Quote:
Originally Posted by motorhead
Hell my ecoboost f150 runs at 13PSI. What's PSI matter anyways when the engine is designed to run under those conditions.
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Because higher PSI means more octane is needed to ward off detonation. In order to compare boost you at least need to know how much compression the engine is at. A lower compression engine running high boost can have the same maximum cylinder pressures as a high compression engine running low boost.
Note the comparison is based only on pressures and not all other variables like volume (CFM), temperature etc.