Speedometer question - Ford Powerstroke Diesel Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 24 Old 06-28-2009, 10:23 AM Thread Starter
Super Moderator

 
Eric's Avatar
 
Join Date: Mar 2007
Location: Mt. Washington, Ky.
Posts: 8,226
Thanks: 0
Thanked 12 Times in 11 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 6 reviews
Speedometer question

We went to a wedding last night that was out in the middle of nowhere. I put the gps in my truck and away we went. That was the first time I'd ever had the gps in my truck. Anyway, I would be running 60 mph going by the speedo and the gps said I was doing 64. I've got 35's on my truck but I didn't think it would throw it off that much. Does 4 mph off sound right with 35's

Eric@Powerstroke.org

Early 99 F250 with a bunch of extra junk...
Eric is offline  
post #2 of 24 Old 06-28-2009, 10:25 AM
Banned
 
Join Date: Dec 2008
Posts: 2,850
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
That sounds about right. My truck was off 2 mph with just 285/75R16s.
03-blue-Powerstroke is offline  
post #3 of 24 Old 06-28-2009, 10:27 AM Thread Starter
Super Moderator

 
Eric's Avatar
 
Join Date: Mar 2007
Location: Mt. Washington, Ky.
Posts: 8,226
Thanks: 0
Thanked 12 Times in 11 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 6 reviews
Quote:
Originally Posted by 03-blue-Powerstroke View Post
That sounds about right. My truck was off 2 mph with just 285/75R16s.
Really? I knew it would be off a little but I thought 4 mph seemed a little high. Guess I need to start watching my speed a little more

Eric@Powerstroke.org

Early 99 F250 with a bunch of extra junk...
Eric is offline  
post #4 of 24 Old 06-28-2009, 10:31 AM
Banned
 
Join Date: Dec 2008
Posts: 2,850
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
In Pa we have all of these message boards that tell you your speed. With the combanation of that and my dads gps I figured I was about 2 mph off.
03-blue-Powerstroke is offline  
post #5 of 24 Old 06-28-2009, 10:32 AM
Compression Ignition Addict
 
Join Date: Jul 2007
Posts: 5,627
Thanks: 7
Thanked 15 Times in 15 Posts
Mentioned: 0 Post(s)
Quoted: 5 Post(s)
Feedback Score: 0 reviews
mine is 2mph off with 235/85/16's

Quote:
Originally Posted by Ianstew
There is a difference in a government acting responsibly within their powers, and a government that just decides what their powers are and what responsibility means based on political whimsy.
ianstew is offline  
post #6 of 24 Old 06-28-2009, 10:49 AM
Compression Ignition Addict
 
cliford's Avatar
 
Join Date: Dec 2008
Location: IN
Posts: 1,856
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
mine is way off. although remeber the faster you go the more the speedo will be off.

soon to go?:
2000 f-250

soon to come?:
6.4 and spartan
cliford is offline  
post #7 of 24 Old 06-28-2009, 11:18 AM
Compression Ignition Addict
 
CoalRollinRoosterCruiser's Avatar
 
Join Date: Oct 2007
Location: Asheville/Fairview, NC
Posts: 4,783
Thanks: 15
Thanked 4 Times in 4 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Should be about 10% off or thereabouts with 35's

Jonathon or John Although technically i have a list of nicknames the length of I-95, so call me what ya like



Current Truck--1999.5 F350 ext cab short bed SRW Lariat 4x4 ZF-6. 4" lift, 35's, exhaust, intake, chip, and more.
CoalRollinRoosterCruiser is offline  
post #8 of 24 Old 06-28-2009, 11:18 AM
Compression Ignition Addict
 
BadAss01F250's Avatar
 
Join Date: Mar 2007
Posts: 177
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by cliford View Post
mine is way off. although remeber the faster you go the more the speedo will be off.
+1

With 35's my speedo was pretty accurate until around 40mph, by the time I hit 60 it was off by 5mph

  • 2001 7.3L
  • 6 Inch lift, 36x16.50x16.5 Dick Cepek's
  • K&N FIPK II, Custom Straight Pipe Exhaust, TS 6 pos
  • AIH Delete, Dual Relief Valve ++, Banks Big Head Wastegate
  • Full Custom Stereo









15.39 @ 85.54 MPH
2.05 60ft
.003 R/T
BadAss01F250 is offline  
post #9 of 24 Old 06-28-2009, 01:26 PM Thread Starter
Super Moderator

 
Eric's Avatar
 
Join Date: Mar 2007
Location: Mt. Washington, Ky.
Posts: 8,226
Thanks: 0
Thanked 12 Times in 11 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 6 reviews
Quote:
Originally Posted by BadAss01F250 View Post
+1

With 35's my speedo was pretty accurate until around 40mph, by the time I hit 60 it was off by 5mph
I didn't think about it being farther off the faster you go. I'll have to keep the gps in there for a few days so I can see how much it's off at what speed so I don't get a ticket

Eric@Powerstroke.org

Early 99 F250 with a bunch of extra junk...
Eric is offline  
post #10 of 24 Old 06-28-2009, 01:27 PM
Mob boss

 
Jarrod B's Avatar
 
Join Date: Jul 2008
Location: Austin Texas
Posts: 26,951
Thanks: 25
Thanked 27 Times in 25 Posts
Mentioned: 2 Post(s)
Quoted: 148 Post(s)
Feedback Score: 1 reviews
Quote:
Originally Posted by ianstew View Post
mine is 2mph off with 235/85/16's
thats a stock size and its still off?

im running 265/75/16

2006 Ford F250 CCSB FX4 6.0

Sold
1997 F350 CCLB 2WD 7.3
1999 F350 CCLB 4WD 7.3
2003 F350 CCLB FX4 6.0





LSP Chapter Director

LSP Group Threads
http://www.powerstroke.org/forum/lon...-powerstrokes/
Jarrod B is offline  
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:
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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome