Driving Hints; Engine Overspeed; Engine Overboost - Ford Focus ST 2017 Owner's Manual Supplement

ENGINE OVERSPEED

WARNING
Do not operate the engine at high
engine speeds while the vehicle is
stationary. This can cause damage
not covered by the vehicle Warranty and
can result in serious injury.
Your vehicle has an engine speed limiter
that helps increase engine performance.
A narrow red line on the tachometer face
indicates the standard maximum engine
speed. The red line thickens where the
engine speed enters the overspeed limiter.
The system allows a maximum of three
seconds of engine overspeed. After this,
the engine speed limiter reduces engine
speed and holds it at a predetermined
limit. Once the engine speed drops below
the predetermined limit, the system resets
and permits a further three seconds of
engine overspeed.
Note: Do not run the engine at high engine
speeds until it reaches the normal operating
temperature.

ENGINE OVERBOOST

Your vehicle has an engine overboost
feature to allow additional torque delivery.
The overboost feature controls a variety
of engine parameters to deliver additional
torque. This feature widens the engine
speed range of the peak torque curve,
giving maximum performance while
passing another vehicle or launching from
a standing start.
2017 Focus ST (CDH) ST, Canada/United States of America, HM5J 19A285 AB enUSA, Edition date: 201608, Second Printing

Driving Hints

The system allows a maximum of 20
seconds of engine overboost. After this
the system reduces turbo charger boost
and maximizes it at a predetermined limit.
Once the turbo charger boost drops below
the predetermined limit the system resets
and a further 20 seconds of engine
overboost is permitted.
Note: You do not need to take any action
as the system allows overboost when you
demand it.
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