[aston@ultrasw.c]

I spent some time at the track recording tire temps and pressures.

I started at high pressures and worked my way down.

I did 5 hot laps to make sure everything was up to temp.

Car is an 86 911 weighing 2,350 running Nitto NT01s 255/225

The tires were past their best. Pressures are hot. No cool down.

....Temperature...................Pressure
....Lo ..Lc.. Li....Ri...Rc.. Ro.... L....R

F 160 165 169 167 158 142 _ 33 33
R 165 174 189 183 172 158 _ 35 36

F 162 167 171 171 167 156 _ 32.5 32.5
R 169 178 190 189 176 167 _ 34 33

F 160 162 165 167 149 144 _ 29.5 30
R 163 171 185 180 165 158 _ 32 32

F 162 165 169 160 149 149 _ 29 29
R 169 174 180 180 169 162 _ 31 31

F 160 162 158 160 151 145 _ 27.5 27.5
R 167 174 181 181 174 160 _ 29.5 30

F 151 154 156 160 145 144 _ 25 25
R 154 163 171 169 162 156 _ 27 27

This is my first attempt at analyzing such data so here goes:

Higher pressures result in a greater temp range across the tire: up to 14 deg.
Lower pressures reduce the temp range to 8 approx.
Run lower pressures.

Inside edge is significantly higher than center or outside. Particularly at the rear.
Camber is -3 in the front and -2 in the rear.
Reduce camber to -2.5 and -1

Make adjustments and repeat.

How does that sound?