MSV70 and Valvetronic will not accept boost with a piggyback. This is the #1 mistake people make when they think they can just "build" a kit for these cars and get away with the programming via a "piggyback or standalone".
The only proper way to build a supercharger or turbocharger kit for these cars is by reprogramming the MSV70 DME. That being said, MSV70 uses 1024 bit encryption keys which are not twice the complexity of the older 512 bit keys, but 6.6 x 1,000,000,000,000,000,000,000,000,000,000 times more complex. Good luck cracking that.
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