German Car Forum

Sorry I am a bit confused, which part of the engine are you referring to.

Btw, direct injection SI engines have better thermo efficiency and that means the combustion can occur at higher temperatures, which means the exhaust gas will be even hotter than usual. Notice the exhaust manifolds are thick looking cast alloy (not sure which type) items which seems to me can insulate the heat from the exhaust gas.

Perhaps air vents on a hood would help a lot at heat removal from the engine bay. I'm surprised the cars in the official photos doesn't have the vents (neither does the concept) - since the prototypes are featuring them.







Still the ducts are made of aluminum - so, having very good thermal conductivity. No special insulation there.

I guess the airflow through engine bay (and especially between the engine cover & hood) is designed to cool the area sufficiently.

now i´m completly confused
on occasion I must throw a glance of it

Im confused too, but guys in BMW knows what they do

I wonder what is the temperature surrounding the turbos and the exhaust manifold. Is BMW going to have an official technical press release for this new engine?

Does anyone know when X5 will get this engine? Fall 2008/2009 MY?

Can someone direct me to official press release information for this engine, including the detailed technical pics.

I'm very interested in this talk of mounting the catalytic convertors in the V of the engine - has anyone got a pic of their actual location? Also want to find more about those intercoolers mounted at the front of the engine... I gather they are charge air coolers.

And yes, Eni, (you bastid ) now I know exactly why those spy pics of the F01 7er engine bay had me so perplexed! Quite simply, we've never seen the likes of such an engine before.

BMW does it, yet again. I'm very impressed.

evolutionary masterpiece

Now,thats what I call engineering ..just stunning..

Another International engine of the year prize for BMW.

2005: S85
2006: N54
2007: S65
2008: N64

Nobody does it better than them... Nobody!

Yup, can't think of another manufacturer with better engines across the entire range.

Cant wait to see this baby in action! btw, what are the power figures on this engine?

407hp/600nm

I just cant wait what will Hartge or AC Schnitzer do with this engine ..Already this engine putts rivals to its knees and,if I´m not wrong,this is just stage 1 configuration (power and torque figures).IMO,M5 and other performance bemmers will be endangered more than ever ..

Yeah when I think about it, this is true. After all doesn't the "M" in "BMW" stand for for "Motor" loosely translated.

M

I think it stand for Motorsport

Andreas,don think it stands for Motorsport..know it!!!

Shame on your so-called BMW "fans"!!!!

BMW = Bayerische Motoren Werke

M

M = motorsport
BMW = Bayerische Motoren Werke


Two different things Marcus.

EDIT: Sorry Marcus I misunderstood you, thought you meant letter M in M3/M5, I didnt read correct. Now I see, you meant M in BMW.

Detroit 2008: BMW's twin-turbo 4.4L V8



BMW's twin-turbo 3.0L inline-six has been a rousing success, with nothing less than a Wards 10 Best Engines award sitting in its trophy case. The praise is understandable and well-deserved, as the engine uses a combination of forced induction and direct injection to serve up a torque curve that's far beefier and flatter than what should be expected from a engine of its size. So what next for the propeller brand? Simple -- take similar technology, add it to the company's 4.4L V8 and toss in a dash of unconventional packaging to make everything fit.

BMW put its latest jewel on display at the 2008 Detroit Auto Show, and we snapped some shots of it to give you an idea of why this engine is so special. We've included those photos in one of our galleries, and below the fold, we've thrown in a few observations.

Gallery: Detroit 2008: BMW 4.4L V8 twin-turbo






Undoubtedly, the most unique feature of the 4.4L TT is the packaging of the turbochargers in the valley between the cylinder banks.



This is made possible by the swapping of the intake and exhaust ports in the cylinder heads, with the exhaust now exiting towards the middle. This allows the turbochargers to be mounted in the valley with minimal plumbing, which means less bulk, lower weight and better efficiency.



Immediately after exiting the turbochargers, the exhaust gases enter the catalysts. It's important to keep the cats as close as possible, as the exhaust carries heat that is required for the converters' operation.

Packaging the cats in this location underneath the hood must present some interesting insulation challenges!



Instead of expensive variable-vane technology, each turbo makes use of fixed geometry and relatively simple wastegates.



Each compressor is fed via a black oval-shaped duct, as shown above.



Between the compressor outlet and the intake manifolds lie a pair of air-to-water intercoolers, one for each bank. Such an intercooler reduces packaging volume and tract length compared to a top- or front-mounted air-to-air heat exchanger.

Immediately downstream of the intercoolers lie a pair of electronically-controlled throttle bodies.



Below each centrally-located coil-on-plug (COP) assembly resides the direct injector, along with the feed lines and fuel rail. It's presumed that piezoelectric injectors are employed here, which are fast enough to allow several injection events per combustion cycle.



Each fuel rail gets its own fuel-pressure regulator. The operating system of this system is yet unknown, but we're guessing that it's similar to the 200 bar (3000 PSI) that is used in the engine's direct-injection predecessors.



Dished pistons are used to lower the compression ratio, with a compact ring package to reduce crevice volume and frictional losses.



The net effect is a peak of 400 HP, with 450 lb-ft of torque delivered between 1750 and 4500 RPM. In a sport sedan such as the 5 Series, this engine will likely erase fond memories of the musclecar era, and even in portly SUVs such as BMW's X5 and X6, the result should still be rather impressive.


Source: Detroit 2008: BMW's twin-turbo 4.4L V8 - Autoblog

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My friend Martin will love this...

This new V8 TT is nothing less than perfect..period

I somehow have this feeling it will get just as much praise as the 3.0 TT engine, if not more....

Does anyone know the weight of the motor? It's dimensions (LxWxH)?