Up for sale is a BorgWarner EFR B2 9274 Turbo Super Core Assembly with Cast Iron Bearing Housing
which includes the Super Core & Compressor Cover
Specifications:
Compressor Type: Forged-Milled Wheel (FMW) Extended Tip
Compressor Wheel OD (exducer): 91mm
Compressor Wheel Inducer: 72mm
Max Flow Rate: 106 lb/min
We can include the Turbine Housing of your choice at an additional cost, just message us after you have placed the order.
The EFR 9274 is Available in (4) Different Turbine Housing Configurations:
0.83 A/R T3 Undivided (Internal WG) #12741008000
0.92 A/R T4 Twin Scroll (Internal WG) #12741008001
1.05 A/R T4 Twin Scroll (External WG) #12741019002
1.45 A/R T4 Twin Scroll (External WG) #12741008003
Please review BorgWarner's turbo systems warranty, they offer a 12 month limited warranty.
B2 EFR Turbo
The "B2" housing in the BorgWarner EFR turbocharger lineup is specifically engineered for larger turbine wheels and high-power applications, distinguishing it from smaller housings such as the "A" series. Its increased size allows for greater airflow and higher power potential, making it ideal for demanding, high-horsepower setups.
Designed to accommodate larger engines and higher boost requirements, the EFR B2 series turbos are optimized for applications where maximizing performance and airflow is critical. For those seeking a turbocharger capable of supporting a high-power engine, the EFR B2 housing offers the capacity and efficiency necessary for superior results.
BorgWarner EFR 9274 Turbocharger Overview
The BorgWarner EFR 9274 represents the next stage in evolution following the acclaimed EFR9174, bringing unmatched airflow and high-performance capabilities to motorsport applications. Designed to cater to competitive drift and time attack builds, especially at higher altitudes, the 9274 excels in environments demanding extreme boost pressures and high turbo shaft speeds.
Innovative Design for Superior Performance
The EFR 9274 blends the expansive 91mm compressor exducer with a 72mm compressor inducer, enabling significantly enhanced top-end breathing while maintaining the compact footprint of its predecessor. This turbo leverages BorgWarner’s renowned 74mm Gamma-Ti turbine wheel, achieving an exceptional 106 lb/min airflow capacity at a maximum shaft speed of 125,000 RPM.
To ensure versatility across various setups, the EFR 9274 is offered in four turbine housing configurations:
0.83 A/R T3 Undivided (Internal WG) (#12741008000)
0.92 A/R T4 Twin Scroll (Internal WG) (#12741008001)
1.05 A/R T4 Twin Scroll (External WG) (#12741019002)
1.45 A/R T4 Twin Scroll (External WG) (#12741008003)
Key Features
Crafted to push the limits of turbo performance, the EFR 9274 integrates advanced technology and robust materials to ensure reliability under extreme conditions:
Gamma-Ti Turbine Wheel: Low inertia for rapid response and high durability
Dual Row Ceramic Ball Bearings: Enhances spool time and longevity, minimizing friction
Integrated Compressor Recirculation Valve (CRV): Built into all EFR compressor housings for smoother operation
Boost Control Solenoid Valve (BCSV): Incorporated into the compressor housing for precise boost regulation
Water-Cooled Center Section: Improves durability and cooling, with 14mm banjo bolt fittings
Double Seals: Provides superior oil control on both turbine and compressor ends
Speed Sensor Provisions: Pre-configured for seamless installation of speed sensors and monitoring systems
Compressor and Turbine Specifications
Compressor Specifications:
Type: Forged-Milled Wheel (FMW) with Extended Tip Technology
Wheel OD (Exducer): 91mm
Wheel Inducer: 72mm
Max Flow Rate: 106 lb/min
Inlet: 4″ Ported Shroud Hose Coupler
Outlet: 2.5″ Hose Coupler with optional V-Band integration
Turbine Specifications:
Type: Gamma-Ti Low Inertia Wheel
Wheel OD: 74mm
Housing Material: Stainless Steel
Outlet: GT V-Band (~92mm OD)
Proven Track Record
The EFR 9274 stands out as the second largest turbocharger in BorgWarner’s EFR Black Series, earning recognition from elite motorsport professionals. Esteemed drivers like Fred Aasbo, Ryan Tuerck, Jhonattan Castro, and Ryan Litteral have incorporated this turbo into their competitive drift vehicles, highlighting its reliability and performance. Compared to the EFR9280, the 9274 delivers faster spool and enhanced overspeed resistance, although it encounters higher backpressure at elevated RPM and boost levels.
Applications and Compatibility
Designed for engines demanding extreme airflow and robust performance, the EFR 9274 is suitable for setups pushing the turbo to its operational limits. It excels in single-turbo applications for engines ranging from 2L to 6L and can complement twin-turbo configurations in larger V6 and V8 platforms. The EFR 9274 offers a balance of early spool and powerful top-end performance, making it a preferred choice for high-horsepower drift, time attack, and motorsport builds.
