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Guys I can't believe people are being so cavalier about tricking the ECU to run more boost on the S63tu. It already runs at 22psi vs 17in the S63 with a 10.1 vs 9.1 compression ratio. BMW obviously tuned the S63tu to make similar power as the S63 with less fuel consumption . Until the ECU is cracked all these piggyback solutions are adding is tons of extra heat , with a little power for maybe 1-2 pulls . This is best case as in the Manhart stage 4 as it also has an ECU tune . To just up the boost without changing the ECU by more than maybe 1 psi could be disastrous and will be minimally effective. Be patient real tunes will come . But running a setup not even designed for the S63tu is just stupid .
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