Donutz
07-12-2010, 07:02 PM
I've been researching tire PSI settings in preparation for Track school and other events. In my quest for knowledge I stumbled across the following article that explains tire PSI tuning in pretty good detail (actually there are a number of good articles on this site). The article is written from the perspective of racing (extended run times) as opposed to autox, however, it does explain the difference.
http://www.turnfast.com/tech_handling/handling_pressure
Default User
07-12-2010, 10:05 PM
Thanks a lot.
Now I'm going to be reading this all day at work and get absolutely nothing accomplished (work-wise)
If I get fired - it's all your fault
Fobio
07-13-2010, 09:16 AM
a digital pressure gauge and a temp/pyro meter are necessities...however, for track school, it's best to focus on the driving and the feedback the instructor is giving you. of course, full analysis of of g-forces, throttle/brake positions, heart rate, etc will also be useful, but these other factors can be distracting.
having said that, I follow the rules but having used the same tire spec for the past 2 yrs, I know where to set my "cold" temps to achieve within 1 - 2 PSI of my desired "hot temp"...depending on your driving style and car spec, my hot temp doesn't necessarily translate to your "hot temp" PSI...
using the pyrometer also helps with noticing left/right bias or the course's turns and how over/under inflated you may be...but once you know what you're optimal "hot temp" psi should be, it shouldn't be an issue, but should still be monitored.
for track school, Ian will recommend a certain PSI to prevent "rolling over" on an under inflated tire. This is important to prevent teh student from feeling the squirelly feeling of a not warmed tire...to illustrate the point, bring a piece of chalk and mark the side of your tire and see how much you roll on it...this piece of chalk will be the most useful piece of equipment in the beginning...
once you've achieved a stable setup and driving style, you can then start to lower the pressures a bit to be more aggressive...but by how much, I'll leave it to Ian. =)
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