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The SimosWiki

This site is dedicated to tuning the Simos(18) family of ECUs commonly found in the MQB platform of VW/Audi cars.

As with anything, you make modifications at your own risk. Nobody else is responsible for anything that happens while you're tuning your car.

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SIMOS is a registered trademark of CONTINENTAL AUTOMOTIVE GMBH. This site has no affiliation.

Select a topic from the left nav bar or the links below

High level overview of ECU operation

Boost Management

Fueling Management

Editing Software

Eurodyne Maestro (and HPTuners as of late 2020) are the only software suites that allow for end user modifications to the calibration tables

Eurodyne Maestro Tables is an overview of the tables available in Eurodyne Maestro

Helpful Links

Note: External links will attempt to open in a new tab
Cobb TuningVolkswagen MQB Tuning Guide
Understanding AFR and Lambda