Quote:
Originally Posted by PaleMelanesian
Wasn't designed for MPGs. Metro may have a thing or two to say / do about that before this is over. 
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Lookee here what I done found!
(From: http://hanchagroup.wordpress.com/201...esign-is-best/)
Racing products design company
Hancha did a CFD analysis on 5 different air dam/splitter combinations on a 1st gen Miata.
1)
Cd 0.36 = "stock" model: (actual car is 0.38, but CFD model has smooth floor & wheels); 38 hp @ 100 mph
6)
Cd 0.29 = model #6 with large air dam & splitter, reduced ride height; 31 hp @ 100 mph.
Neato!
(Although it does seem to be missing cooling inlets.)
Full article, analysis of various other front end treatments:
Splitter or Air Dam – Which Design is Best?