The new 335i on the dyno! (vid too!)

[bmwmike]

heres what we've been waiting for. The new 335i twin turbo (technically bi-turbo i believe) puts out more along the lines of 350 bhp/360 ft lbs, rather than the claimed 300/300. Watch the video near the bottom. The thing flies through third pretty quickly. Good work BMW. Looks a lot better in these pics too. Much like the new 6, itll probably be more appealing in person.

http://www.automobilemag.com/features/news/0609_2007_bmw_335i_dynamometer/

[Bimmerfanatik]

Wow.

Saw a new 325i in whatever dark blue they're using now (still Avus?) on the highway today. Slight rain, and he had the parking lights/halos on. Looked absolutely fantastic. I've definitely fallen for the new 3er's.

The coupes are going to be BA. A factory twin turbo? Yes please :)

[nando]

I don't like the tailights on that.. reminds me of a mid 90's dodge or something. who knows though, the E90 has grown on me a bit, saw a nice carbon black one today. it was kinda fun to park my car next to it and compare..

[Jand3rson]

What's the difference between bi-turbo and twin-turbo?

[Bimmerfanatik]

What's the difference between bi-turbo and twin-turbo?

bi-turbos are in europe and twin-turbos are in the us

[e30sd]

i think it's mostly regional differences in nomenclature, although maybe one refers to sequentially sized turbos vs two same sized turbos (like a supra vs 300zx.

[Bimmerfanatik]

i think it's mostly regional differences in nomenclature, although maybe one refers to sequentially sized turbos vs two same sized turbos (like a supra vs 300zx.

I don't think sequential has anything to do with them being the same size - if I remember correctly, there's two types of twin turbo - two same sized turbos, one on either cylinder exhaust bank, providing equal boost at the same time. Then there's the other, that has a smaller turbo that spools up fast and feeds a larger turbo that would take longer to spool if the smaller turbo wasn't used - basically helps cut down on turbo lag.

I may be wrong though. Just something I read.

And I still think bi-turbo and twin-turbo is like pop and soda.

[e30sd]

Then there's the other, that has a smaller turbo that spools up fast and feeds a larger turbo that would take longer to spool if the smaller turbo wasn't used - basically helps cut down on turbo lag.

that's what sequential is. one big, one small, in sequence on the bank, like an i-6 i.e. supra turbo, or bmw 335i.

[Jand3rson]

Well, I ask because I remember when the Audi RS6 came out, it was always referred to as a "Bi-turbo V8".

[Bimmerfanatik]

that's what sequential is. one big, one small, in sequence on the bank, like an i-6 i.e. supra turbo, or bmw 335i.

Right, but it's called "sequential" because of the way the turbos are spooled, not because of the difference in size.

[golde30]

that's what sequential is. one big, one small, in sequence on the bank, like an i-6 i.e. supra turbo, or bmw 335i.

which is also the def. of a bi-turbo.... twin turbo would be like on a z32 300zx turbo, which is a V6 with a turbo on each side of the engine.

[e30sd]

am i speaking greek? jesus, my fault for wasting all that time getting a degree. lol.

[golde30]

am i speaking greek? jesus, my fault for wasting all that time getting a degree. lol.

i like posting threads into loops, makes for better quality post whoring.

[Bimmerfanatik]

am i speaking greek? jesus, my fault for wasting all that time getting a degree. lol.

Are we on the same page here? lol. All I'm saying is that you can have a sequential turbo setup with two turbos the same size, one large and one small, or vice versa. The most efficient is to use a smaller first, then a larger one - but the difference in size is not what makes the setup "sequential."

As for "bi-turbo" versus "twin-turbo" I'd like to see some form of proof that bi-turbo is reserved solely for sequential setups, and twin reserved for v-based engines with seperate cylinder banks.

[e30sd]

i'm on what i like to call beer number three...