Hello together I have an Audi 80 avant quattro with Ng engine. It runs well and is re-set. That means: ignition to 17 before OT. CO to 0.4 before Kat. Pressure selector tom in the tolerance of +/- 0.3. Fuel consumption at 10.5l/100km- Hab these tuning parts installed. namely: 200 cell kat Fox complete system 63.5 mm. own construction air filter box with K&N-pilz throttle valve without wedge The following parts I have now got and want to build them up and that is: 3-flow manifold ABT Süko camshaft T 300 305 285 (285° with 10.8 mm stroke hydro wave) cylinder head I would like to plan this by 6 centel. I also want to cut the inlet and outlet on sealing size and polish it. I would like to leave the ignition system original for the time being. Now my question. What cylinder copper seal should I use? Do I need to build a chip? If so which and into which control device (engine or ignition engine) I would have set the ignition nozzle as well as the turbo meter?