Quote:
Originally Posted by Blacktree
^THIS
Every vehicle will have a 'sweet spot' where it's most fuel efficient. The vehicle's aerodynamic efficiency will have a strong affect on that. The better the aero, the higher that sweet spot will be.
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In the past, General Motors Research Laboratory warned that, unless an aero-modified vehicle received gear-matching, to return the engine to original loading, that 70% of the streamlining benefit could be lost because the engine was shifted to a less efficient island of its BSFC map.
So we'd want this specificity when discussing aerodynamics and mpg.