Originally posted by Vishnu Performance
Hey, doesn't anyone want to know why this works? I don't think anyone has asked that yet... any guesses?
The ECU will go into a learning mode when the following conditions are met:
- Engine RPM is less than or equal to 5000 RPM
- Manifold Absolute Pressure is greater than or equal to 900 mmHg (17.4 PSI)
- Engine Coolant Temperature is greater than 70°C (158°F)
During this learning mode, the ECU is bascially judging your octane level and trying to figure out how far it can advance ignition timing toward maximum brake torque timing without sufferring too much knock.