Borg Warner EFR 8474 T4 1.05ar Twin Scroll EWG Turbocharger

12747100019, 12747100017, 12741019002
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Borg Warner EFR 8474 T4 1.05ar Twin Scroll EWG Turbocharger
The EFR8474 is a brand new release for 2019 and represents the state-of-the-art from BorgWarner Turbo Systems. This unique turbo was designed specifically by BW engineering to combine the high flowing 68mm compressor inducer with a low inertia (fast spooling) 84mm exducer to allow the same footprint to breathe a LOT better up top without compromising down low and midrange.  Efficiency plateaus are widened as a result.  RPM Capabilities have also been re-evaluated in which higher pressure ratios can be better utilized.That’s a 21.8% improvement in flow for a little bit of offset spool RPM, all on the same sized turbo!  Using the same 74mm Gamma-Ti turbine wheel from the EFR8374, this turbo flows an impressive 95lbs/min of air at the same 127k RPM maximum shaft speed.  EFR8474 is intended for applications which will push a turbo to the limit with high boost.  This hybrid turbo uses the lightweight alloy bearing housing derived from Indycar with an aggressive 68mm inducer compressor wheel.

Compressor Specifications:
Compressor Type: Forged-Milled Wheel (FMW) Extended Tip
Compressor Wheel OD (exducer): 84mm
Compressor Wheel Inducer: 68mm
Max Flow Rate: 95 lb/min
Built-in BOV: All EFR compressor housings incorporate an integrated compressor recirculation valve

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

Using Borg Warner’s 84mm FMW compressor (68mm inducer) the 8474 houses our traditional 7 blade EFR extended-tip compressor wheel design capable of 95 lb/min airflow rate. Ceramic Ball Bearing only, watercooling optional (recommended). 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 12747100019, 12747100017, 12741019002
Brand BorgWarner
Type of Part EFR 8474 (950HP)
Horsepower Gains 500 - 950 HP
Length 15
Width 15
Height 15
Weight 28.000000
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