Engine Over-Rev - Ford Focus ST Supplement Manual

ENHANCED TORQUE VECTORING CONTROL
Enhanced torque vectoring control (eTVC) is comprised of two elements:
• Torque vectoring control which applies brake torque on the inner
wheel in a curve for better traction and less understeer
• Cornering understeer control which controls the yaw response of the
vehicle under braking and acceleration on high and low friction
surfaces.
Unlike ESC, eTVC control does not slow the vehicle but does help
control excessive wheel slip and gives the vehicle cornering agility. The
system only increases performance. Because of this, eTVC is not disabled
when the AdvanceTrac system is off.

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.
2013 Focus ST (stf)
Supplement, 1st Printing
USA (fus)
Driving Your Focus ST
13