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Old 02-22-2009, 10:06 PM   #31 (permalink)
Bicycle Bob
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Join Date: May 2008
Location: N. Saskatchewan, CA
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Appliance White - '93 Geo Metro 4-Dr. Auto
Last 3: 42.35 mpg (US)

Stealth RV - '91 Chevy Sprint Base
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Yes, that's the general principle. Because of valve overlap, manifold resonance, and so on, the efficiency numbers don't plot in smooth curves, but the trend is always there. Most of the time, we have an engine that works best at high speed and load, operating at low speed and load, with various bits fighting each other or causing friction to little purpose.

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