While stationary in the pit lane on a track day, I observed the intake air (IAT) temperature exceed 70°C. It took almost a full lap at speed to cool down the intake air again.
High intake temperature sets of a series of events which reduces engine power and response.
- Increased risk of engine ignition knock / detonation
- The engine ECU retards ignition timing above 30°C IAT
- If the ECU detects ignition knock, the ignition timing will be further retarded by the ECU