Borg Warner EFR 8374 Turbo

Description

EFR 8374 is engineered to support big power levels yet spool fast enough for professional time attack teams. The 74mm Gamma-Ti turbine wheel is an optimal match for the 62.6mm inducer / 83mm exducer FMW compressor wheel and is capable of 79lb/min airflow. This is one of the most exciting turbos in the EFR lineup for the high-power addicts. This turbo has the largest EFR compressor housing and is ideal for use in single turbo applications for the 500-800hp range, or as twin turbo applications up to 1300hp. Ceramic Ball Bearing only, watercooling optional (recommended)

Compressor Specifications

• Compressor Type: Forged-Milled Wheel (FMW) Extended Tip
• Compressor Wheel OD (exducer): 83mm
• Compressor Wheel Inducer: 62.6mm
• Max Flow Rate: 79 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

Turbine Specifications

• Turbine Type: Low Inertia Gamma-Ti Turbine Wheel
• Turbine Wheel OD: 74mm
• Stainless Steel Turbine Housing – The EFR 8374 is available in (3) different turbine housing configurations, all use 3″ vband (92mm OD): [list]
• 0.83 A/R T3 Single Scroll (Internal WG) – Part # 179258
• 0.92 A/R T4 Twin Scroll (Internal WG)- Part # 179357
• 1.05 A/R T4 Twin scroll (external WG)- Part # 179393

Features

• Dual Row Ceramic Ball Bearings – lowest friction and fastest spool/response, most extreme durability, built-in oil control orifice – (aka oil restrictor) **no restrictor can be used with EFR turbos
• Watercooled Center Section – watercooling is recommended, 14mm banjo bolts
• Double seals on both turbine and compressor end for extreme durability and resistance to any oil seepage
• Boost Control Solenoid Valve Integrated to Compressor Housing
• Integrated Speed Sensor mounting provisions

Low Inertia Turbine Wheel
Gamma-Ti turbine wheel cuts turbine inertia by roughly 50% dramatically improving turbo response.  Turbine sizes range from 55 to 80mm in exducer diameter.

Heat Resistant Turbine Housings
Investment cast stainless steel turbine housings improve durability and offer an offer extremely smooth internal flow channel. Turbine housings have thin walls to reduce weight and thermal inertia.

High Turbine Efficiency
Superback” and “Fullback” back-disk shapes offer very high efficiencies. The Superback shape adds a curved profile to the back-disk and has the effect of lowering centrifugal stress and permitting higher rotational speeds.

Enhanced Turbo Response
EFR turbochargers use a dual-row ball bearing cartridge with ceramic balls and metal cage.  This bearing system provides substantial friction reduction at low turbo speeds and in the process helps improve turbo response.  Metal cage improved the durability of the ball bearing assembly

Flexible Compressor Cover
The EFR turbo “large” cover has a dual-machined outlet, both for a hose connection and a v-band connection.

Simplified Installation
Integrated compressor recirculation valve (CRV) to help avoid compressor surge and backflow during a throttle lift event.  This feature helps to simplify the installation task and lowers overall system install cost.

Forged Milled Compressor Wheels (FMW)
EFR turbos contain wheels that are fully milled from forged aluminum, commonly known as “billet”.  Cut from custom forgings, their strength exceeds that which is available from typical bar-stock and also exceeds the material properties of an aluminum casting

Sensor Mounting Convenience
Speed sensor mounting provisions are also supplied on every compressor cover.  Speed sensors are sold separately.

Boost Control Solenoid Valve (BCSV)
A boost control solenoid valve (BCSV) is included with every EFR turbo.

High Flow Wastegates
Purpose designed large wastegate ports give the wastegated EFR turbos the capability of handling the flow requirements of high performance applications.

Ease of Orientation
Turbo orientation flexibility is facilitated by the wastegate bracket to bearing housing mounting arrangement.

Adjustable Wastegate
The fabrication and installation task is simplified with wastegated EFR models that feature adjustable wastegates available in three different canister sizes.