First thing I will say is that you are running too lean, hence ok on the groung and then dies in flight when the prop unloads. Try the pinch test ... or point the plane veritical and then tune the high end. After that give it a few clicks rich.

Sorry to have to tell you this but the VMAX engine sucks big time, they are lovely 1st or 2nd gallon, after that its kinda like hell. Tuning is most difficult, a few flyers here have that problem. Experienced flyers facing problems tuning that engine.