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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