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      07-05-2008, 11:07 AM   #1
mdynamics
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BMW making Variable Turbine Geometry Turbocharger?

I just saw this picture of the 3.0-litre straight six engine for the newly released 7 series, and I thought I should share this with you guys. Complete details of the new 7 series are still not out yet but according to this picture the new 7 series will have a Variable Turbine Geometry Turbocharger similar to the one found in the 911 Turbo and it is apparently used on BMWs famous 3.0-litre straight six engine. So this might the replacement for the twin turbos used for the N54. A single turbo will reduce weight and deliver an even smoother power delivery along the rpm spectrum, as we have all seen in the 911 turbo with VTG.

My observations are based on this picture posted on bimmerpost.com, and if these pictures are not real of the 7 series then Iím sorry and disregard my observation.

http://www.7post.com/forums/showthread.php?t=154335

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      07-05-2008, 11:44 AM   #2
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another angle
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      07-05-2008, 12:07 PM   #3
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Hmm its gonna take some getting use to, but I like it, flows better.
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      07-05-2008, 03:02 PM   #4
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well, the power figures are different, 7 is listed @ 326hp...
Hopefully this is true and 1/3 gets that same turbo.
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      07-05-2008, 04:53 PM   #5
Brandon26pdx
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You guys sure that's not a diesel engine? The picture catalogue in the link showed the car as a 730d...
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      07-05-2008, 05:10 PM   #6
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Quote:
Originally Posted by Brandon26pdx View Post
You guys sure that's not a diesel engine? The picture catalogue in the link showed the car as a 730d...
It could be for the diesel, but even if it was, where you think the twin turbo idea BMW came up with was from, a 5 series diesel. So if it showed up in the diesel engine, it will eventually find its way to gasoline engine.

It does make sense for them to head that way since BMW always advances its engine technology more frequently. And a single VTG (variable turbine geometry) turbo is lighter than the twin turbos, plus less turbo lag and a slightly more hp. I think itís neat for them to develop this.
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      07-05-2008, 05:14 PM   #7
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Based on the shape of the piston domes, I suspect that's a diesel. Brandon nailed it.
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      07-05-2008, 05:23 PM   #8
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actually you are right about that, after looking more carefully at the pics I think the sparkplugs are absent which indicates it is a diesel engine. Still could make its way to the gasoline engine.
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      07-05-2008, 08:21 PM   #9
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So the RPM speed will control the turbo somewhat like the RPM controls the pulley on a supercharger? Except of course the turbo uses exhaust as well.


UT,oh then no way to control BOOST No pulley to change no actuator to open/close

We're screwed!!!
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      07-05-2008, 09:11 PM   #10
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Quote:
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We're screwed!!!

Not really, It will most likely be controled by the ECU which you could mode to control boost. However, they are going to be very efficient to begin with.
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      07-05-2008, 09:56 PM   #11
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Quote:
Originally Posted by mdynamics View Post
Not really, It will most likely be controled by the ECU which you could mode to control boost. However, they are going to be very efficient to begin with.

Ya THINK??? Boost is controled that way now.

Only time will tell, only time will tell...
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      07-05-2008, 11:09 PM   #12
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i saw that turbo set up when i was in school for diesel. it's used in the euro spec n57 diesel motor. us spec diesels will get the twin turbo (in series) design instead of the single large variable vane turbo. the variable vanes are used in lieu of a wastegate to control boost.
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      07-06-2008, 07:34 AM   #13
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thst diesel has less hp (240) than 335d that's coming here.. (275hp).
Anyone care to explain?
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      07-06-2008, 05:31 PM   #14
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what is that massive thing hanging off the turbo? Cat?!
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      07-06-2008, 08:48 PM   #15
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Yeah kinda - the urea injection chamber possibly
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