this message
  #9  
Old 12-15-2009, 02:58 PM
O.I.F. Combat Vet 11B
 

Join Date: Jul 2009
Location: tallahassee
Posts: 1,047
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 1 reviews
AE?? what else can it do?
Reply With Quote Quick reply to this message
  #10  
Old 12-16-2009, 01:56 AM
Other vehicle is an F250
 

Join Date: Jul 2007
Location: N. Pickens County S.C.
Posts: 18,324
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by ju015dd View Post
AE?? what else can it do?
AutoEnginuity Scanner (Scan Tool)
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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 11:10 PM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors