overboost

verb

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.”

noun

1. (uncountable)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.”

   “A manifold pressure overboost control is usually employed to reduce the possibility of overboost occurring. However, when overboost occurs, combustion temperatures rise, and detonation or preignition may result and cause serious structural damage to the engine.”

2. (countable)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.”