Engine - Overview

Introduction 

The exclusive variant of the newly developed and specially adapted 2.3-liter EcoBoost gasoline engine develops 257kW (350PS).

The following components have been modified: 

• Cylinder Head
  • New aluminum alloy (AS7GU) to improve the heat dissipation.

• Cylinder head gasket
• Exhaust-side valve springs
  • The strength of the valve springs has been reinforced

• Engine block
  • New, high-strength engine block to reduce wear at high temperatures and under high loads.
  • Machined cylinder block to make space for the transfer case

• Flywheel
  • Redesigned dual-mass flywheel to absorb vibrations and other undesired NVH (noise, vibration, harshness) error states
  • Modified DW10F clutch with 'TAC' (Travel Adjusted Clutch) technology enables higher overboost torques and is automatically adapted to the wear

• Crankshaft pulley
  • The pulley is specially adapted to the RS engine

• TC including connections
  • The TC is equipped with a new turbine and a larger compressor wheel (2.3622in (60mm) to 2.4803in (63mm)). This permits a higher boost pressure and ensures improved aerodynamics

• Crankcase ventilation
  • The flow rate has been increased from 17 liters per minute to 45 liters per minute

• Oil filter adapter seal
  • A new, synthetic oil is used for the 2.3L EcoBoost for improved lubrication and durability

Torque and power output diagram 

Courtesy of FORD MOTOR COMPANY

The fine-tuning of all the components gives the Focus RS an impressive operating range. It delivers a spontaneous response in the lower engine speed range, develops a high torque of 440 Nm at medium engine speeds and makes it constantly available between 2000 and 4500 RPM, and peaks at 6800 RPM. The overboost control increases the maximum torque to 470 Nm for 15 seconds under full acceleration.