Custom Focus ST Tune / Focus ST custom tune / Focus ST custom tuner
Tunewerks powered CBKB Rally Team Focus ST
Focus ST Custom Tune ECU Calibration by Tunewerks
Tunewerks custom tune Focus ST
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  • Load image into Gallery viewer, Tunewerks powered CBKB Rally Team Focus ST
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Focus ST Custom Tune ECU Calibration by Tunewerks

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Focus ST Custom Tune

Maximize the performance of your Focus ST with a Tunewerks custom and FULLY optimized ECU tune for your Cobb Accessport. Nothing will surpass custom tuning when it comes to increasing the output of your turbocharged hot hatch! With high quality fuel you can expect average peak to peak gains of 20+ WHP and 80+ WTQ compared to the stock ECU calibration.

Our test vehicle gained 24 horsepower and 93 ft. lbs. of torque AT THE WHEELS, as seen in the dyno chart. Off peak gains are just as impressive with a 50 WHP increase at 3500 RPMs!

Custom Focus ST Tune / Focus ST custom tune / Focus ST custom tuner

PRO TIP: For even greater gains select 100 octane, E30, or E40 fuel options when placing your order. Just be sure you have access to the chosen fuel. Using the incorrect fuel with a purpose built ECU calibration can lead to serious engine damage!

Tunewerks custom tune Focus ST

Focus ST custom tuning and optimized ECU calibrations from Tunewerks are built to your specifications based on vehicle modifications, octane, elevation, environment, and preferences. We go beyond the standard OTS files included with the Cobb Accessport, tapping into our 22+ years of Ford ECU calibration experience, taking full advantage of your vehicle’s modifications and potential. Engine performance is optimized by reviewing data logging files along with program revisions and feedback from the end user in real world driving scenarios.

There are reasons why rally teams such as Team O'Neil Motorsports, LaRoza Racing, O.D.D. Racing, CBKB Rally Team, Hovinga Motorsports, and Pura Vida Rally Team have repeatedly used custom tune services by our calibration staff... Experience. Dedication. Championships.

Tunewerks powered CBKB Rally Team Focus ST

Our goal is to deliver the safest, most reliable power available, but we are equipped to push the envelope for those who are after the very highest output achievable. Conversely, we are able to accommodate those who prefer to have something more conservative, as well.

Custom programming options include, but are not limited to:

  • On-the-Fly MAP (slot) switching
  • Launch Control settings
  • Flat Foot Shifting settings
  • Ethanol (E30 & E40) support
  • 100+ Octane support
  • Gear Based Torque Limiting
  • Shift Assist settings
  • Burn Out Mode
  • Idle adjustment
  • Rev Limiters
  • Speed Limiters
  • Shift Light settings
  • Advanced Wastegate adjustments
  • Low Traction / Wet Weather settings

Tunewerks Optimized ECU Calibration Slots

Tunewerks calibrations include 5 slots that are switchable anytime. Using the steering wheel Cruise Control buttons allows for quick slot changes whenever needed. The default settings for the Focus ST are:

  • Slot 1 - Custom High Performance Calibration
  • Slot 2 - Custom High Performance Calibration with indicated Launch Control and Flat Foot Shifting
  • Slot 3 - Low Boost / Gas Miser Mode
  • Slot 4 - Panic Mode / Bad Fuel Mode
  • Slot 5 - Wastegate Actuator Evaluation Mode

Easy to follow step-by-step data logging instructions are provided to help you get the most from your Tunewerks ECU calibration. 

The custom calibration and file revision period is 60 days from the time the first ECU calibration file is sent to the customer. Once the 60 day period has expired the custom calibration period ends. Future custom ECU calibrations are subject to additional fees depending on the exact nature of the request.

Important Note: Programming for any fuel system upgrades, such as upgraded Fuel Injectors or High Pressure Fuel Pump will incur extra costs. Aux Fuel systems are completely separate and may be possible to program, but will also incur extra costs. Contact us before installing any of these items to avoid unexpected circumstances.

PRO TIP: When increasing boost pressure and overall performance of your Focus ST, ensure the spark plug gap is properly set. We recommend 0.028" gap to avoid misfires.

If you have questions or need further clarification regarding our ECU calibrations please contact us at

Please note this ECU calibration is not intended for engine swaps or nitrous oxide applications and applies to the original purchaser only. This service is nontransferable and other restrictions may apply.

WARNING: This ECU calibration has been constructed and is intended for off-highway use only. Installation of this calibration on a vehicle that is driven on public roads may violate U.S. and Canadian laws and regulations relating to emission requirements and motor vehicle safety standards. Please check your local laws for emissions compliance information.