Weistec BMW S55 W.1 ECU Tune

Product Details

All 2020 models require bench flashing at this time.  If you have a 2020 Model, please contact us at 330-331-2003.

ECU Tuning Process: www.weistec.com/howtotune
 

The Weistec S55 tune provides solid gains through out the entire powerband, with signifigant peak to peak gains as well as large mid range gains!  This is on an otherwise 100% stock vehicle, including the air filters!

In addition to the performance gains, there are a couple options available for race vehicles.  First is the "Burble".  The M4 GTS comes from the factory with this in a mild form.  You can choose "Off" "Mild" or "Aggressive" for the "Burble".  Many seem to prefer aggressive, but we gladly will let you choose based on your preference.

The other race vehicle option would be Catalyst Heating.  On race vehicles, many times the catalysts are removed.  In those cases, there is no need for the catalyst heating which would just be making excessive noise on a cold start of the race vehicle.  If you have a race vehicle with the catalysts removed, Catalyst Heating can be disabled.
 

Once you place your order for the tune and the Cypher Handheld, we ship you the handheld complete in a case with all necessary cables and a USB drive. On that USB drive is a PDF instruction manual for the tuning process. The Cypher must first be updated using the link the PDF instruction manual then paired to the vehicle to either read the stock file or identify the software versions on the ECU. After that process, the handheld is connected to a PC so that you can download the ID file and email it to [email protected] so that they can begin the process of making your tune file. Once ready, an encrypted file which contains both the stock file and the tune file, will be sent back to you. You upload the file to the handheld and then use the handheld to flash the car.

• No need to send in your ECU / DME computer
• Swap tunes file or return the stock within minutes.

What does all this mean to you?  More power, sharper throttle response, and consistent performance with out sacrificing refinement. 
 

Key Features:

• Improved Throttle Response

• Optimized Fuel, Spark, and Boost

• M4 GTS "Burble" Mild and Aggressive Options (for Race Vehicles only)

• Disabled Cold Start (for Race Vehicles only)

• Disabled Speed Limiter

*Power gains vary based on model, modifications, fuel, and running conditions.

*Must be purchased with Cypher Handheld Programmer Tuner, Please see ES#4707682 (included in this kit).

Prop 65 Warning

Kit Contents

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Lifetime Replacement