Garrett G-Series G47-1650 80mm (120mm Exducer) Turbocharger

The G-Series G47-1650 80mm (120mm Exducer) pairs Garrett's GTX Gen II compressor aerodynamics with a G-Series turbine wheel in a one-piece lightweight aluminum center housing and backplate. It is outline-interchangeable with GTX Gen II turbos of the same frame, and the stainless steel T6 inlet turbine housings are sold as the variants below.

Garrett rates the G-Series G47-1650 80mm (120mm Exducer) for 825 to 1,650 horsepower on 2.5 to 10.0 liter engines.

Key Specifications

• Series — G-Series
• Frame size — 47 frame
• Horsepower rating — 825–1,650 hp (Garrett rating)
• Engine displacement — 2.5–10.0 L
• Compressor wheel — 80 mm inducer, 120 mm exducer, 45 trim, 0.88 A/R housing
• Turbine wheel — 93 mm inducer, 88 mm exducer, 90 trim
• Maximum turbo speed — 93,000 rpm
• Supercore part number — 880547-5025S

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.

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 93,000 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.