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I know that in the morning at Ron Fellows the Z51s indicated low air pressure and when I asked them, they said they will heat up quickly out on the track. So I presume that is the same logic you are reading in your manual.
 

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Thanks for the confirmation, but I think it is ironic that I did an HPDE in a competitive brand and they pumped the tires up to 50 psi. Not sure what the difference is. When I first read the 26 psi, I thought it was an error and was concerned that you would lose the tire bead on the rim under hard cornering with reduced pressure. Learned something new.
 

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Thanks for the confirmation, but I think it is ironic that I did an HPDE in a competitive brand and they pumped the tires up to 50 psi. Not sure what the difference is. When I first read the 26 psi, I thought it was an error and was concerned that you would lose the tire bead on the rim under hard cornering with reduced pressure. Learned something new.
Hmmm, starting out at 50 psi sounds dicey. Most auto tires list 51 psi as max pressure, and a tire that starts at 50 will exceed that after a couple laps.
 

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I just did a track day and followed the 26psi and it worked great. Also, keep in mind for any stock car, the "normal/cold" PSI is not what is on the tire, but instead is what is listed on the inside part of the driver door. PSI can vary quite a bit for diff cars. For the vette this is 30. So for the track you lower PSI a bit partially to compensate for the higher PSIs you ultimately will get as the tires heat up quite a bit more than they would when doing normal driving
 
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