PRI 2016: Garrett Gen II GTX And Reverse Rotation Turbochargers

Garrett is world renowned in both the industrial diesel market and performance aftermarket for their high tech and reliable turbochargers.

While walking the halls of the Indiana Convention Center for PRI 2016, we had the opportunity to talk to Garrett’s application engineer, Harut Stepanyan, to learn a little more about the company’s new line of second generation GTX turbochargers and reverse rotation units.

“The major difference between the second generation and the first generation GTX turbocharger series is the vastly improved compressor wheel aerodynamics, producing as much as a 10 percent increase in horsepower output at the same compressor speed,” says Stepanyan. “Our first generation turbochargers generally used an 11 blade compressor wheel, but our new more aerodynamic second gen units feature eight, nine or ten blade wheels which are optimized to the size of the turbo housing.”

Left: The compressor map for the second generation GTX3076R turbocharger. Right: The compressor map for the first generation GTX3076R turbocharger.

“Our second generation compressor housings also feature a machined inlet and outlet for improved aesthetics and are pre-drilled for a turbocharger speed sensor, eliminating the need to have the turbocharger housing modified later.”

Notice the ported inlet housing and plug for the speed sensor port on the left.

“Our reverse rotation turbochargers are available in both the 30 and 35 series, meaning the GTX3071R, GTX3076R, GTX3576R, and GTX3582R. They are identical to their standard rotation siblings and are intended for those who prefer the mirror image effect for twin turbo setups or the dimensions fit their engine bay better,” concludes Stepanyan.

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About the author

Kyle Kitchen

Born and raised in Southern California, Kyle has been a gearhead ever since seeing his first Mitsubishi Evo VIII in 2003. He is almost entirely self taught mechanically, and as an inexperienced enthusiast always worked on his own vehicles, regardless of the difficulty, just to learn how to do it himself. Prior to becoming a freelance writer for the company, Kyle started his automotive performance career with Power Automedia as a shop technician, where he gleaned intimate knowledge of LS platforms and drag racing builds; then later joining the editorial team as the Staff Writer for EngineLabs And Turnology. Today, Kyle is an experienced EFI calibrator; hot rod builder; and motorsports technician living in the San Jose area. Kyle is a track junkie with lots of seat time. You can usually find him racing his Mitsubishi Evo X in local time attack and road race events.
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