overboost

Etymology

Definitions

1. 1

   To increase an engine's intake manifold pressure to higher levels than it is designed for.

   • Morgan was waiting outside in the bay. Didn't even wait for me to say a word. "What happened? Why did you overboost? You could have blown the whole shuttle, the whole expedition."
   • Overboosting is not something that “just happens.” Usually, it's under the control of the pilot, or can at least be prevented by an alert pilot.
2. 2

   The process of overboosting.

   • These planes all have popoff valves, designed to prevent overboost, but the flow dynamics are such that manifold pressure can seriously overshoot redline before the popoff valve opens.
3. 3

   An instance of overboosting.

   • Manifold pressure exceeding the limit lines shown in figure 5-2, constitutes an overboost.
   • By delaying opening of the wastegate, the ECU could generate an overboost at full throttle, increasing boost pressure to 1.1bar, for a peak power delivery of 230bhp in short bursts of up to 30sec at a time.
   • Also, be careful you don't get an overboost or too much RPM when you reselect cold.

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