What are the main reasons for turbocharger delay?

1. The inertia of impeller rotation requires acceleration, which takes a certain amount of time.

2. Friction between the shaft and the bearing.

3. The resistance formed by the impeller stirring the air.

The resistance formed by the impeller stirring the air is the main reason for the delay of the turbocharger, precisely because the increase in the speed of the entire rotor takes time. The larger the impeller of the turbocharger, the greater the boost value, the longer the required acceleration time, and the more obvious the delay.