MotoHouston.com MotoHouston.com
Register Members List Member Map Media Calendar Garage Forum Home Mark Forums Read

Go Back   MotoHouston.com > General Discussion > Taking it to the Track
Forgot info?

Welcome to MotoHouston.com! You are currently viewing our forums as a guest which gives you limited access to the community. By joining our free community you will have access to great discounts from our sponsors, the ability to post topics, communicate privately with other members, respond to polls, upload content, free email, classifieds, and access many other special features. Registration is fast, simple and absolutely free, join our community!

Register Today!

If you have any problems with the registration process or your account login, please contact us.


FREE MH Decals by MAIL!

Advertisement

Reply
Share This Thread: 
Subscribe to this Thread Thread Tools
Old 02-24-2013, 06:08 PM   #1
plummer
dude
 
plummer's Avatar
 
Join Date: Aug 2010
Location: dickinson
Feedback Rating: (0)
Posts: 1,509


Bike(s):
k8 600
k13 600








Question Tire pressures at the race track? school me please!

So what's it all about.

How different are your pressures in warm weather compared to cold? My buddy let me barrow a laser temp gun not made specifically for checking tires or anything but played with it at the track and was reading temps fresh off the track of @ 140-155f. I had no idea tires got that warm.

I know less psi means larger contact patch but does psi also effect surface temp? I guess I'm looking for the everything about tire pressure 101. What's the ideal psi or growth after hot and are there
+/-'s with higher and lower?

I've had qualified people tell me to run 22-28 on bt003rs and tell someone else 30-32 on different rubber....remember thinking does tire brand make that much of a difference in the same conditions?

Anyways school me please
plummer is offline   Reply With Quote
Similar Topics
Thread Thread Starter Forum Replies Last Post
tire pressures Chuckster Performance and Modifications 20 06-06-2013 01:50 PM
Tire pressures on the track??? j_e_hurst Taking it to the Track 25 08-14-2012 06:33 PM
Tire pressures Patrick General Discussion (Moto Related) 36 10-31-2011 09:06 PM
Cold track and tire pressures maxgs Taking it to the Track 37 10-14-2009 11:41 AM
Chek Your Tire Pressures! Patrick How To's and Q & A's 13 12-28-2007 02:48 PM
Advertisement
Old 02-24-2013, 06:28 PM   #2
Bevo
Hook 'em!
 
Bevo's Avatar
 
Join Date: Mar 2009
Location: Houston-The South Loop
Feedback Rating: (0)
Posts: 24,322

Experience: 10+ years
Trackdays: 3

Bike(s):
'12 CBR1000RR Red/Black
'14 CB1000R Matte Gray
'10 CBR1000RR (destroyed)
'09 CBR1000RR C-ABS (sold)
'09 CBR600RR C-ABS (sold)

Member Garage





To lower the surface temp raise your PSI, and vice versa. I have no idea what optimal surface temps for tires are, but if they get too hot, they lose grip. Probably a good base would be to measure the temps right when the tire warmers come off.
__________________
Quote:
Originally Posted by bumblebee View Post
"I lack skillz"
Bevo is online now   Reply With Quote
Old 02-24-2013, 06:42 PM   #3
r6racer
track
 
r6racer's Avatar
 
Join Date: Dec 2012
Location: Houston
Feedback Rating: (4)
Posts: 8,582

Experience: 2 years
Trackdays: 10+

Bike(s):
2008 Yamaha R6 Race/track
2012 Yamaha WGP R6
2004 Kawasaki KLx250 2-stroke
2008 Yamaha R6 Street *Sold*
2005 Yamaha R6 Track *Sold*

Member Garage





yeah i wanted to ask the same thing, how much psi should i have in my q2's cold on my 929rr? front/rear. back road riding, on track and occasional trip to work on it, short distance 15 min ride
__________________
r6racer is offline   Reply With Quote
Old 02-24-2013, 06:43 PM   #4
plummer
dude
 
plummer's Avatar
 
Join Date: Aug 2010
Location: dickinson
Feedback Rating: (0)
Posts: 1,509


Bike(s):
k8 600
k13 600








I don't have warmers yet. Next question, how hot do warmers get tires?
plummer is offline   Reply With Quote
Old 02-24-2013, 06:44 PM   #5
Racerxxx
CMRA #92
 
