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      09-28-2021, 06:37 AM   #10
beachBmmr
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Drives: 2023 F90 M5 SG/AB
Join Date: Mar 2010
Location: DFW Texas

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Quote:
Originally Posted by pikcachu View Post
Quote:
Originally Posted by beachBmmr View Post
Ran 4 sessions today optimizing for pressures, and looking at temps.


Took Temps with an infrared thermometer directly off track.

The track I run on (Eagles Canyon) is hard left turns mostly, so passenger side gets a beating. This was after a long session on track with a cool down lap, and is surface temps, so they drop relatively quickly.

Out Cen Ins Ins Cen Out
DRV FR 149 146 156 PASS FR 159 168 174
DRV RE 136 133 148 PASS RE 155 149 157

What this tells me, is there is some additional negative camber needed up front and not really any needed in the rear.
Seems to me that you were a bit under inflated on all tires but for the passenger front...
usually temps should be either even or ascending in one direction but your center is always colder than the sides....

what PSI did you run...? PASS FR is about perfect... the rest to me are under inflated... would add 2psi but for pass front and check temps again next time
Also Pyrometer is the best for taking the temps as it will automatically average the readings...like this https://www.longacreracing.com/produ...38;prodid=7295
I was really trying to dial in pressure. Was using the track connect app with the cup2 connects adjusting mid run. I did 5 sessions tweaking pressure and watching temps

My fastest run had these temps which showed more uniform across tread

Out Cen Ins. Ins Cen Out
DRV FR 150 150 150 PASS FR 170 162 162
DRV RE 147 142 140 PASS RE 146 152 152

This was my hot pressure/temps - app wanted 32-33 psi hot and it worked. Tires were noticeably quieter and grippier at a 32@180 around track

After letting the car sit, these were the ambient pressures

Ambient Pressures:
27@97 26@91
27@82 28@88
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2023 F90 M5
Retired - 2021 G82, 2019 440xi, 2020 X7, 2019 X5, 2013 F10, 2010 F10
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