[barney911rs]

I'm not as familiar with the newer engines, but the Motronic would probably have to be modified to make much use of the agressive cams. The 911 motor is pretty efficient from the factory, simple and/or cheap mods usually don't get you much power. To get more power you need to look at the whole thing. Intake, Cams, Compression, Ignition, Exhaust, Fuel Delivery, and the bits needed to support those changes.