tyre pressures vs tyre temps

[ozracer]

Is there a correlation between temps and pressures. ie will starting with a low pressure result in a higher or lower tyre temperature? I would have thought a higher pressure would result in a higher temp, but then i was thinking that with a lower pressure there is increased sidewall flex which generates more heat.

Another question is for sedan circuit racing, do yuo pump the tyres up or let them down in the wet? I know the go-karters pump them up to make the tyres stand up, but some people have told me that you let them down in the wet as you get more grip and the sidewalls work harder allowing the tyre to get up to its operating temperature.