Racerxxx's Avatar
 
Join Date: Aug 2012
Feedback Rating: (1)
Posts: 2,524












Quote:
Originally Posted by plummer View Post
I don't have warmers yet. Next question, how hot do warmers get tires?
My moto d's have a digital temperature gauge on them. Not had a problem with them.
Racerxxx is offline   Reply With Quote
Old 02-24-2013, 06:55 PM   #6
ninenine
cmra expert
 
ninenine's Avatar
 
Join Date: Dec 2012
Location: Houston
Feedback Rating: (0)
Posts: 1,677

Experience: 10+ years
Trackdays: 10+

Bike(s):
2015yzf-r6 A-bike
2012yzf-r6 B-bike








Best advice I can give you is ask the tire vendor for the tires you run versus asking members here and getting a variety of answers half of which don't know.

In your case you run Bridgestones so that would be John Hutchinson @ SCRC. He will be with me at the track @ msrh when you go on the 9th and 10th ask him there. Fwiw, the pressures change depending on weather and set up on the bike.
__________________
CMRA#99
WERA#99
Sponsors:HoPD,P1 Racing,SCRC,Pirelli,Arai,BD Racing,Vesrah,Vortex,VP Race Fuels,Optimal Racing,Motul
ninenine is offline   Reply With Quote
Old 02-24-2013, 06:58 PM   #7
QUICKGIXX
track track track
 
QUICKGIXX's Avatar
 
Join Date: Jan 2009
Location: Spring, Tx
Feedback Rating: (1)
Posts: 1,128

Experience: 6 years
Trackdays: 10+

Bike(s):
07 gsxr 600(race bike)
2005 ttr90(pit bike)
01 kx65 mini motard







I believe that most tire warmers are in the ball park of 175 for dot's/ slicks. slightly lower setting for rain tires
QUICKGIXX is offline   Reply With Quote
Old 02-24-2013, 07:05 PM   #8
r6racer
track
 
r6racer's Avatar
 
Join Date: Dec 2012
Location: Houston
Feedback Rating: (4)
Posts: 8,582

Experience: 2 years
Trackdays: 10+

Bike(s):
2008 Yamaha R6 Race/track
2012 Yamaha WGP R6
2004 Kawasaki KLx250 2-stroke
2008 Yamaha R6 Street *Sold*
2005 Yamaha R6 Track *Sold*

Member Garage





Quote:
Originally Posted by 392 View Post
Best advice I can give you is ask the tire vendor for the tires you run versus asking members here and getting a variety of answers half of which don't know.

In your case you run Bridgestones so that would be John Hutchinson @ SCRC. He will be with me at the track @ msrh when you go on the 9th and 10th ask him there. Fwiw, the pressures change depending on weather and set up on the bike.
hmmmm this does make more sense, thanks mike i'll see the dunlop guy at msrh on the 9th hopefully
__________________
r6racer is offline   Reply With Quote
Old 02-24-2013, 07:22 PM   #9
gots2no
Steve
 
gots2no's Avatar
 
Join Date: Feb 2012
Location: Pearland
Feedback Rating: (0)
Posts: 936

Experience: 10+ years
Trackdays: 10+

Bike(s):
'94 Kawasaki ZX6
'78 Yamaha XS750E (sold)
'82 Yamaha Seca 750 (sold)
'82 Yamaha XT200 (sold)

Member Garage





Read on the internet that a Dunlop representative recommends 2-4 psi growth on the front and 6-8 psi growth tire pressures from cold to hot at the track.

On my last track day at MSRH, I started with 26 psi in both the front and rear. Immediately after pitting, my front grew to 30 (4 psi delta) and my rear grew to 32 (6 psi delta). My tires are Dunlop Q2 Sportmax. I'll probably start out with 28F and 26R next time. I checked the psi growth after a couple of sessions and it was consistent.
gots2no is offline   Reply With Quote
Old 02-24-2013, 07:24 PM   #10
plummer
dude
 
plummer's Avatar
 
Join Date: Aug 2010
Location: dickinson
Feedback Rating: (0)
Posts: 1,509


Bike(s):
k8 600
k13 600








I'm not really looking for the perfect number. More so why its that number. Just interested to know.
plummer is offline   Reply With Quote
Old 02-24-2013, 07:24 PM   #11
351fox
BRAWP BRAWP
 
