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GTX4709R GEN II Turbocharger 76MM

Horsepower: 825 - 1575

Displacement: 2.0L - 10.0L

Features

  • GEN II COMPRESSOR WHEEL AERODYNAMICS
  • 76mm compressor inducer | 109mm compressor exducer
  • 93mm turbine inducer | 84mm turbine exducer
  • 15% INCREASED FLOW
  • LARGER .88 A/R COMPRESSOR HOUSING VOLUTE
  • GTX4709R FEATURES A 109mm COMP EXDUCER ( + 1mm) AND HAS 39% LOWER INERTIA COMPARED TO GTX4708R
  • SUPERCORE AND TURBINE HOUSING SOLD SEPARATELY
  • COMPATIBLE WITH GT AND GTX TURBINE HOUSINGS
  • 76MM SUPERCORE PART NUMBER: 851285-5011S

WARNING: Maximum allowable turbocharger speed is 102.5krpm. The use of this product above max turbocharger speed is at the owner’s risk, and can result in damage and premature failure. To protect the turbocharger from overspeed when operating, a speed sensor can be installed into the compressor housing to monitor shaft speed. Sensors sold separately. (click here for details)

Performance results of this product are highly dependent upon your vehicle’s modifications and tuning/calibration. The horsepower numbers represented above are calculated based strictly on choke flow of the compressor map (total turbo capability), which represents the potential flywheel horsepower.

Learn More About Race Vehicle Setups

GTX4709R GEN II 76mm

Reference Data

The latest Garrett technologies featuring many advanced features.


GTX4709R GEN II Compressor Turbine
HP: 825-1625              Disp: 2.0L-10.0L Inducer Exducer Trim A/R Inducer Exducer Trim
Supercore PN
851285-5011S 76mm 109mm 49 0.88 93mm 84mm 82
851285-5012S 80mm 109mm 54 0.88 93mm 84mm 82
Turbine Kits: GTX47 PN A/R Inlet Outlet Wastegate Divided
Interchangeable with GT|GTX 4708 4709
4718 4720 Supercores
761208-0009 0.96 T6 V-Band Free Float N
761208-0010 1.08 T6 V-Band Free Float N
761208-0011 1.23 T6 V-Band Free Float N
761208-0012 1.39 T6 V-Band Free Float N

GTX4709R GEN II 76mm

Download Section

The latest Garrett technologies featuring many advanced features.

File Name Link View
Configuration Guide Download View
File Name Link View
Compressor Map Download View
Exhaust Flow Chart Download View
Product Photo Download View
Flange Diagram Download View
Speed Sensor Kit Installation Instruction Download View

GTX4709R GEN II 76mm

Compressor Map & Exhaust Flow Chart

The latest Garrett technologies featuring many advanced features.

Compressor Map

Exhaust Flow Chart

Gen II Compressor Wheel Dimensions and Aerodynamics

GTX4709R Available in 76mm and 80mm inducer diameters

  • Comp exducer is now 109mm (+1mm vs Gen I)
  • Gen II wheel produces 15% more air flow
  • 39% lower inertia

Larger Comp Exducer on Gen II

.88 A/R Compressor Housing

Gen II features a larger .88 A/R (Gen I .69 A/R)

  • This helps maximize the power capacity of the new compressor wheel.
  • This is also the same compressor housing used on the GTX5533R (85mm and 88mm)

Larger Compressor Volute

.88 A/R Compressor Housing

Gen II features a larger .88 A/R compressor housing that will cause an increase in outline dimensions only on the cold side of the turbo.

  • +6mm longer on the comp outlet Fig. A
  • +10mm longer on the comp inlet Fig. B
  • Comp outlet diameter 107mm (same)
  • Not outline interchangeable with gen 1

Dimensional Compressor Measurements vs. Gen I

Additional Features

  • Lightweight billet backplate
  • (NEW) Backplate to compressor housing O-ring
  • Speed sensor port compatible only with new flange style speed sensors: (pn 781328-0003 Street Kit | pn 781328-0004 Pro)

Compatible only with New G Series Speed Sensor