ZPOST
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   ZPOST > BMW Z4 Technical Talk > Track / Autocross / Dragstrip / Driving Techniques
  TireRack

SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS!
Post Reply
 
Thread Tools Search this Thread
      04-04-2013, 09:36 AM   #1
3002 tii
Major General
United_States
134

 
3002 tii's Avatar
 
Drives: flat out
Join Date: Apr 2008
Location: NNJ


Posts: 8,488
iTrader: (49)

Garage List
Tire Pressures Uneven After Hot Laps

I start the session with even pressures, typically 32 cold all 4 and check when come back the paddock. I noticed however at the last event, both my right side tires were 2lbs higher than the 2 lefts, why is that? Is it the nature of the track, having more right handed turns and the right side tires working more?
__________________

Recaro | Volk | AST | Vorshlag | Quaife | Stoptech | Active Autowerke | BMW Performance

Click here for my track videos
Appreciate 0
      04-04-2013, 09:41 AM   #2
Kgolf31
Brigadier General
37

 
Kgolf31's Avatar
 
Drives: 2007 Z4MC, 2012 128i
Join Date: Sep 2008
Location: Ohio


Posts: 3,289
iTrader: (3)

Sounds about right. Just the nature of the track.

Happens to me fairly often in autocross. I'll either cook the left or right front tire depending on the layout and then I'll start running different pressures on the left and right side
__________________
12 128i Coupe - Project STX: TCKline l Active Autowerke l APEX l Vorshlag l Dunlop l Hawk l BMW Performance

Appreciate 0
      04-04-2013, 09:57 AM   #3
a_riddler
Bimmer Noob
United_States
6

 
a_riddler's Avatar
 
Drives: 08 Z4MC;08 MBZ E350 4Matic
Join Date: May 2010
Location: Seattle, WA


Posts: 529
iTrader: (5)

+1, very common autox-ing.
__________________

08 Z4MC /// DKF Exhaust, Underdrive pulleys, Stubby, RPI Scoop, Clutch Stop, TCK Coilovers, Strong-Strut, Apex EC-7's,
APR Splitter/Wing, AFE Intake, Matte Grill, ZHP Shift Knob, UUC Tranny Mounts, Stoptech SS brake lines, CF Badges
Appreciate 0
      04-04-2013, 11:36 AM   #4
gmd2003
Major
17

 
gmd2003's Avatar
 
Drives: 2014 CP M6 and 2006 VT 525 Z4M
Join Date: May 2012
Location: South Carolina


Posts: 1,386
iTrader: (0)

A given track can have significantly more turns in one direction versus another. At my home track Roebling road it kills the left side. My temps are 4 degrees hotter on the left F/R despite using Nitrogen!! Thats why its key to take regular tire temps, and check pressures during the course of your day. Once you know what to expect you can plan accordingly. For instance I start off at 28PSI on the left and 30 PSI with Nitrogen on the right now at this track.
Appreciate 0
      04-09-2013, 06:35 PM   #5
kklin
Private First Class
2

 
Drives: BMW Z4 M Coupe
Join Date: Jul 2011
Location: PA


Posts: 198
iTrader: (1)

Quote:
Originally Posted by DSC_OFF View Post
I start the session with even pressures, typically 32 cold all 4 and check when come back the paddock. I noticed however at the last event, both my right side tires were 2lbs higher than the 2 lefts, why is that? Is it the nature of the track, having more right handed turns and the right side tires working more?
Most road race courses are clockwise, so I'm surprised it isn't your left side pressures that are higher.
__________________
P1Gear.com thanks you for your patronage!
Appreciate 0
      08-05-2013, 01:37 PM   #6
Racer20
First Lieutenant
United_States
7

 
Drives: F80 M3, E46 ZHP Sedan
Join Date: May 2009
Location: Ann Arbor, MI


Posts: 343
iTrader: (0)

On my track car (Mini Cooper S with Star Specs) I shoot for 39psi hot at all 4 corners, and adjust after each session to keep it there.
Appreciate 0
Post Reply

Bookmarks

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
Forum Jump


All times are GMT -5. The time now is 05:48 AM.




zpost
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST