ocr: JULUMEIRICEFFILIENLY The ratio of the volume of air entering the engine to its lisplacement per combustion cycle. In general, large valves and short intake and exhaust passages make for high volumetric etticiency. High engine speeds tend to reduce it, but racing engines used "tuned" intake and exhaust pipes in order to raise volumetric etticiency at one specific speed. WORK ork as used in these discussions eans torce through distance. Units are FOot-Pounds or Newton-Meters. The area enclosed in a P-U diagram is proportional to the amount of Work performed.
