Polite question wtf are u flying...
"Polite" and "wtf" in the same phrase: not so very polite.
Unpressurised twin at say 180kts should give you a thousand feet a minute...
Why don't you read "life's a beech's" post again? Doesn't unpressurized and pax onboard ring a bell? Do you think your pax (and their ears) would appreciate going down at 1000 ft/min?