Tyres make a masive difference as well mine on the 700 map is fine on the lanes as long as the R888's are on and its dry (I am sure simon can confirm drivable but fast). The ideal think about the syvecs is at the twist of a swich I can change to 1 of 8 different maps depending on conditions
I still drive relativly fast on the road but the track is the only place you can safley push the car to the full limits