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2026. 6. 30. 작업

증상

Is there a 1:1 relationship between boost pressure and power increase?

처리 내용

Preamble What does forced induction buy? In a word, density . Remember: For compressible fluids, pressure alone doesn't tell the full story But pressure and temperature together do. The old physics adage "hot air rises, cold air sinks" is a great example of this. Air at the same pressure but different densities at different temperatures. The internal combustion engine is a volumetric device What this implies is that every time the engine turns over and completes a cycle, the volume of air that is admitted into the combustion chamber(s) is fixed. Power depends on mass, not volume The power developed by the engine is proportional to the mass of air admitted into the combustion chamber and not its volume. So more dense = more air molecules per cylinder = moar power So, is the ratio 1:1? No. Because physics said so. Time to break out ye olde Evo example with the 85% efficiency turbocharger: At atmospheric conditions (14.7 psi, 25 °C) Air density = 1.184 kg/m^3 With 22 psi of boost, air den