2013 no more twin turbo

Was at the dealer today and the associate was telling me that the new 13 models do not have twin turbo anymore. When/why did BMW go to single turbo? Was it 2011 or just this year? I always thought twin turbos gave the car more power.

...the 35i was never a twin-turbo. E70 never got the N54. E70 has always had the N55, ever since the LCI

The only twin-turbo E70s they have left are the 50i and 35d. N55 uses a twin-scroll single turbo setup.

I guess I interpreted the "Twinpower Turbo Technology" at bmwusa incorrectly.

http://www.bmwusa.com/Standard/Conte...and_Specs.aspx

Originally Posted by jyeh74

I guess I interpreted the "Twinpower Turbo Technology" at bmwusa incorrectly.

Twin scroll turbo, their naming convention isn't the clearest.

Originally Posted by jyeh74

I guess I interpreted the "Twinpower Turbo Technology" at bmwusa incorrectly.

http://www.bmwusa.com/Standard/Conte...and_Specs.aspx

Apparently both you and the sales associate made the same mistake?

There is no hard and fast ruie on how many turbos are best...2 better than one? three better than two? Sequiential turbos? All a matter of overall design....

actually I believe 35d is not technically twin-turbo, but bi-turbo (with different size of turbos)

Originally Posted by kanar200

actually I believe 35d is not technically twin-turbo, but bi-turbo (with different size of turbos)

Bi-turbo usually refers to using the same size turbos and the run independently driven by the exhuast of certain cylinders, like the N54 uses 2 turbos, each being driven off the exhaust of 3 of the cylinders or the older Audi 2.7T where each half of the V6 had a turbo. The M57 in the 35d does use different size turbos in a sequential setup.

well, English is not my first language (obviously), but twin-turbo means for me that the two turbos are THE SAME (twin) size

Originally Posted by kanar200

well, English is not my first language (obviously), but twin-turbo means for me that the two turbos are THE SAME (twin) size

Right, the same as a bi-turbo, you're referring to a parallel twin-turbo config.

OK, what is the correct nomenclature for turbo setup in 35d? it is not twin-turbo (different size turbos), it is not in your opinion bi-turbo (although prefix "bi" means just two)

It's a sequential turbo config

I've read that the twin scroll turbo was better than the N54 twin turbo on the 5 series forums. Same power output as previous with the torque band starting at 1,200 rpm instead of 1,500 rpm.