So I got my 64.5/73/.91 from Taylor today... I gotta say, its clear why they are far better...
Side by side comparison with an old box 366:
[ame="http://s72.photobucket.com/user/loneobjectivist/media/Fortynine/DSC01648_zpsrteaynzh.jpg.html"]DSC01648_zpsrteaynzh.jpg Photo by loneobjectivist | Photobucket[/ame]
[ame="http://s72.photobucket.com/user/loneobjectivist/media/Fortynine/DSC01649_zpsm7moxnjt.jpg.html"]DSC01649_zpsm7moxnjt.jpg Photo by loneobjectivist | Photobucket[/ame]
[ame="http://s72.photobucket.com/user/loneobjectivist/media/Fortynine/DSC01650_zpsn37pwqlk.jpg.html"]DSC01650_zpsn37pwqlk.jpg Photo by loneobjectivist | Photobucket[/ame]
[ame="http://s72.photobucket.com/user/loneobjectivist/media/Fortynine/DSC01651_zpst2ndxwet.jpg.html"]DSC01651_zpst2ndxwet.jpg Photo by loneobjectivist | Photobucket[/ame]
The sweep on the new turbine wheel is better, but the shape also allows more flow past the tip exits...
I originally though the 64.5 wheel was shorter than the 66 wheel, but they are the same, the housing and shaft lengths are different, which makes me think BW has some ideas up their sleeve...
[ame="http://s72.photobucket.com/user/loneobjectivist/media/Fortynine/DSC01652_zpscmzhfyeq.jpg.html"]DSC01652_zpscmzhfyeq.jpg Photo by loneobjectivist | Photobucket[/ame]
All around on board with these new units...