IMO, any turbo diesel in a V configuration (V/8-V/6-V?), is a compromise in efficiency.
Turbo diesels that have to have exhaust gasses piped from ea. bank of V to a common turbo, seems to me, is an afterthought.
I personally will never own another turbo diesel that doesn't exhaust all cylinders into one common manifold, then into the turbo.
That being said, I'll be keeping an eye on the new V/8 Duramax, that was just developed for the new 1/2 ton GM truck. They exh. from the topside of the heads, into one manifold, into the turbo. All hot exh. gasses travel up to the turbo. I like the
concept.
Ray