At around 6000RPM then ok but at the lower revs e.g. 3000RPM then it should be fine IF adequate cooling is used.
I, personally am running 20psi overboost dropping to 16psi normal. While being mapped I requested a limit to be placed so that the overboost is not able to be used from 4750RPM upwards.
This means if I back off at 5000RPM+ and then floor it again it should only reach 16psi maximum as the Unichip wont allow higher boost at these engine speeds.
When the water injection is fitted in April/May my setup should be as fully reliable as Benny's. Difference being I am only going for 300BHP tops as I want to stay well within transfer box limits as well.
Dont forget that a Phase III kit has been ran fine for 18 months so far in a car in France and its still going.