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Garrett G Series G25-550 Reverse Rotation Turbo

SKU G25-550-RR

Garrett G Series G25-550 Reverse Rotation Turbo

This product is in stock and ready to ship!
In stock
SKU
G25-550-RR
$2,345.72

Garrett G Series G25-550 Reverse Rotation Turbo

Garrett G Series G25-550 Reverse Rotation Turbo Packs a Big Punch for its Size

Garrett’s G25-550 is the smallest Reverse Rotation turbo in the potent G-Series lineup, but it delivers more power than competitors. A clean-slate ball bearing turbo with state-of-the-art aerodynamics, this turbo is more compact yet outflows all comparable products on the market.

The new compressor and turbine aero combined with exotic high-temperature alloys allowed engineers to outdo the Gen2 GTX and competitor turbos. Carrying nothing over from the old gen – the G-series 60mm exducer billet compressor wheel redefines what we thought was possible for a given airflow range. This turbo manages to flow +10 lbs/min (+22% gain) compared to the outgoing GTX2860R Gen II turbo it supersedes.

Garrett G Series G25-550 Reverse Rotation Turbo installed

The reverse rotation G25-550 is an exact mirror of the standard rotation G25. Designed to improve fitment in single and twin-turbo installs, the max turbo speed is 185krpm and the max temp is 1050C/1922F. G25 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. This turbo is 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. It is sold as a complete assembly with supercore and turbine housing.

Garrett G Series G25-550 Reverse Rotation Turbo parts

Compressor Specifications

  • Compressor Wheel Exducer: 60mm
  • Compressor Wheel Inducer: 48mm
  • Compressor Wheel Trim: 65
  • Compressor Wheel Material: Forged Billet Aluminum Alloy
  • Compressor Wheel A/R: 0.70 A/R
  • Max Flow Rate: 50 lb/min
  • Max Recommended Turbo Shaft Speed: 185000 RPM
  • Compressor Housing Connections:
    • Inlet: 3.0″ Hose Coupler
    • Outlet: 2.0″ Hose Coupler

G25-550 60mm Compressor Map

Garret G Series G25-550 Reverse Rotation Turbo

Turbine Specifications

  • Turbine Wheel Exducer: 49mm
  • Turbine Wheel Inducer: 54mm
  • Turbine Wheel Trim: 84
  • Turbine Wheel Material: Mar-M
  • Turbine Wheel Max Temp: 1050C / 1922F
  • Housing Size and A/R ratio: G-Series G25-550 is available in five (5) different turbine housing configurations:
    • 0.49 A/R T25 Single Scroll Inlet, V-Band Outlet w/ Internal Wastegate
    • 0.72 A/R V-Band Single Scroll Inlet, V-Band Outlet
    • 0.92 A/R V-Band Single Scroll Inlet, V-Band Outlet
    • 0.72 A/R V-Band Single Scroll Inlet, V-Band Outlet w/ Internal Wastegate
    • 0.92 A/R V-Band Single Scroll Inlet, V-Band Outlet w/ Internal Wastegate

Turbine Flow Map

Garrett G Series G25-550 Reverse Rotation Turbo Turbine flow map

G25-550 Dyno Results

When installed by Tunnel Vision Turbocharging in Melbourne, Australia, on a Nissan SR20DET, the Garrett G25-550 turbo turned out the following numbers on the dyno.

Garrett G Series G25-550 Reverse Rotation Turbo Dyno results

Understanding the Name

A new name designates a new generation of industry-leading technology and innovation. In G25-550, the “G” designates 81 years of Garrett® Turbo heritage, the “25″ classifies the frame size, and the remaining 3 digits identify the “max horsepower” rating at the flywheel of the turbocharger (550).

G-Series Billet Compressor Wheel

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 when compared to GTX Gen II.

Garrett G25-550 Reverse Rotation Turbo Exploded view

Dual Ball Bearing CHRA – Standard and Reverse Rotation

All G-series turbos utilize a v-band turbine housing to CHRA connection. This improves the ease of installation, clocking, and servicing of the turbo. Each turbocharger includes (1) -4AN oil restrictor fitting with a 1mm restriction orifice to provide the turbo with the recommended 40psi of oil pressure. Four large water jacket ports increase cooling capacity and allow enthusiasts to customize water line routing to help improve the installation process. The turbocharger comes with two -6AN water fittings and two plugs.

Note, we recommended installing waterlines on opposite sides of the housing.

Garrett G25-550 reverse rotation turbo CHRA

G-Series Turbine Wheel and Housing

The G-series turbine wheels feature all-new aerodynamics to improve flow and boost response. The industry-leading design is now made of lightweight Mar-M superalloy 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%.

Garrett G series G25-550 reverse rotation turbo turbine wheel

Turbo Speed Sensor

We recommend adding a turbo speed sensor. 

turbo speed sensor

G-Series Diagram

Garrett G Series G25-550 Reverse Rotation Turbo Diagram

About Garrett® G-Series Series Turbochargers

Garrett® G-Series turbochargers are designed specifically for hard-core enthusiasts who want optimal performance. The forged fully-machined billet aluminum compressor wheels feature next-generation aerodynamics that provides a larger horsepower range and maximize boost response.

Ported shroud compressor housings increase surge resistance and provide reliable, continuous power throughout the power band. A dual ceramic ball bearing cartridge prolongs the lifespan and improves shaft balance. The watercooled CHRA keeps housing temperatures to a minimum. The turbine wheel is constructed from Mar-M, a Super Alloy that maintains strength during prolonged exposure to high exhaust gas temperatures.

If you have questions about this product or its installation, contact us

SKU

G25-550-RR

WEIGHT

30.000000

BRAND

Garrett

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