Among the most popular modifications for this platform is the —a technique that transforms a single-tune ECU into a "switchable" unit using nothing but the cruise control buttons on the steering wheel.
While robust and well-understood for tuning, the EDC15 has a fundamental limitation: it typically holds only (maps) for fuel injection, boost pressure, torque limitation, and smoke limitation. A "Multimap" (or "Switchable Tune") modification overcomes this by allowing the driver to switch between two or more complete, independent tunes stored on the ECU's flash memory. edc15 multimap
If you are looking to implement this yourself, the following community resources provide detailed technical guides and code snippets: EDC15 Multimap Tuning Guide | PDF | Subroutine - Scribd Among the most popular modifications for this platform