Suspension tweaks based on these tire temps?

[Daytona Dan]

I have been tracking my IRS Coupe for a couple seasons now and am finally getting to a solid baseline where I can begin to fine tune and work on shaving off a second here and there per lap with more seat time. At the end of last trackday season I finally bought a tire pyrometer, the Longacre model with 12 temp memory.

My best laps at Watkins Glen last October (just under 2.12) yielded the following temps noted below. Bear in mind that these temps are not hot pit stops, but were taken by me after rolling back into the paddock and jumping out of the car so overall temps would definitely be higher.

124/120/133 135/107/105

131/134/142 142/127/124

Based on these temps I think our tire widths are OK (i.e. within the acceptable heat range), but it looks as though we need to put a bit more positive camber back into the car based on the readings across the tires. I am currently at Negative 1.9 Front / Negative 1.5 Rear with 295 / 335 Hoosier R6s at about 20-21 psi. I am considering taking out a bit of the negative camber based on these readings, particularly the passenger side because the passenger side inside/outside temp differential is more extreme (20 – 30 degrees differential) than the driver side (10 degree differential).

Any thoughts on the overall temps and how close I am to an even temp distribution across the tires? That's what I am trying to get to, right?

[Gordon Levy]

See post on other site.

[CraigS]

I agree that your right sides look like they could use a little less negative camber but I'd try a little more pressure first.All your centers are low. Could be a little more pressure would also even out the spread a little. I also often wonder how much spread inside to outside is ok. I think that maybe cool down lap, easing to pits, etc may keep the inside a little hotter. Would be trick to be able to see temps in action wouldn't it? Also, don't forget that most of the turns are right handers so the inside of the right side tires is getting pulled abnormally compared to a left hand turn.If you reduce the right side neg. camber you may loose grip in left hand turns.