Notices
Racing & Drivers Education Forum
Sponsored by:
Sponsored by:

991 tire pressures

Thread Tools
 
Search this Thread
 
Old 11-29-2012, 11:29 AM
  #1  
limey940
Three Wheelin'
Thread Starter
 
limey940's Avatar
 
Join Date: Sep 2007
Posts: 1,600
Likes: 0
Received 1 Like on 1 Post
Default 991 tire pressures

Getting excited for my first official track time this weekend.
Can anyone give me a sense of what hot tire pressures i should be looking at?

thanks
Old 11-29-2012, 02:14 PM
  #2  
coryf
Rennlist Member
 
coryf's Avatar
 
Join Date: Aug 2001
Location: Charleston SC
Posts: 1,364
Received 128 Likes on 65 Posts
Default

Start at what porsche recommends on the door sticker cold. Don't worry too much about the cars handling your first time. Focus on the track and driving smooth. Have fun!
Old 11-29-2012, 02:43 PM
  #3  
limey940
Three Wheelin'
Thread Starter
 
limey940's Avatar
 
Join Date: Sep 2007
Posts: 1,600
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by coryf
Start at what porsche recommends on the door sticker cold. Don't worry too much about the cars handling your first time. Focus on the track and driving smooth. Have fun!
Thanks for the response, but having done a couple of unofficial track days in my previous 997 and noticing how the handling went of when the pressures got up to 50 lb im trying to figure out what hot temps should be.
if anyone can help that would be great

cheers
Old 11-29-2012, 05:18 PM
  #4  
stuttgart46
Rennlist Member
 
stuttgart46's Avatar
 
Join Date: Nov 2005
Location: Duluth, GA
Posts: 2,254
Received 27 Likes on 21 Posts
Default

We were running a 997T on Tuesday. After my student started pushing the car a little the pressures got up to 50 lbs. I could feel it skating a bit so we took out 5-6 lbs from the rears and 2-3 from the fronts. The TPMS was yelling at us but the handling was much better. I think we finished the next session around 47 rear and 45 fronts. He was running Michelins.
Good luck.
Old 11-29-2012, 05:27 PM
  #5  
hlee1169
Pro
 
hlee1169's Avatar
 
Join Date: Dec 2006
Location: Bay area, California
Posts: 567
Received 1 Like on 1 Post
Default

I usually keep my front tires around 34~35 hot, and rear 37~38 hot. But I am running on 19" Michelen PSS instead of the OEM 20" Pirelli PZero's. However, I did notice that the grip went away when the tire pressure got into 40's, on both PSS and PZero's.

I would suggest you get a pyrometer to measure the tire tread temperature right after a session, I found it far more useful in adjusting my tire pressures then just simply guessing.
Old 11-30-2012, 10:09 AM
  #6  
limey940
Three Wheelin'
Thread Starter
 
limey940's Avatar
 
Join Date: Sep 2007
Posts: 1,600
Likes: 0
Received 1 Like on 1 Post
Default

Thanks a lot guys
cheers



Quick Reply: 991 tire pressures



All times are GMT -3. The time now is 02:56 AM.