Boost

Boost Actual

The measured boost pressure in the intake manifold at any given moment.

Why it matters

Comparing actual to target reveals whether the boost control system is working properly. Persistent under or overboost is a red flag.

What to look for

Should closely track boost target during steady-state WOT. Oscillation or sustained deviation means investigation is needed.

Related terms

Boost Target

The boost pressure the tune is requesting. Actual boost should track this closely.

Wastegate Duty CycleWGDC

How hard the ECU is working to keep the wastegate closed and maintain boost. 0% = fully open, 100% = fully closed.

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