M5 Diesel!!

[Hellas]

yes but why did they not go vvt turbo on the diesel?

i find it interesting that they have dropped the variable vane turbos... it must not work well enough...

Where have they dropped them? They are still well in use with the single turbo diesel engines. The thing is, it is not necessary with sequential turbo setups, and it ads a lot of unnecessary complexity. Both in terms of things that will need maintenance at >100kkm and in terms of the control system.

The two turbos cater for low and high revs. Then comes the tuning and maintenance aspect of a vvt. But after all is said, two is much better than one.

 

[Scouse]

imp:
If you take this thing on it will leave you in a cloud of smoke... from all the diesel fumes! :mmm:

No more diesel smoke or fumes from these diesels :rollsmile:

 

[zaleonardz]

and now we are prob going to get fscked over and not see it in SA. like the 745 or 545d....

 

[moranor@axis]

vvt was supposed to be the new Jesus when it come to making high boost with minimal lag... now they go back to the old method of sequential turbos...

i dont get it this is the flagship model so it should be pushing the technology they want to filter to the lower ones...

 

[P1000]

vvt was supposed to be the new Jesus when it come to making high boost with minimal lag... now they go back to the old method of sequential turbos...

i dont get it this is the flagship model so it should be pushing the technology they want to filter to the lower ones...

No. You are not following. VVT makes your rpm range under boost bigger and also lowers lag a bit, which means that you can use a bigger turbo without all the downsides. Sequential turbo does the same, only on a much larger scale. There is no need to combine the two, as you will already not be able to perceive any lag on this car.

 

[moranor@axis]

i was not saying they should combine the vvt with sequential...

vvt seems like a rather useless technology then sequential turbos setups have been around for ages the only reason not to do sequential turbos is cost or lack of space...

from what i understand a vvt setup will cost about the same as sequential... so cost is not really a factor...

 

[P1000]

VVT costs less than sequential less than half, in fact. Not at all useless tech.

 

[M3_FTW]

They are not calling it the M5 (diesel) They are probably going to call it 550M, M550 or something along those lines.

 

[Nic_s]

They are not calling it the M5 (diesel) They are probably going to call it 550M, M550 or something along those lines.

550dM, from article.

 

[moranor@axis]

VVT costs less than sequential less than half, in fact. Not at all useless tech.

now im seeing the full picture
VVT still seems a rather finicky way to go about things with little gain...

5 turbo sequential FTW :rollsmile:

 

[P1000]

No, you get a lot of gain from VVT. Some of the stock turbos boost 1.8 bar above atmospheric on VVT, and from 1800rpm to 4000+rpm. If it wasn't for VVT, you would have to wait for 3500rpm to reach that boost with the same terminal rpm.

 

[moranor@axis]

that is impressive... so then why not use vvt on the diesel M5...

 

[P1000]

that is impressive... so then why not use vvt on the diesel M5...

Because they are probably boosting 2.5 bar+

 

[moranor@axis]

so then is it imposable for a vvt to boost that high now?

 

[v1p3r]

One of the turbo's is supposed to be an electric one, and it won't be an ///M5 diesel, just a M tuned diesel. The same engine is supposed to go into the 6 series, X5 and X6. It was rumoured to be called the 555d at some stage.

 

[Hellas]

Electric? Like the garden blower trick? :mmm:

 

[v1p3r]

I don't know exactly how it works hey, but there were articles on bimmerpost and bmwblog about this car, and electric turbos

 

[Sankekur]

Hopefully is comes with a proper sound system, to play some nice V8 sounds with

 

[Philip Foglar]

Hmm, a diesel M car! That should be a lot of fun! And can you imagine the petrol vs diesels debates then!?! :rollsmile:

Jokes aside, this will be very interesting to see if it ever comes here! :inlove:

 

[MikeR]

raise:raise:raise: thats what I was talking about, thats what I want in my ZED....no one is listening.