yeah those dam Continentals, Always treat with respect.
I think you may find that most Continental IO540 can rull max power indefinately, but most certainly the turbo models i have flown have a 5 min max such as the C210t,
however the Cirrus Sr22 doesnt have a limit on max continuous which is full power.
Im sure it will be unfortunately due to all the temperature cycles that the poor engine goes through! ouch