Brinn, I am digging up info about the Yamaha patent. I have also found some nice pictures of the Lincoln LS 3L Duratec that also appears to take advantage of this technology. Here are two pics of the butterfly valve in the passage between the two banks of intake runners:
When I head home from work, later today, I will be popping the hood to see where a equalizing tube can be placed. the butterfly valve might be actuated much later in the development. Maybe in conjunction with the secondaries? Intriguing!
