Thread: REAR SPOILERS: Length-'Angles'
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Old 06-12-2011, 09:23 PM   #3 (permalink)
California98Civic
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Join Date: Mar 2011
Location: Coastal Southern California
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Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

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Quote:
Originally Posted by aerohead View Post
The original CAR and DRIVER mods to the 1974 Ford Pinto altered the rear angle from 26-degrees,to 23-degrees( Hucho's maximum angle recommendation[22-degrees by W.A.Mair]),@ 37% aft-body,using the 30-degree up-swept rear spoiler,for a 7% mpg improvement ( 11.6% drag reduction )
Same spoiler,straight back = 1.36 % mpg improvement
Thanks for a very useful post. I estimated the angle of my 98 Civic's rear window at about 23*. And I just did a tuft test that has me wondering: http://ecomodder.com/forum/showthrea...tml#post244751
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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