Borg Warner EFR 9274 T4 1.05ar Twin Scroll EWG Turbocharger

12747100023, 12747100021, 12741019002
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Borg Warner EFR 9274 T4 1.05ar Twin Scroll EWG Turbocharger
The EFR9274 is a brand new release for 2019 from BorgWarner Turbo Systems.  Representing the next evolution of the wildly popular EFR9174, the brand new EFR9274 is intended for applications which will push a turbo to the limit with high boost and critically high turbo shaft speed. Recommended for competitive drift and time attack applications, this unique turbo was designed specifically by BW engineering to combine the high flowing 91mm compressor exducer with 72mm compressor inducer to shift the surge line and allow the same footprint to breathe a LOT better up top.  Efficiency plateaus are widened as a result.  RPM Capabilities have also been improved with higher pressure ratios acheived at lower turbo shaft speed.  Using the same 74mm Gamma-Ti turbine wheel from the EFR9174, this turbo flows an impressive 106lbs/min of air at 125k RPM maximum shaft speed.

Compressor Specifications:
Compressor Type: Forged-Milled Wheel (FMW) Extended Tip
Compressor Wheel OD (exducer): 91mm
Compressor Wheel Inducer: 72mm
Max Flow Rate: 106 lb/min
Built-in BOV: All EFR compressor housings incorporate an integrated BOV.

Compressor Housing Connections:
Inlet: 4″ Ported Shroud Hose Coupler
Outlet: 2.5″ Hose Coupler w/ integrated Vband option

Using Borg Warner’s 91mm FMW compressor (72mm inducer) the 9274 houses the 7 blade extended-tip EFR compressor wheel design with an aggressive trim, capable of 106 lb/min airflow rate. Ceramic Ball Bearing only. We strongly recommend using an EFR Speed Sensor if you plan to run to the limit.

Turbine Specifications - T4, Twin Scroll, 1.05AR, Externally Wastegated:
Turbine Type: Low Inertia Gamma-Ti Turbine Wheel
Turbine Wheel OD: 74mm
Stainless Steel Turbine Housing
Turbine outlet: GT V-Band (aka 3″ V-Band) ~92mm OD for all EFR turbos

More Information
Part Number 12747100023, 12747100021, 12741019002
Brand BorgWarner
Type of Part EFR 9274 (1050HP)
Horsepower Gains 600 - 1050 HP
Length 15
Width 15
Height 15
Weight 28.000000
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