Or if you know anyone with an android device, you can get the free torque app, and one of these:
Amazon.com: iSaddle Super Mini ELM327 V1.5 OBD2 OBD-II Bluetooth CAN-BUS Auto Diagnostic Tool for Windows XP, Vista, Win7, OSX and Android: Automotive
and check all kinds of generic types of OBD2 data. It won't display cam deviation or overrevvs or anything porsche specific, but all the good things are there: actual water temp, engine fuel trim and loads, timing, maf reading etc..I and many others can attest it works great