Save your stock idle cam map first. Then, on a dyno or quiet street, increase exhaust cam retard by 5° increments at 800–1000 RPM / 0% load. Log misfire counts. The moment you see misfire spikes or MAP drops below 35 kPa — back off 2°. That’s your ghost cam limit.
Want me to expand this into a full guide section with actual map axis examples and safety warnings? Eurodyne Maestro Tuning Guide
— if you dial it too far, idle vacuum drops, and the ECU’s idle stabilizer fights back. The trick is finding the “sweet spot” where the engine sounds aggressive but doesn’t stall. Maestro allows real-time idle logging of cam adaptation and airload , so you can actually watch the ECU compensate. Some tuners even map this effect only when coolant temp > 70°C, so cold starts remain smooth. Save your stock idle cam map first