this is on a m3, we tried lots of diff pressures, when we dropped down to 25psi cold and driver was not happy at all, then went back up to low 30,s 15mins later he comes back in with a grin saying loads better, checked hot @42 psi, we where surprised too?
never got on with v70,s went off too quick, and its not nice buying a new tyre with 3mm tread..