With new rear tires, 34,000 service miles on the old, I took the car in to get a 4-wheel alignment. I explicitly asked for zero camber and minimum toe:
- Initial camber (L/R): -1.40 / -1.53
- Final camber (L/R): -1.44 / -1.43
- Tire pressures: 34 psi front, 41 psi rear
Initial driving impression, wallowing but the tires are not properly inflated. So my plan is to benchmark the car using my IR camera to record the temperature distribution after high speed runs late at night.
First I'll inflate the tires and re-run the test. Next, I'll raise the car and adjust the camber on both rear wheels towards -0.5 and re-run the test.
I want the thicker, outer tread to offload the inner tread. My goal is to even the temperature, slightly towards the outer, thicker tread. We have nearly 1 degree of camber so there is freedom to experiment. Handling will be a separate investigation.
I'll probably first look at a little more rear toe while monitoring the tire temperature distribution. I don't want to scrub the tires. As I explained to the technician, I have to steer the car anyway so rolling stability is not that important.