Naw, nothing beats the initial, unmuffled start-up of BB V8 "to break it in" around dawn . . after all, gotta git it back in the pickemup to git to work tomorrow morning.
Garage with concrete floor, metal door overhead is best.
Second best is a MolaSoak: fire that puppy up after soaking 3-ozs LC in each cylinder overnight. Do not wait for the morning breeze.
And, last (but not just in passing) a leaf blower with NO MUFFLER is keen. Keening, like a banshee. Work a long time between buildings to get the effect at it's best.