351fox's Avatar
 
Join Date: Sep 2011
Feedback Rating: (3)
Posts: 558

Experience: 1-3 months
Trackdays: 10+


06 gsxr 750








Quote:
Originally Posted by Umayr View Post
yeah i wanted to ask the same thing, how much psi should i have in my q2's cold on my 929rr? front/rear. back road riding, on track and occasional trip to work on it, short distance 15 min ride
Far from an expert, but when I had q2's, 36 f/r worked great on the street and I think at the track it was around 29f 26-27r running no warmers.... If whoop is doing tires at your next TD he should be able to give you a good starting point.
351fox is offline   Reply With Quote
Old 02-24-2013, 07:26 PM   #12
plummer
dude
 
plummer's Avatar
 
Join Date: Aug 2010
Location: dickinson
Feedback Rating: (0)
Posts: 1,509


Bike(s):
k8 600
k13 600








Quote:
Originally Posted by QUICKGIXX View Post
I believe that most tire warmers are in the ball park of 175 for dot's/ slicks. slightly lower setting for rain tires
Wow that is HOT! Crazy I would not have thought.
plummer is offline   Reply With Quote
Old 02-24-2013, 09:00 PM   #13
ninenine
cmra expert
 
ninenine's Avatar
 
Join Date: Dec 2012
Location: Houston
Feedback Rating: (0)
Posts: 1,677

Experience: 10+ years
Trackdays: 10+

Bike(s):
2015yzf-r6 A-bike
2012yzf-r6 B-bike








Quote:
Originally Posted by plummer View Post
I'm not really looking for the perfect number. More so why its that number. Just interested to know.
There is a'lot that goes into it. Brand tire, compound (super soft,soft,md,hard), temperature, bike setup, etc.
__________________
CMRA#99
WERA#99
Sponsors:HoPD,P1 Racing,SCRC,Pirelli,Arai,BD Racing,Vesrah,Vortex,VP Race Fuels,Optimal Racing,Motul
ninenine is offline   Reply With Quote
Old 02-24-2013, 09:04 PM   #14
Tojo92
AKA Mongo
 
Tojo92's Avatar
 
Join Date: Jul 2007
Location: Cedar Park, TX
Feedback Rating: (7)
Posts: 5,142

Experience: 10+ years
Trackdays: 10+

Bike(s):
1994 Ducati 900 SS/SP
2003 Honda CRF450R motard
2002 Husqvarna NOX
2001 KTM Duke II






I'll second asking the track tire vendor of your brand choice.

I bug John almost all the time...different tracks, different temperatures. He always gives solid reliable advice.

The other vendors do for their brands as well.
__________________
CMRA#665 (neighbor of the beast)
The Problem - Endurance
Tojo92 is offline   Reply With Quote
Old 02-24-2013, 09:10 PM   #15
Bevo
Hook 'em!
 
Bevo's Avatar
 
Join Date: Mar 2009
Location: Houston-The South Loop
Feedback Rating: (0)
Posts: 24,322

Experience: 10+ years
Trackdays: 3

Bike(s):
'12 CBR1000RR Red/Black
'14 CB1000R Matte Gray
'10 CBR1000RR (destroyed)
'09 CBR1000RR C-ABS (sold)
'09 CBR600RR C-ABS (sold)

Member Garage





Quote:
Almost all tire compounds (street legal and racing slicks) are working well at temperatures between 145 & 185 degrees Fahrenheit. We see 175F as the most common operating temperature, but it certainly depends on your form of motorsport. Just because you are sweating and hot doesn't mean your tires are hot. Some qualifying tires need to be as hot as 210 F.
http://www.chickenhawkracing.com/faq.php

DTC graph
__________________
Quote:
Originally Posted by bumblebee View Post
"I lack skillz"

Last edited by Bevo; 02-24-2013 at 09:12 PM.
Bevo is online now   Reply With Quote
Old 02-24-2013, 09:41 PM   #16
x-ray
CMRA #228
 
x-ray's Avatar
 
Join Date: Feb 2009
Location: NW Houston (Jersey Village area)
Feedback Rating: (1)
Posts: 1,084

Experience: 9 years
Trackdays: 10+

Bike(s):
2015 KTM Super Adventure
2007 SV650S (My track toy)
07 CRF230F
2006 VFR800a (sold - covered a lot of miles)
04 Honda 599 (sold)



Quote:
Originally Posted by 351fox View Post
If whoop is doing tires at your next TD he should be able to give you a good starting point.
I believe he said 32 psi for a Q2. Sounded a couple of pounds high, but I think if you dig on the dunlop racing site, it'll say the same thing.

