Porsche Vtg System

[Maxx]

The very concept of turbocharger technology is linked inseparably with the name Porsche and the Porsche brand. It was back in October 1974 that the German sports car manufacturer from Stuttgart launched the world's first series production sports car with an exhaust gas turbocharger. And ever since, every new generation of the Porsche 911 Turbo has fascinated enthusiasts the world over with a special highlight in technology: the intercooler, bi-turbo, VarioCam Plus, as well as the title "Cleanest Car in the World" have all set the benchmark in turbocharger development. Now the highlight of the next generation of the Porsche Turbo is spelt out clearly in three powerful letters: VTG.

Introducing the new model, Porsche will be presenting the world's first turbocharged gasoline engine with variable turbine geometry (VTG). This technology featured in turbocharged diesels since the '90s ensures a significant improvement of engine flexibility and acceleration particularly at low engine speeds. So far, however, much higher exhaust gas temperature of up to 1000° C in comparison with the turbocharged diesel has always proved to be an insurmountable barrier. But now Porsche has solved this problem in close cooperation with Borg Warner Turbo Systems by using high temperature-resistant materials from space technology wherever required.

The core features of the VTG system are the variable turbine blades guiding the flow of exhaust gas from the engine in exactly the direction required on to the turbine wheel of the exhaust gas turbocharger. The principle of variable turbine geometry thus combines the benefits of a small and large exhaust gas turbocharger all in one – a combination ensuring both very good response and high torque at low engine speeds as well as superior output and high performance at high speeds. And the supreme level of torque is now maintained consistently throughout a much wider speed range.

[Roy]

Ok...a question for you turbo gurus. Is that a ball bearing cartridge? To me it looks like a plain bearing water & oil turbo...but i dont really knwo what to be looking for

[Josh]

We are starting to use those at work..

[jnr32r]

looks like a bush type to me??

I still dont understand the concept of the VGT.... how is it that it blades are variable... what actually makes them variable??

[Pablo]

the variable factor is the blade's angle, instead of being fixed they can swivel

[4door_Sleeper]

Sounds like good advertising from BMW.

I agree it looks like a a bush type turbo, and the first turbocharged engine was the AFAIK made by Oldsmobile in the sixties. (there are other examples that didnt make it into mass production that date back even further. (its amazing some of the ideas that were tried out in the early days of automobiles - superchargers, 4wheel drive etc were all tried nearly 100 years ago)

[lwells]

Sounds like good advertising from BMW.

<{POST_SNAPBACK}>

I think you mean Porsche and Borg Warner?

[4door_Sleeper]

I think you mean Porsche and Borg Warner?

<{POST_SNAPBACK}>

Yes - spent too much time searching to checck on the Oldsmobile and mucked up the mames

[Baz]

Where can I buy one of these for my Skyline

[discopotato03]

Its difficult to tell what kind of bearing system that thing uses , I'd like to think if they're throwing good money and technology at it it has balls .

VATN or variable area turbine nozzle was the original name for this concept . It works by the lobes or vanes moving to vary the effective area radius ratio but at the nozzle . The theory is that there is no waste ie no wasted exhaust gas energy being by passed to control the turbine speed . Its supposed to be able to make the ARR so big that total control is possible and turbine inlet pressure minimal at all times . The potential problem of having boost nearly all the time is present so intelligent electronic boost control will be a must .

In the past the hurdle with VATN was reliability of the movable vanes given petrol engine exhaust temperatures . Any garbage in the exhaust gas has the potential to screw it up . I'd say the corrosive nature of out outgoing high sulphur ULP was holding things up a bit as well . Porsche given the market its aimed at (price range) can probably well afford to use this kind of technology to keep performance up into the nothing politically incorrect comes out the pipe future . A pitty our pollies don't fit the same criteria at either end ....

Cheers A .