Product Description

BorgWarner EFR 8370-AL Turbo - T4 TwinScroll w/o WG 1.05ar

Genuine EFR-Turbocharger with Aluminium cartridge

Twin Scroll, T4 Flange, External Wastegate, 1,05 A/R

Tailoring to the needs of the end users that push pressure ratio and rotor speeds to the limits, the 475 to 700 HP capable EFR 8370 pairs the high pressure ratio compressor stage form the EFR 8374 with the turbine stage from the EFR 7670. The tip speed of the 70mm turbine wheel is slower than the 74mm turbine wheel rotating at the same shaft speed. The lower tip speed provides additional altitude and pressure ratio margin. This hybrid rotor group also introduces a useful option for customers looking to bridge the gap between our most popular B1 turbo (EFR 7163) and B2 turbo (EFR 8374).
Performance rating 475 - 700
compressor wheel Inlet 62mm, outlet 83mm
turbine wheel Inlet 61mm, outlet 70mm
turbine housing 1.05 A/R with T4 twinscroll flange, V-Band downpipe connection
CHRA type B2-series, all turbine housings for the EFR-7670 will also fits for EFR-8370

BorgWarner EFR turbocharger has been developed with only one goal in mind: to dominate road, racetrack and quartermile. BorgWarner EFR turbocharger are equipped with state of the art high-tech features for unbeaten performance.
EFR Turbos are available in different sizes and different turbine housings, covering performance ratings from 250 to 1100HP.
The combination of a high-efficiency compressor wheel, Gamma-Titanaluminid turbine wheel, with ceramic ball bearing technology dramatically raises the bar for motorsports turbochargers and is state of the art in terms of turbocharger technology:

Compressor:
- black anodized forged and milled compressor wheel, extremely lightweight and resistant to highest boost levels, Extended tip technology
- integrated blow off valve
- integrated boost solenoid
- 360° rotation via V-band technology
- prepared socket for speed sensor (optionally available) to monitor compressor wheel speed. Thereby compressor efficiency can be calculated.

Core assembly:
- dual ceramic ball bearing with metal cage
- integrated oil restrictor
- water cooled

Turbine housing:
- stainless steel turbine housing
- Gamma-Titanaluminid turbine wheel and shaft, 50% lighter than comparable Inconel turbine wheeland extremely heat resistant up to 1050°C (for comparison: Garrett only up to 950°C)
- high-flow wastegate port
- internal wastegate (also available for Twinscroll turbine housings!)