As above, tried upping and lowering but still not 100% sure which worked best as Monte Carlo circuit was so tight.
Tried 30 then 35 then 40

 

I doubt they have time to get hot so I would increase the pressures 9particularly at the front) to high 30's (cold)

 

Brad I have to agree with Dunc on this one as the tyres dont get hot enough in the short space of time that you are on track I ran R888's at croft last year and to be honest I upped my pressures but once they got hot I was finding problems with side wall flex lowered them and still found sidewall flex which gave a very unnerving feel through the steering wheel dont get me wrong they are a cracking tyre but not for me I ended up changing them for Dunlop track tyres.For the sprint because of the regs in the standard class I source some new 070 235 bridgestones which came standard on the car solid sidewalls and as my tyre fitter said were a real bitch to get on my rims.