I've never tried that, but I will. With slicks it's easy to see what's
being used even without chalk. But some of the settings that give the best
appearance (rubber smeared evenly over the tire) don't translate to good
temperatures. All the same, I'll give it a try--I'm game for almost
anything that helps and is legal.
_____
From: Group44TR7@aol.com [mailto:Group44TR7@aol.com]
Sent: Tuesday, April 08, 2003 10:09 AM
To: Bill Babcock; rgk@flash.net; fot@autox.team.net
I would like to suggest that you try the old fashion method of
putting chalk on your tires to see how much of the each tire is being
utilized.
At the beginning of the test session, measure the pressure. Put
chalk completely across the tire from the inside wall to the outside wall
of each tire. After each session, examine the tires to see where the chalk
line has been worn off on each tire. Then increase or decrease tire
pressure just prior to the next session to improve use of the tire contact
path. Put on fresh chalk and remeasure.
A group of us using the same tire did this as a group exercise at
one event after we found out that we were all using very different tire
pressures in our Porsches. We found that our best performance was in the
mid 20s (PSI) on that day with staggered air pressures in our tires. Of
course we were also using the tire pressures to compensate for just a
little oversteer.
Cary
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