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New BMW Engine, 3.0 I6 TwinPower Turbo (N55)

This is a discussion on New BMW Engine, 3.0 I6 TwinPower Turbo (N55) within the The BMW Lounge forums, part of the BMW category; Originally Posted by Giannis I have two questions: 1. Will this engine (N55) replace the twin-turbo N54 in all models? ...
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Old 05-27-2009, 03:54 AM   #11
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Originally Posted by Giannis View Post
I have two questions:

1. Will this engine (N55) replace the twin-turbo N54 in all models?

2. Why in all those photos isn't the engine (cylinders) vertical?
The engine is slightly tilted from the center line to lower its center of gravity relative to the car.
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Old 05-27-2009, 03:58 AM   #12
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Thanks Monster!

But that tilt (which is a big one as it seems) doesn't affect the whole car's balance?
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Old 05-27-2009, 04:08 AM   #13
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Thanks Monster!

But that tilt (which is a big one as it seems) doesn't affect the whole car's balance?
It will, but I am sure the engineers have managed to minimise such effects. The weight distribution of most cars isn’t perfectly symmetrical anyway. For example transverse front engine cars like the EVO have a slightly uneven weight distribution between the left and right side. Both E46 and E36 as well as the M version, and previous generations of BMW (I am no BMW expert, can't name them all) all have their inline engine tilted from the center line.
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Old 05-27-2009, 04:28 AM   #14
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Wen BMW started turbo charging the fan boys took alot of flak from the rest of the brigade cos we would rub it in their faces that they had to turbo charge just to achiev same power outputs from BMW NA engines.

Dont get me wrong the competition have some amazing engines and BMW do not make the best engines in the world (however that is debateable) but this new range of turbo charging is just amazing and makes you wonder how the competition will respond.
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Old 05-27-2009, 04:37 AM   #15
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Wow a broader powerband, america here it comes, beware!
If the Americans love their torque that much it is a mystery that diesel engines does not dominate the market.
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Old 05-27-2009, 04:37 AM   #16
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Take special note that the picture used in the dubious Motor Authority article (and on their own webpage) posted by CarGuy depicts the twin-turbo N54 and not the N55. I'm amazed that no-one picked that up. It seems that Motor Authority are no authority whatsover these days...

Furthermore the article is incorrect when it states that the N54 features valvetronic. It does not. The primary uniqueness of this engine lies in the first ever combination of a twin-scroll turbocharger + DI + Valvetronic and on a straight six to boot. A landmark engine - watch this space.

This is the best detailed picture of the location and ducting for the N55's twin-scroll turbo:

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Old 05-27-2009, 04:42 AM   #17
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Take special note that the picture used in the dubious Motor Authority article posted by CarGuy depicts the twin-turbo N54 and not the N55. I'm amazed that no-one picked that up.
I saw the link, and the photo and knew the article is rubbish and doesn't worth my effort to mention it.
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Old 05-27-2009, 04:52 AM   #18
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amazing. full stop.
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Old 05-27-2009, 04:57 AM   #19
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EnI, is the turbocharger unit the same as that fitted to the X5/6M?
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Old 05-27-2009, 05:37 AM   #20
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Martin will you explain us the difference between a twin turbo and a twin scroll turbocharger?
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