BMW announces next generation engine families will share up to 60% of their parts between motors, same blocks

[fundahl]

I dont see an issue, 3 cylinders go to one turbine housing inlet. The inlet is split, so what? Its not like 3 cylinders have to merge to 2 then to one. Twin scroll doesnt mean anything except that the housing is partitioned, it still has one inlet flange or in the case of the N55 and N54 with welded manifolds; one inlet.

The n54 twin turbo setup would not work well with twin-scrolls because it's hard to balance exhaust flow when you split a runner in half and merge it with two full sized runners.

have you seen a twin scroll flange? it doesnt have one inlet....