More and more people are starting to run the Syvecs engine management system on E9X M3's including in forced induction applications. The example here is an ESS-Tuning VT2-625 supercharged S65.
Now, it is important to note the tune that comes with the ESS kit is a canned tune meaning the same software for each application. A custom dyno tune will pick up large gains and with the additional capability the Syvecs S6 offers a skilled tuner can extract massive gains without changing the boost or fuel.
Just look a the result:
Another 46 horsepower at the wheels. That is just from superior tuning alone. Also, keep in mind the correction factor on the Dyno is set to 1.0 meaning no correction.
The S65 V8 BMW application from Syvecs certainly looks promising.