991.2 track tire pressures
#1
991.2 track tire pressures
Does anyone have some tried and proven ultimate hot race track tire pressure settings for 991.2 running 20" Pirelli P Zeros? I have been running my 2017 cab on Area 27 and have experienced pressure increase up to 15 psi, to over 50, which surprises me.
#2
Race Director
Depends on the track, driver and alignment settings.
Rule of thumb is with a advanced driver a tire will heat up around 8-10 psi. Seems most tires run best hot from around 30-34 front and 32-36 rear...again depends on the tire, driver, track and alignment settings.
Rule of thumb is with a advanced driver a tire will heat up around 8-10 psi. Seems most tires run best hot from around 30-34 front and 32-36 rear...again depends on the tire, driver, track and alignment settings.
#3
Thanks for that mdrums. To clarify please: do you mean the pressures you quoted are the STARTING pressures when cold, or the ultimate pressures after they have risen 8-10 psi?
#4
Race Director
Ultimate hot pressure. Starting pressure will depend on outside air temperature and hot fast hard you drive and heat tires up.
#5
Pro
Same question. The door sticker calls out 37/44psi for the P-Zeros, max inflation is 50psi. Assuming advanced driver on a day with moderate ambient temperature (say 75 degrees), factory alignment, and on a short track (Laguna), what pressure would you start from? I don’t have a pyrometer and on my next track day the thing I want to focus on is tire pressure.
#6
Same question. The door sticker calls out 37/44psi for the P-Zeros, max inflation is 50psi. Assuming advanced driver on a day with moderate ambient temperature (say 75 degrees), factory alignment, and on a short track (Laguna), what pressure would you start from? I don’t have a pyrometer and on my next track day the thing I want to focus on is tire pressure.
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#9
Glad it helped, keep adjusting to what works best for you. Everyone drives a little different, has a different set up, car, etc, so what works best for you might be a slightly different.
Mark
Mark