Simulated hundreds of OEI in B55's over many years and 12", full fine never failed me. Retard mixture til it ran smoothly, otherwise was horribly over rich. Temp generally held steady.
The real shutdown was the part I hated most. Cringing at the CHT needle dropping that rapidly was something I was glad to only have to do once per student.
I found minimal, if any difference in performance with one feathered compared to 12".
Careful doing EFATO. Have your hands right there, plenty of students tried to feather the live engine no matter how many times we briefed, touch drilled etc... And I'm with aimpoint: always the mixture to simulate the failure
