[syr74]

Originally Posted by 8cd03gro

Sequential? How does one design a sequential turbo system for a v-layout?

The same way Porsche used it on the Boxer engined 959 and even some Poerstroke diesels used it. Nothing about a V-engine or any engine with two banks of cylinders inherently prevents the use of sequential turbochargers, particularly since car companies have built them.

Originally Posted by 8cd03gro;

I was under the impression that the v6 ecoboost was of a parallel design. Is there a y-pipe pre-turbo connecting the collectors of each header?

I never said the Ecoboost concept was sequential, I said a performance based, sequential turbo engine could build on the basic Ecoboost concept.

Originally Posted by 8cd03gro;

I have never heard of a sequential system on a v engine.

Note my first comment.

Originally Posted by 8cd03gro

There is simply no need for a sequential setup with a 5.0. A parallel system with proper turbo sizing could deliver boost below 3k rpm and still allow for enormous top-end.

Yep, you could....but more than likely you are going to kill your drivability unless you seriously compromise the power band. If you want to think about why a manufacturer might do something you have to stop thinking like you are at the dragstrip and start thinking like a manufacturer. (most people can't) One of the major complaints about Mercedes AMG V-12 engines is that the power is all but unusable due to a very narrow and hugely powerful powerband.

The GT500 has traction issues now, up the power to ZR1/AMG levels or beyond without thinking about how to measure that delivery and they certainly aren't going to get better. At that point you either live with the problem, which arguably defeats upping the power in the first place, or you solve it. To solve it you can add awd and/or find a way to balance the power output in such a way that it can actually be used without bolting on slicks.

Sequential turbocharging could help because, while it would more than likely reduce low end torque, it would also spread the power out across the power band giving you great torque everywhere and phenomenal and usable peak power..........potentially solving the problems cars like the AMG V-12's suffer from without neutering the power delivery.