Garrett's 40mm external wastegate kit GVW-40 allows for venting of exhaust gas around the turbine and precise regulation of turbocharger shaft speed on racing turbochargers. The GVW wastegates (also available as GVW-45 and GVW-50) were a challenge to craft; that expectation of a simple design completely changed after the team spent a whole year perfecting it.
The GVW-40 wastegate has undergone extensive CFD testing for optimal flow, thermal efficiency, and durability. Constructed from high-temp stainless steel, the Garrett GVW-40 valve body is designed to withstand exhaust temperatures of up to 1050°C. It provides consistent performance no matter the temperature, offering a 5% increase in maximum flow over competitors for optimal turbocharger and engine output.
The GVW-40 is shipped at 1 bar (14.5 psi) and, with its included springs, can be configured to output from 0.2 bar (2.9 psi) to 1.7 bar (24.7 psi) base boost. Every single fastener, spring, fitting, V-band, clamp, and flange necessary for installation is included, so setup is effortless. Note: This is especially suited for twin-scroll dual wastegate applications.
TECHNOLOGY & FEATURES
- CFD tested for maximum flow and thermal efficiency
- Superb durability thanks to optimized actuation stability and unrivaled temperature resistance
- Bushing components are fully-replaceable, increasing service life
- Easy Nomex diaphragm replacement
- Anodized aluminum top cap with optional watercooled actuator port
MECHANICAL SPECS
- Valve diameter: 40mm
- Valve mass: 1.27kg | 45 oz
- Maximum spring base pressure: 1.7 bar | 25psi (1:1 backpressure ratio)
- Minimum spring base pressure: .02 bar | 3psi (1:1 backpressure ratio)
- Port fitting, air: M10x1.0 to hose barb (hose ID 6mm | .25in)
- Port fitting, liquid: M8x1.0 to AN-3
MATERIAL SPECS
- Valve housing: high-temp stainless steel rated up to 1050 degrees C
- Diaphragm: high-temp Nomex reinforced elastomer
- Actuator cover: fully-machined anodized 6061 aluminum
- Valve guide/bushing: Nitronic 60
- Valve: high-temp stainless steel with plated stem
- V-band: CNC machined 304 stainless steel
- Flanges: full-machined 304 stainless steel
- Springs: 17/7 PH stainless steel
THERMAL SPECS
- Maximum Exhaust Gas Temperature, peak: up to 1050 degrees C
- Maximum thermal stress (non-cooled): 270 degrees C actuator body temperature during thermal cycle testing
- Maximum thermal stress (watercooled): 130 degrees C body temp during thermal cycle testing
*Direct Replacement for these other wastegates: TiAl MVR, Turbosmart 45mm, Precision 46mm
GARRETT VENT | EXTERNAL WASTEGATES ARE OUTLINE AND FLANGE COMPATIBLE WITH, BUT IS DESIGNED TO OUTFLOW, OTHER GATES
