This may belong in another thread; but until it is moved thought you hard core FI fanatics would enjoy this quick blurb.

"This increase in power can be attributed to the newly designed turbocharger that feature Variable Turbine Geometry (VTG). The VTG technology adjusts the angle of each turbine blade within the charger so it remains at top efficiency no matter what the speed, which basically combines the attributes of a large and small turbocharger into one. This was not possible previously because of the high levels of heat generated by exhaust gasses; however, Porsche has developed a special material resistant temperatures reaching 1000°C (1830°F)." ( http://autos.msn.com/advice/article....tentid=4024058 )

"With boost always on tap (no turbo lag), exhaust gas temperature (EGT) remains high which delivers more energy..." Another good read on the technology ( http://www.motortrend.com/roadtests/...bocharger.html )

 

well, you're not paying $120K+ for nothing!

 

Varible Area Turbo Nozzle tech is not that new. GM had one before. Acura's RDX features one also.

In regards to our application. For a stock compression NA engine, I'm not sure the extra expense would be worth it. We have high compression that helps with low end power. For built motors featuring lower compression by all means, it would be great.

 

Not saying the technology is new per say, but the application for standard pump gas is new; diesel engines have been using this technology for a long time, but the application to gasoline engines is very new due to the temperate dealt with in this environment.

Not that I am an expert nor did I lookup the above suggestion that this is on an RSX Turbo or some other application, but let me leave you with this quote, "for the first time with a gasoline engine (known with turbo diesel engines since last decade)" (http://www.motiontrends.com/2006/m03...11_turbo.shtml)

This is suggesting that this is the first application of the technology ever applied to gasoline vehicles so that either means I misunderstood the article or statement or the RSX or another vehicle that is gasoline power never used this technology before.

 

Aerodyne had a VATN turbo a few years ago. Gas application

 

Looks interesting.

M

 

The VTG has been used on some diesel engines since the late 80's however is only very recent on gasoline engines as higher spec materials are required for the higher exhaust gas temps associated with gas engines. APS as been testing VTG turbos since 1992, right now the cost of a gas spec VTG turbos is simply too expensive for the aftermarket, this may change in the coming years, let's hope so.

James

 

That would be nice but how many people would pay 2X as much for a kit with no lag when they can get a JWT TT kit with almst no lag for less than that.

 

We just had a 997TT in our shop for a header and exhaust upgrade we are developing. I had a little peak at the turbos.Very trick and very expensive.Hopefully the technology will be readily available to the aftermarket in a couple of years.I know the previous gen VATN turbos worked well but longetivity was an issue.Hopefully Porsche and KKK got it right this time around.


Tim