Flow Data
Garrett engineers created GVW as a high flowing product with low degradation in performance over its lifespan. Here’s how the three GVW wastegate sizes flow in LBS/MIN and KG/SEC at various increments of the valve stroke.
Material Data
The valve housing is cast from high temp stainless steel and rated for exhaust temperatures up to 1050° C. CFD optimized for maximum flow and thermal efficiency.
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Valve Housing: High temp stainless steel rated up to 1050° C
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Diaphragm: High temp Nomex reinforced elastomer
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Actuator Cover: Fully-machined anodized 6061 aluminum
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Valve Guide | Bushing: Nitronic 60
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Valve: high temp stainless steel with plated stem
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V-Band: CNC machined 304 stainless steel
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Flanges: Fully-machined 304 stainless steel
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Springs: 17/7 PH stainless steel
Mechanical Data
Garrett Vent | External Wastegates are created by the engineers that designed G-Series and GTX Gen II turbochargers. Available in three sizes: 40mm
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Valve Diameter: 40mm
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Valve Mass: (40mm)1.27kg
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Max Spring Base Pressure: 1.7 bar | 25 psi (1:1 backpressure ratio)
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Minimum Spring Base Pressure: 0.2 bar | 3 psi (1:1 backpressure ratio)
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Port Fitting | Air: M10x1.0 to hose barb (hose ID 6mm | .25in)
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Port Fitting | Water: M8x1.0 to AN-3
Thermal Data
When researching and testing common shortfalls of wastegates, we observed how heat cycling and normal wear can rapidly change their actuation characteristics. Garrett engineers created GVW as a high flowing product with low degradation in performance over its lifespan. Actuation data (opening and closing) in the chart was measured before and after extreme testing conditions. Results show the heat cycled GVW product maintains linear control of the wastegate as compared to the new product. Precise actuation of the GVW provides accurate calibration settings and performance throughout the lifespan of the product. Accurate wastegates, allow for optimum performance of the turbocharger.
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Max Thermal Stress (non-cooled): 270°C actuator body temp during thermal cycle test
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Max Thermal Stress (liquid-cooled): 130°C actuator body temp during thermal cycle test
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Max Exhaust Temp | Peak: Up to 1050°C
Kit Contents
GVW Wastegates include all the following parts:
- Springs
- V-Band: Inlet | Outlet
- Outlet Flange
- Inlet Flange
- Valve Seat
- Washers: M8 | M10
- Water Fittings
- Banjo Bolt and Banjo Fittings
- Air Plugs
Wastegate Springs
GVW wastegates are set to 1 Bar | 14.5 PSI of base pressure and can be configured from 0.2 Bar | 2.9 PSI – 1.7 Bar | 24.7 PSI (considering 1:1 backpressure).
Use the chart to reference wastegate size and spring color to identify Garrett GVW wastegate spring pressures
Wastegate Flange Specs
GVW Wastegate flanges can be references in this data:
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GVW-40: Inlet OD 55.4mm | 2.18in Outlet OD 48.9mm | 1.93in (Interchangeable with Tial MV-S, MV-R)
Wastegate Port Fittings
GVW wastegates feature a water-cooling circuit which allows the product to be operated in extremely high temperature conditions while maintaining its actuation characteristics. Water-cooling symbols are etched near both of the fitting ports for easy identification. If watercooling, both ports must be used to create a coolant loop. (2) Water fittings and (2) washers are included and can be installed with a 14mm wrench or socket.
There are two air ports on the top cap and three air ports on the valve body. (2) 14mm Banjo fittings with washers and (3) 5mm hex head air plugs are included. Please see the boost control section for more information on how to install the port fittings based on your application.
