Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

tyre pressure for track use


Recommended Posts

yesterday i was tracking at montmelo track (barcelona) and think i had too much pressure in my tyres. i started with 2.7bar at rear and 2.3 in front but after 15 minutes they were allready very high. witch would be the "good" pressure to start with? would it be good idea to stop to take some air out when it gets to certain pressure?

car is 997s and tyres contis (not good at all to my opinion)

breaks were really great with no signs of getting tired. thats really a great thing use to my bmw.

thanks

Link to comment
Share on other sites

I'm not sure about cars, but with motorcycle roadracing we would look for a 10% rise in pressure between cold and hot. If we got more our starting pressure was too low, less meant we were starting too high. After this we would go by feel as to how it felt handling wise and during braking.

Link to comment
Share on other sites

You should focus on your hot pressures. I think something like 2.7 BAR (rear) and 2.5 BAR (front) would be a good goal when you come in from a session on the track. Figure that your pressure will increase on the track by 0.3 to 0.4 BAR to set your starting pressure at the beginning of the day. After that, just use the hot pressure to make adjustments and ignore the cold/warm pressure before you start a session. At the end of the day, let the car cool down, then set the pressures a little above your normal cold street pressures.

It sounds like you started out too high.

Cheers,

Kevin

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.