Mark the sidwalls and keep at it . Just enough air to keep off of the side walls.
If your marks say add air, go up 2# each time and remark.
450 / 475 is not out of range.
@ 475 I think that you can raise the rear pressure up to almost 45#. If not, swap the springs.
550 rear can work but needs less pressure, thus rolls less good. "less good" HA,
I am trying to put less rubber on the road when straight ahead.
Edit. I take pressure readings in the paddock. The temps will equalize across the tread face, but the pressures will stay pretty high.
As long as you take the pressures around the same amount of time from the track, the readings will give a valid indication of dynamic pressure. You either need more , less or are good. the actual value is not important. If you find that you 50# to keep it off of the side walls , than you need more camber of course.
I run my cars sideways up the straights, (the LR toed out,) so I often need 4 different pressures.
MM
MM
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