Oh...one other thing regarding dynos. The comment was made that meaningful data can't be gained below 3000 RPM. That's only true for the poor folks who have to use hydraulic brakes. The guys developing the engines initially at the OEM manufacturer can get excellent data across the entire range, because they're using AC or DC motoring dynos. WOT or 10% throttle, 10,000 or 500 RPM, it all works for the guys with the good equipment.
As always, it's all about money.