Pressure advice on 710's (in stock class cars) is all over the place from low 30's to high 40's. On my CS miata, I saw big improvements when I upped the pressure from the low 30's to 38 to 39. On the type R I run with a friend, we run 44 F and 58 rear (under avg. conditions).
A friend (Chuck Bower) bought some 225/45-17's for his MSP at the beginning of the season. He asked me for pressure advice and I suggested he run the same pressure that we run in the Type R. He proceded to beat me in raw time (for reference, I placed in the trophies at Nats last year). A 'meaningless' cone cost him the deserved win. The next day he took top pax (out of a field of 160 people including many trophy winners), so I think the pressures I suggest are a good starting point.
This event was an eye opener for me in that I feel Chuck and I are equals and yet the MSP seemed superior to the Type R on that day. He probably simply out drove me, but the MSP, despite being down on power, is a contender, esp. on the 'new' 710's on the 225/45 tire.