Welcome to the North American Subaru Impreza Owners Club Wednesday July 30, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Click here to visit TireRack
Tire & Wheel Forum sponsored by The Tire Rack

Losing traction? Need new tires?
Click here to visit the NASIOC Upgrade Garage...
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Tire & Wheel

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, 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 free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 11-24-2004, 10:56 AM   #1
Lordhowe
Scooby Specialist
 
Member#: 35265
Join Date: Apr 2003
Chapter/Region: MAIC
Location: Delaware / Northern VA
Default What tire pressure?

I just installed a set of 225-45-17 Pzero Nero m+s. what's a good tire pressure that i should stick around?

thx alot, maybe i should post this in newbie section
* Registered users of the site do not see these ads.
Lordhowe is offline   Reply With Quote
Old 11-24-2004, 10:59 AM   #2
fliz
Scooby Guru
 
Member#: 30342
Join Date: Nov 2002
Location: #blp
Default

39F-36R

Honestly, it depends on your driving style and suspension. I prefer higher pressures.

I would either start at the door panel recommendation for 17s (I think it's 36) and go up until it's too stiff or start at 40-42 and go down until it's too soft.

I always keep the fronts 3-4 lbs higher than the rears to keep the center diff happy.
fliz is offline   Reply With Quote
Old 11-24-2004, 12:16 PM   #3
Jfrankon
Scooby Newbie
 
Member#: 20254
Join Date: Jun 2002
Chapter/Region: Tri-State
Vehicle:
2010 VW GTI
2013 Outback 3.6R

Default

I have the same tire in the same size. I currently run 37F/34R on my P7s. IIRC, the recommended tire pressure on the door panel is for 215/17s, and is really low.

Good luck
Jfrankon is offline   Reply With Quote
Old 11-24-2004, 12:22 PM   #4
Lordhowe
Scooby Specialist
 
Member#: 35265
Join Date: Apr 2003
Chapter/Region: MAIC
Location: Delaware / Northern VA
Default

thx a bunch!
Lordhowe is offline   Reply With Quote
Old 11-24-2004, 01:23 PM   #5
pezman04wrx
Scooby Specialist
 
Member#: 66558
Join Date: Jul 2004
Chapter/Region: NESIC
Location: MA
Default

Quote:
Originally Posted by fliz

I always keep the fronts 3-4 lbs higher than the rears to keep the center diff happy.
^^^ How does keeping the tire pressure on the fronts help out the center diff? More rear end traction because of the lower pressures? Just curios ... Thx ...
pezman04wrx is offline   Reply With Quote
Old 11-24-2004, 01:37 PM   #6
fliz
Scooby Guru
 
Member#: 30342
Join Date: Nov 2002
Location: #blp
Default

Quote:
Originally Posted by pezman04wrx
^^^ How does keeping the tire pressure on the fronts help out the center diff? More rear end traction because of the lower pressures? Just curios ... Thx ...
there's more weight in the front, so if you keep the pressures the same, the front tires will compress more and have a smaller effective rolling radius than the rears. Keeping the rear tires lower keeps the effective diameter the same and reduces the decel whine often heard on our cars.

P.S. I should point out that I don't have any proof of this theory, but it makes sense to me and I've heard of people increasing the pressure differential between the fronts and rears to reduce deceleration whine from the transmission.
fliz is offline   Reply With Quote
Old 11-24-2004, 01:43 PM   #7
porque
Scooby Specialist
 
Member#: 57102
Join Date: Mar 2004
Chapter/Region: MAIC
Default

39F-37R here on same exact tires. One thing I've noticed is proper tire pressure makes the biggest difference for steering feel than any other mod I've done so far.
porque is offline   Reply With Quote
Old 11-25-2004, 01:40 AM   #8
Lordhowe
Scooby Specialist
 
Member#: 35265
Join Date: Apr 2003
Chapter/Region: MAIC
Location: Delaware / Northern VA
Default

I'm currenly sitting on 38-36, and it think this is perfect for my set up. Thx again everyone!
Lordhowe is offline   Reply With Quote
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 Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
what tire pressure to run stock? and what is a good aftermarket tire? jay25RS Tire & Wheel 6 06-13-2011 01:54 PM
new wheels and tires, what tire pressure? nickster Tire & Wheel 5 06-10-2004 12:28 AM
What tire pressure do you guys use for 17" 215 tires? V6 Brakes, Steering & Suspension 4 05-02-2002 04:00 PM
What tire pressure do your guys use? V6 Brakes, Steering & Suspension 18 09-06-2001 03:41 PM
What tire pressures have you found good with the stock RE92 on Bay Area roads whomR Bay Area Impreza Club Forum -- BAIC 7 07-28-2001 07:16 PM


All times are GMT -4. The time now is 02:25 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.