Deezy
Parking Attendant
Posts: 26
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posted June 04, 2004 11:23 AM
Track Day Tire Pressure???
I have my first trackday tomorrow (Talladega short track) and I need to know at what PSI should my brand new Pirelli Diablo's (120-70 and 190-50)?
  
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zeta xray
Expert Class
Posts: 416
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posted June 04, 2004 01:26 PM
The Pirelli tire dealer at the race track in our part of the world told me to run 2 psi higher than I ran in my Pirelli Supercorsas. I ran 30 front and rear in the Supercorsas. So that should mean 32 f/r on the Diablos.
Elsewhere on this forum someone detailed how to tell if your pressures are too high or too low. He said ideally, you should have a 20% rise in pressure between the cold and hot pressures. So if you start with 30 psi cold, you should have 36 psi hot. What he said sounded reasonable to me.
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Deezy
Parking Attendant
Posts: 26
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posted June 04, 2004 01:38 PM
Thanks a lot. That eases my mind.
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big daddy
Zone Head
Posts: 616
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posted June 06, 2004 08:01 AM
That is indeed correct Zeta.
FYI as a suggestion the front is typically 1-2lbs higher than the rear when using street/DOT race tires.
BD
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