Just a minute. "under no circumstances" is a bit much.
For starters, the PW 985 (450hp) kept blowing heads of at red line MP.
The cure was never over 35", and 30" at lift off.
In a IO 520 Cont. (300hp) any low weight TO I did was climb power only.
I had CHTemp and E.gas temp fitted. All my engines went well over usual overhaul times by legal extensions. The real temp/fuel flow problems were low/hot/and heavy, and then we upped the fuel flow a couple of GP hour. Yeah, we used our common sense, not some homily thought up in an office.
