So all cylinder from the right bank blow exhaust gas into the front and rear exhaust ports on the left bank.... Where exhaust gas is also trying to get out?? And the turbo is only driven off the 2 centre cylinders on the left bank? Won't that just choke the engine to death like blocking the exhaust.
Excuse the ignorance but I've never seen a setup like this! I can clearly understand the draw through (cold side) but the exhaust has me baffled.. No pun intended