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On Pirelli Diablo Supercorsas the accepted optimum pressure is 28psi f & r hot (track).
Race 3 as it woz cold & a bit wet I started the day at F33 & R31 & worked my way down as the day/track warmed. I did a PB with this (relatively) poor level of grip (I love these Pirellis).
In the cold & wet the tyre temp gradiant is less so the pit start pressure is higher to get to optimum track pressure, in the heat it's the opposite. Also in the wet higher pressure keep the tread open to clear the water.
In the cold & wet, when grip is a lot less, getting feel from the bike is more important so instead of dropping pressure to get more temp from carcase flex try softening the suspension a bit. If you can read what the bike is telling you about the level of grip then everyone wins & everyone is safer.
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