The 1.5-litre Dragon engine fitted to the Mk8 Fiesta ST utilises a VDE (Variable Displacement Engine) setup which seamlessly deactivates one cylinder when cruising, or on coast-down to help with increasing fuel-efficiency and reducing Co2 output.
However, eagle-eared owners can pick up the somewhat strange noise this activation causes and in particular, when replacing or upgrading the exhaust system, this audible change becomes very apparent (and not in a good way)!
To support our future exhaust product releases and for m235 owners that have already fitted aftermarket exhaust products, our revised m235 calibration option allows existing m235 customers with modified exhaust systems to de-activate the VDE and prevent this noise from occurring.
Please specify your vehicle VIN in the notes section when checking out. and if the email used to make this purchase is different to the one used for your original m235 purchase, please also supply that to ensure the industrialised calibration to support your vehicle is created and sent to you correctly.
The file emailed to you can then be opened via the SMARTflash app and installed to your ecu, as is the case with all previous calibration updates.
Please note: you will require an m235 SMARTlash upgrade / app to be able to install this companion calibration.
Now, having the cylinder deactivation calibration, i am using the "normal" drivemode quite more often. On the one hand in the city, beacause sports mode is a little bit too aggrerssive in the rushhour, and on the other hand for travelling with 130kmh on the freeway. The annoying 2-cylinder sound was the reason not to use the "normal" mode before and sports mode for long distance travelling was too noisy. Good job, mountune.