Here's a good start:
http://dunlopracing.com/technical-info/
Here's the blurb on the technical faq page:
If you are riding on the race track, a good starting point is 32 front and 32 rear.
__________________
Sloan - Iron # 42900
2015 KTM Super Adventure
07 Suzuki SV650s - CMRA #228
x-ray is offline   Reply With Quote
Old 02-24-2013, 10:17 PM   #17
plummer
dude
 
plummer's Avatar
 
Join Date: Aug 2010
Location: dickinson
Feedback Rating: (0)
Posts: 1,509


Bike(s):
k8 600
k13 600








Quote:
Originally Posted by Bevo View Post
That's badass thanks!
plummer is offline   Reply With Quote
Old 02-25-2013, 12:39 AM   #18
r6racer
track
 
r6racer's Avatar
 
Join Date: Dec 2012
Location: Houston
Feedback Rating: (4)
Posts: 8,582

Experience: 2 years
Trackdays: 10+

Bike(s):
2008 Yamaha R6 Race/track
2012 Yamaha WGP R6
2004 Kawasaki KLx250 2-stroke
2008 Yamaha R6 Street *Sold*
2005 Yamaha R6 Track *Sold*

Member Garage





From their website

Tire pressures for Q2′s? And do I use a tire warmer on them?

If you are riding on the street, read your owners manual for recommended tire pressures. If you are riding on the race track, a good starting point is 32 front and 32 rear. After riding on the track and before you go on the street, let your tires cool, then adjust back to the pressures recommended in your bikes owners manual, Warmers are optional, but if you choose to use them, you can get tire warmer recommendations here http://www.dunlopracing.com/Warmers.pdf .
__________________
r6racer is offline   Reply With Quote
Old 02-25-2013, 06:59 AM   #19
Bevo
Hook 'em!
 
Bevo's Avatar
 
Join Date: Mar 2009
Location: Houston-The South Loop
Feedback Rating: (0)
Posts: 24,322

Experience: 10+ years
Trackdays: 3

Bike(s):
'12 CBR1000RR Red/Black
'14 CB1000R Matte Gray
'10 CBR1000RR (destroyed)
'09 CBR1000RR C-ABS (sold)
'09 CBR600RR C-ABS (sold)

Member Garage





Quote:
Originally Posted by x-ray View Post
Here's a good start:
http://dunlopracing.com/technical-info/
Here's the blurb on the technical faq page:
If you are riding on the race track, a good starting point is 32 front and 32 rear.
Those pressure from Dunlop are for race tires.
__________________
Quote:
Originally Posted by bumblebee View Post
"I lack skillz"
Bevo is online now   Reply With Quote
Old 02-25-2013, 09:12 AM   #20
Mr.337
skinny kid racing ftw
 
Mr.337's Avatar
 
Join Date: Nov 2011
Location: by MSRH
Feedback Rating: (3)
Posts: 1,014

Experience: 4 years
Trackdays: 10+

Bike(s):
07 gsxr 600 race bike
03 KX 6five (TMGP bike)
07 R6 street (sold)
09 r6 race bike (sold)






Quote:
Originally Posted by QUICKGIXX View Post
I believe that most tire warmers are in the ball park of 175 for dot's/ slicks. slightly lower setting for rain tires
You don't run warmers with rain tires. You purposely hit puddles on the track to keep them cooler. Other wise rains will start to shred from the temp. And dunlop rain race tires I run 31/31 cold work great for me. And I 3rd or 4th getting with your tire vendor at the track let you know what psi to set them at. And may recommend slightly different based on how hot or how cold it that day vs a baseline of like 19-21 rear 27-29 front *my cold temps off warmers for dunlop 211 UK's depending on temperature and track I use those ranges to set cold psi. Pm me If you have questions.
__________________
CMRA #979
TMGP #979 F5 2013 F5N & Backwards N class champ
I flash Yamaha ECU's
Mr.337 is offline   Reply With Quote
Reply


Thread Tools

Advertisement


All times are GMT -5. The time now is 09:17 PM.


MotoHouston.com is not responsible for the content posted by users.
Privacy Policy