Garrett GTX4709R Gen II 80mm Turbocharger

The GTX4709R Gen II 80mm is a Garrett GTX Gen II large-frame turbo with Gen II compressor wheel aerodynamics and a 0.88 A/R (area-to-radius ratio) compressor housing volute. The supercore and turbine housing are sold separately, and the supercore accepts Garrett GT and GTX T6 turbine housings of the same frame.

Garrett rates the GTX4709R Gen II 80mm for 825 to 1,625 horsepower on 2.0 to 10.0 liter engines.

Key Specifications

• Series — GTX Gen II
• Frame size — 47 frame
• Horsepower rating — 825–1,625 hp (Garrett rating)
• Engine displacement — 2.0–10.0 L
• Compressor wheel — 80 mm inducer, 109 mm exducer, 54 trim, 0.88 A/R housing
• Turbine wheel — 93 mm inducer, 84 mm exducer, 82 trim
• Maximum turbo speed — 102,500 rpm
• Supercore part number — 851285-5012S

Turbine Housing Options

Each turbine housing is listed by A/R (area-to-radius ratio), inlet flange, outlet and wastegate type. "Internal" housings have a built-in wastegate; "External" housings are free-float designs that require an external wastegate.

Garrett: Interchangeable with GT/GTX 4708 4709 4718 4720 Supercores.

Important Information

Garrett calculates its horsepower ratings from the compressor map choke flow, which represents the potential flywheel horsepower of the turbo. Actual results depend on the engine, supporting modifications and calibration.

Garrett sets the maximum allowable speed for this turbo at 102,500 rpm. Operating above that speed can damage the turbo and cause premature failure. A turbo speed sensor (sold separately) lets you monitor shaft speed.

For race vehicles only. Not for use on public roads.

Installation and Tuning Available at Race Protocol

Turbo system design, installation and dyno tuning are available in house. Call (724) 732-8948 to discuss your build.