BorgWarner EFR 8370 Turbo

The BorgWarner EFR 8370 Turbo Won Pikes Peak 2x in a row

When fast response and early spool are mission critical, the twinscroll EFR8370 delivers the boost that it takes to win.  As evidenced by 2021 and 2022 Pikes Peak Championship winner Robin Shute, the 450hp to 700hp capable EFR 8370 combines the high-pressure ratio compressor from the EFR 8374 with the turbine from the EFR 7670.  This is a match made in heaven if high boost pressure and high altitude will push your pressure ratio and rotor speeds to the limit.  

Features

• Dual Row Ceramic Ball Bearings—lowest friction and fastest spool/response, most extreme durability, built-in 2mm oil restrictor
• 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
• Optional Turbo Speed Sensor Kit
• Optional Turbo Speed Gauge
• EFR 8370 is available in (3) different turbine housing configurations
  • 0.83 A/R T3 Undivided (Internal WG) #12701008014
  • 0.92 A/R T4 Twin Scroll (Internal WG) #12701008016
  • 1.05 A/R T4 Twin Scroll (External WG) #12701019047

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 compressor recirculation valve
• Compressor Inlet: 4″ Ported Shroud Hose Coupler
• Compressor Outlet: 2.5″ Hose Coupler w/ integrated Vband option

Turbine Specifications

• Turbine Type: Low Inertia Gamma-Ti Turbine Wheel
• Turbine Wheel OD: 70mm
• Stainless Steel Turbine Housing
• Turbine outlet: GT V-Band (aka 3″ V-Band) ~92mm OD for all EFR turbos

Compressor Map

Why we love the EFR 8370

A useful option for customers looking to utilize higher airflow and boost pressures than the 7670 can support without stepping up to the larger 8374. The 70mm turbine wheel provides additional pressure ratio margin, allowing for high boost without overspeed - especially at altitude.  

If you have questions about this product or its installation, contact us.