Variable Turbine? Holy crap have u seen this?
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From: salt lake city
Variable Turbine? Holy crap have u seen this?
Here is some info I came across about this new turbo that will be in the upcoming Porsche 911 turbo... just wondering what people opinions are on it and how well it would work in the EVO:
....Porsche will debut its new Variable Turbine Geometry turbo on the next 911 Turbo. It features turbine blades in the compressor that can adjust their angle and affect airflow. The result should be a single turbo that acts like a twin turbo. More interesting is the technology behind the Turbo's newfound power: Variable Turbine Geometry (VTG), which has been used on diesels since the early 1990s, but rarely before on a production gasoline engine. Porsche says, "The heart of the technology is adjustable guide blades, which can vary in angle to most effectively guide engine exhaust flow onto the turbocharger's impeller wheel." Porsche developed its version of VTG with BorgWarner Turbo Systems, overcoming the far higher exhaust-gas temperatures of a gasoline engine with "temperature-resistant materials derived from aerospace technology."
The result provides the advantages of both a small and a large turbo, especially improving response at low engine speeds. This is shown by a rise in torque from 415 lb.-ft. to 457, as well as in the spread of the peak torque: previously from 2700-4600 rpm, now from 1950-5000. And if that's not enough, the optional Sport Chrono Package allows a 10-second "overboost," increasing turbo boost under full throttle to bring peak torque to 502 lb.-ft....
....Porsche will debut its new Variable Turbine Geometry turbo on the next 911 Turbo. It features turbine blades in the compressor that can adjust their angle and affect airflow. The result should be a single turbo that acts like a twin turbo. More interesting is the technology behind the Turbo's newfound power: Variable Turbine Geometry (VTG), which has been used on diesels since the early 1990s, but rarely before on a production gasoline engine. Porsche says, "The heart of the technology is adjustable guide blades, which can vary in angle to most effectively guide engine exhaust flow onto the turbocharger's impeller wheel." Porsche developed its version of VTG with BorgWarner Turbo Systems, overcoming the far higher exhaust-gas temperatures of a gasoline engine with "temperature-resistant materials derived from aerospace technology."
The result provides the advantages of both a small and a large turbo, especially improving response at low engine speeds. This is shown by a rise in torque from 415 lb.-ft. to 457, as well as in the spread of the peak torque: previously from 2700-4600 rpm, now from 1950-5000. And if that's not enough, the optional Sport Chrono Package allows a 10-second "overboost," increasing turbo boost under full throttle to bring peak torque to 502 lb.-ft....
Last edited by DJ Brett B; May 16, 2006 at 03:29 PM.
Once that technology is picked up and implemented by aftermarket turbo manufacturers the whole game is going to change. Could you imading a GT42 that makes full boost under 4000 RPMs and can carry it out to 9000?
Or a 16G that makes full boost at 1500 RPMs?? The posibilities are endless
EVOlutionary
Or a 16G that makes full boost at 1500 RPMs?? The posibilities are endless
EVOlutionary
Originally Posted by EVOlutionary
Once that technology is picked up and implemented by aftermarket turbo manufacturers the whole game is going to change. Could you imading a GT42 that makes full boost under 4000 RPMs and can carry it out to 9000?
Or a 16G that makes full boost at 1500 RPMs?? The posibilities are endless
EVOlutionary
Or a 16G that makes full boost at 1500 RPMs?? The posibilities are endless
EVOlutionary
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Originally Posted by sasquatch
This article came out months ago, and variable geometry turbos have been used on deisel engines for years. Kinda old news....
this has already been discussed off topic in a few threads.
the turbo actually isn't vnt it's vgt. the turbine inducer blades have variable angles
http://www.m5board.com/articles/geneva2006/DSC05251.jpg
the turbo actually isn't vnt it's vgt. the turbine inducer blades have variable angles
http://www.m5board.com/articles/geneva2006/DSC05251.jpg
the new Acura RDX will also come with a variable flow turbo (VFT).
this technology has been use in deisel engines for a long time. it wasn't widely use in gas engines because exhaust gas temp is much higher in gas engines and prove to be unreliable.
this technology has been use in deisel engines for a long time. it wasn't widely use in gas engines because exhaust gas temp is much higher in gas engines and prove to be unreliable.