70 psi in tires - 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 08-03-2008, 06:53 AM
Compression Ignition Addict
 

Join Date: Apr 2007
Posts: 1,542
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
70 psi in tires

I know our trucks call for 65 (20" rim package), but what if we went 5 over to 70? that's the way my truck came from the dealer. I might try them at that setting and take a wear pattern vs the 65 pattern. The tires say 80 Max so... Figure if I can gain any MPG's it's worth the stiff ride.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 08-03-2008, 07:21 AM
Compression Ignition Addict
 

Join Date: Apr 2007
Location: North East,Md.
Posts: 1,594
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
(1)You should base you tire pressure on the door plate versus your load......my 07 was delivered 25 pounds under inflated from the dealer. 50 versus 75 lbs
(2) If you live somewhere that the roads are perfect ,you might see a gain. If not ,your energy losses will move to your shocks and suspension. If you are wrong about the road conditions,you will slip belts on your tires,wear out your ball joints in record time and probably loose road contact at the worst possible time.
Reply With Quote Quick reply to this message
  #3  
Old 08-03-2008, 08:00 AM
Compression Ignition Addict
 

Join Date: Dec 2006
Location: Lockport IL
Posts: 4,297
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 7 reviews
Send a message via AIM to dereku
If you want a nice smooth ride, use the psi that the manual or door plate reccomends, if you want maximum tire wear use the tires suggested psi. Thats what tire manufactures do to get the proper psi. They look for the best wear.
Reply With Quote Quick reply to this message
  #4  
Old 08-03-2008, 09:04 AM
Banned

 

Join Date: Jan 2008
Location: Belle Chasse
Posts: 3,445
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
you will gain MPG,...but your going to were out the centers of your tires quick.


You'll have to figure out if the gain in mileage will offset the cost of new tires.



Here's a page from my library.


TIRE AIR PRESSURE



A lot of people ask about tire pressure, if you've ever changed your tires from the EXACT stock ones,..IGNORE THE INFO ON YOUR DOOR!

each brand has it stamped on the side of the tire,..which is good,...but it's only a starting point.

Proper tire pressure will help fuel mileage,and tire wear.

As you can see in the pic below, if you have a certain type of uneven tire wear,..this is why.
.
.
.
.

.............Too little.............................too much......................................just right



Too little air pressure will also cause the tire to grind the plys internally, and possibly rupture.

The PROPER way to get the pressure right is...the tire chaulk test.

For a good explanation on how to do a chalk test...click the clink

Google Image Result for http://www.jeepfan.com/tech/TirePres...ureCutAway.jpg
Reply With Quote Quick reply to this message
  #5  
Old 08-03-2008, 11:03 AM
Compression Ignition Addict
 

Join Date: Apr 2007
Posts: 1,542
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
I'll stick with the door jamb specs.
Reply With Quote Quick reply to this message
  #6  
Old 08-03-2008, 11:05 AM
Compression Ignition Addict
 

Join Date: Mar 2006
Location: Valley Station, KY
Posts: 275
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
i have nitto terra grapplers 275/75/20 and i run 72psi of nitrogen. My tires ride good and are wearing perfect
Reply With Quote Quick reply to this message
  #7  
Old 08-03-2008, 11:06 AM
Compression Ignition Addict
 

Join Date: May 2007
Location: America
Posts: 6,783
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
JBakerFX4 you should just sell your PSD and get a prius.
Reply With Quote Quick reply to this message
  #8  
Old 08-03-2008, 12:16 PM
Compression Ignition Addict
 

Join Date: Dec 2007
Location: Flint, MI
Posts: 4,062
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
On my 16" rims w/ 285/75's I run 75psi cold, which makes for 80psi running. In the snow I'll run 65 or 70 in the rears. That's just me, but mine are wearing perfectly (and they're Firestones). And I've never looked at the door for that crap. The door don't know what tires I got on my rig does it, and there's no guarantee that's even the door it came off the line with since I'm not the first owner.
Reply With Quote Quick reply to this message
  #9  
Old 08-03-2008, 02:07 PM
Compression Ignition Addict
 

Join Date: Apr 2007
Posts: 1,542
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
2005F250- Just trying to maximize what I have. I can think of better cars than a prius... that thing is gay. I rather have a Chopper bike or something. The mpg's on my truck aren't that bad now... but was just wondering what folks ran their tires at.
Reply With Quote Quick reply to this message
  #10  
Old 08-03-2008, 03:12 PM
Compression Ignition Addict
 

Join Date: Dec 2007
Location: Flint, MI
Posts: 4,062
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by JBakerFX4 View Post
2005F250- Just trying to maximize what I have. I can think of better cars than a prius... that thing is gay. I rather have a Chopper bike or something. The mpg's on my truck aren't that bad now... but was just wondering what folks ran their tires at.
HAHA "Y'know what it sounds like when you drive by?" "No what's that?" "mmiiiiIIIIII'mgay..."
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 10:39 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