I know I know.. Mine isn't a 320 or a 360. And I have no idea what the horsepower is anymore. But in regards to the 320/360 airframe, it is pretty quick.
263.909 mph average race speed at the 2010 Reno Air Races (going in a circle)
I see 220 ktas in cruise pretty often, at about 12.5 gph.
And I still want to go faster.
Tom