2014 Ford Focus ST Supplement Printing 1 - Page 14

Driving Your Focus ST ENGINE OVER-REV Note: Always wait until the engine is properly warmed up before running high engine speeds. Your vehicle is equipped with an over-rev feature to increase the performance range of your Focus ST. The standard maximum engine speed of 6500 RPM is indicated by a narrow redline on the tachometer face. The redline becomes thicker at the over-rev engine speed of 6800 RPM. This feature allows three seconds of over-rev above 6500 RPM. Once the three second limit has been reached, the electronically controlled rev limit ramps down to 6500 RPM and holds there. Once engine speed has dropped below 6300 RPM, the over-rev timer is reset and three seconds of over-rev up to a maximum of 6800 RPM is enabled. Do not operate the engine at high RPM and low load for sustained periods of time, as damage may occur. OVERBOOST The Focus ST offers a period of additional torque delivery referred to as overboost or overtorque. This feature of the engine calibration broadens the RPM range of the peak torque curve. This gives improved performance during maneuvers such as passing and vehicle launch. Note: The overboost feature controls a variety of engine parameters to deliver additional torque. Overboost is built into the engine calibration on the Focus ST and no action is required by the driver to engage. 13 2014 Focus ST (stf) Supplement, 1st Printing, June 2013 USA (fus)