BrenTuning 2006 M6 S85 V10 ECU/TCU tune only dyno results - + 40 wheel horsepower on 93 octane
Great gains here from vendor BrenTuning
located in Charlton, Massachusetts. They were able to gain 40 horsepower at the wheels and 24 lb-ft of torque at the wheels with software only on an otherwise completely stock 2006 BMW E63 M6. The tuning changes include a flash to the ECU (engine control unit) as well as TCU (traction control unit) software changes for the SMG transmission. The result is smooth gains throughout the entire rev range.
This software can also be flashed at home using their handheld OBD-II flashing unit. They can of course also adjust the tune based on modifications such as headers, exhaust, race gas, etc.