First you either have a 4.5 or a 4.8
Posche did not release a 4.2 TT
Sen=cond it is pintless in AT.
Need to shift in a manual box in the Turbo and remove the PASM.
This will create all sorts of problems and a rewiring is necessary.
Stick to big block american if you want burn outs.
Use the best available coolant as the temperature s set to rise this year, Check your cooler and radiators for leaks. If you have a leakget it seen to ASAP rather than waiting.
I assume you have a 928 or older model. Pulley for the air compressor is engaged and disengaged to the engine with the help of an electromagnetic clutch. I am not sure how they test this. It would seem obvious if it was not working as the compressor would not switch when you turned on the AC.
Thanks Asmir.
ARM are a very good and high class company, but on the expensive side (slightly). How do you know you need a new compartment. Maybe a gas refil. You will have to have a diagnosis first followed by pricing.