 coeff of drag numbers on our cars |
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| realred914 |
 Nov 17 2010, 10:52 AM
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#1
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Senior Member  Group: Retired Members Posts: 1,086 Joined: 1-April 10 From: california Member No.: 11,541 Region Association: None  |
coeff of drag:::: condtion:
.363::: all windows closed, roof on, lights down .380::: all windows closed roof on, lights up .381::: all windows open, roof on, lights down .389::: all windows closed roof off, lights down .447::: all windows open, roof off, lights down .464::: all windows open, roof off, lights up worse case verses best case is a 28% change in drag coeff. data from Up fixin der Porsche vol V, pg 314 |
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| Eric_Shea |
Nov 17 2010, 10:55 AM
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#2
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PMB Performance Group: Admin Posts: 19,275 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains  |
What is all windows open, roof on, lights up? (IMG:style_emoticons/default/biggrin.gif)
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| Elliot Cannon |
Nov 17 2010, 10:56 AM
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#3
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914 Guru Group: Retired Members Posts: 8,487 Joined: 29-December 06 From: Paso Robles Ca. (Central coast) Member No.: 7,407 Region Association: None
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A very significant difference. With my 3.2 liter car, with the windows up and roof on I get 26 MPG. With the rooff off and windows down I get 23 MPG.
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| Tom_T |
Nov 17 2010, 06:11 PM
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#4
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TMI.... Group: Members Posts: 8,318 Joined: 19-March 09 From: Orange, CA Member No.: 10,181 Region Association: Southern California
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QUOTE(Eric_Shea @ Nov 17 2010, 08:55 AM)  Well Eric, it's ...... ummmm ...... not on the list, so you obviously should NOT drive that way! (IMG:style_emoticons/default/laugh.gif) Thanx for posting these realred! |
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| URY914 |
Nov 17 2010, 07:27 PM
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#5
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,578 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
No windshield, no roof, no windows, no headlights, big wing?
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| Eric_Shea |
Nov 17 2010, 07:34 PM
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#6
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PMB Performance Group: Admin Posts: 19,275 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
QUOTE No windshield, no roof, no windows, no headlights, big wing? Probably about the same as this: (IMG:http://www.914world.com/bbs2/uploads_offsite/www.damencnc.com-1110-1290044096.1.jpg) (IMG:style_emoticons/default/tongue.gif) (IMG:style_emoticons/default/biggrin.gif) |
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| Sleepin |
Nov 17 2010, 07:42 PM
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#7
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Advanced Member Group: Members Posts: 3,647 Joined: 20-November 07 From: Grand Junction, Co. Member No.: 8,357 Region Association: Rocky Mountains |
I think mine would be better with the front and back doors to my garage open...usually the wind just blows right around the jackstands!
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