BNR ST71 V2 Turbocharger Upgrade
High-Output Turbocharger for Auxiliary Fuel Setups
The BNR ST71 Turbocharger Upgrade is engineered for vehicles equipped with an auxiliary fuel system and supporting modifications. Designed to support output levels of up to approximately 500 wheel horsepower, this configuration is suited for builds targeting higher airflow capacity and increased peak power potential.
Compared to the ST67 configuration, the ST71 turbocharger exhibits an estimated 300 RPM later spool threshold, while delivering roughly 100 additional peak horsepower when operating at maximum efficiency. Applications planning for auxiliary fueling and/or forged internal engine components will benefit most from this turbocharger configuration.
Turbocharger Assembly Components
- BNR G30-660 center housing rotating assembly (VSR balanced)
- BNR T04B compressor housing with 2-bolt inlet (.60 A/R)
- BNR 10cm (.72 A/R) exhaust housing
- 30mm internal wastegate with heavy-duty swing valve assembly
- Adjustable internal wastegate with stainless mounting bracket (15 psi suggested for 91 octane fuel)
- Cast iron turbine inlet adapter
- Cast iron turbine outlet adapter
- Multi-layer turbine inlet and outlet gaskets for BNR housing
- 2-bolt aluminum compressor inlet adapter with integrated O-ring
Included Hardware and Oil System Components
- Stainless M10 1.5 studs, nuts, and washers
- M10 1.5 Allen head bolt for turbine outlet adapter
- Stainless M8 1.25 studs and flanged nuts for compressor inlet adapter
- 60mm ID O-ring (2mm diameter)
- Aluminum oil inlet adapter with M12 1.5 stainless banjo bolt
- Copper washers for oil and water inlet/outlet connections
- Upgraded stainless oil outlet tube with O-rings (standard on units purchased after 2/15/2024)
The BNR ST71 V2 Turbocharger Upgrade provides a comprehensive turbo system solution for high-power applications requiring increased airflow, durable internal components, and compatibility with auxiliary fueling strategies.