Even with no dyno, it’s achievable to carry out a terrific career of tuning the ignition timing (if the spark plug fires), and for that you will need an Audio Knock Detection system to observe for knock. (View this video clip to hear what knock looks like) The best way https://bmwremap71245.worldblogged.com/35681729/not-known-facts-about-audi-a4-b9-turbo-upgrade