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Originally Posted by cheetah
So are each of these tuning companies cracking the binary code themselves and independently, or is there a basic program that is able to interface and write to ROM?
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Ultimately, most of these "tuners" have either in-house technicians or outside affiliates that have knowledge and experience that allows them to access Porsche's binary codes and "tables", therefore allowing them to rewrite ecu programs for better performance. Some of these programs are genetic. Meaning, only a modicum of change is made to the ecu program in order to keep things "safe" and uniform amongst the respective models. Whereas other software tuners have the ability to create or tailor programs based on the specific modifications that have been made to the vehicle. FVD/Brombacher and Evolution Motor Sports are two that come to mind.