Garrett G Series G30-770 Turbo

The Garrett G Series G30-770 Is a Superbly Powerful Small Frame Turbo

Garrett’s G30-770 is the most impressive turbo in the G30 lineup. It is the sweet spot in terms of power and how fast that power comes on and is the most relevant, true 600-650hp turbo out there right now. Before you jump straight to the G30-900 because it's bigger, you have to check this one out. The G30-770 is Garrett's clean-slate ball-bearing racing turbo with state-of-the-art G series aerodynamics. This turbo is compact yet outflows all comparable products on the market, and it is available in twin scroll 1.06 a/r!

Carrying nothing over from the old gen GT turbos and the GTX turbos, the Garrett G-series 71mm exducer billet compressor wheel redefines what we thought was possible for a given airflow range, flowing +10 lbs/min (+22% gain) compared to the outgoing GTX3071R Gen II turbo it supersedes. G30-770 Max turbo speed is 150krpm and the max temp is 1050C/1922F.

G30-770 Compressor housings use a traditional 3″ inlet and 2″ hose outlet with a fully machined Speed Sensor Port. The Improved ported shroud inlet design offers maximum surge resistance with huge flow rates in a compact outline. Available in standard rotation and reverse rotation options for enthusiasts that want the perfect twin turbo installation or a single reverse rotation turbo for applications with installation restrictions. Sold as a complete assembly with supercore and turbine housing.

Compressor Specifications

• Compressor Wheel Inducer: 58mm
• Compressor Wheel Exducer: 71mm
• Compressor Wheel Trim: 65
• Compressor Wheel Material: Forged Billet Aluminum Alloy
• Compressor Wheel A/R: 0.72 A/R
• Max Flow Rate: 73 lb/min
• Max Recommended Turbo Shaft Speed: 150000 RPM
• Compressor Housing Connections:
  • Inlet: 3.0″ Hose Coupler
  • Outlet: 2.0″ Hose Coupler

G30-770 71mm Compressor Map

G-Series Turbine Flow 

The G-series turbine wheels feature all-new aerodynamics to improve flow and boost response. The industry-leading design is made of Mar-M super alloy and is capable of handling exhaust gas temperatures up to 1050 degrees C. The new G25 turbine wheel flows 15-20% more than GTX and has a peak efficiency of 74%.

G30-770 Dimensions

Gen2 GTX3076R (Red Line) VS G30-770 Dyno Graph

Below, you’ll see a dyno graph comparing a Gen2 GTX3076R (red line) with a .83 a/r hotside VS G30-770 with a .83 a/r hot side (blue line), same car, same boost pressure. This is on a stock RB25 using pump gas.

Understanding the Name

A new name designates a new generation of industry-leading technology and innovation.

• G30-770:
  • “G” designates 81 years of Garrett® Turbo heritage.
  • “30″ classifies the frame size.
  • The remaining 3 digits identify the “max horsepower” rating at the flywheel of the turbocharger. (ie 770)

Available in standard rotation and reverse rotation options for enthusiasts that want the perfect twin turbo installation or a single reverse rotation turbo for applications with installation restrictions. The CFD (computational fluid dynamics) engineered compressor wheel increases airflow up to 15% for 60mm with 79-80% efficiency. (Compared to GTX GenII)