03-26-2007, 02:44 PM
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#1
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Registered User
Join Date: Sep 2006
Location: chicago
Posts: 3,510
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windows down or A/C on?
did you guys see the myth busters episode on that?
they took 2 same trucks, eptied out their gas tanks, and put exactly 5 gallons of fuel and ran them around the track.
truck with the A/C blowing stopped about 15 miles before the truck with the windwos open did.
pretty neat.
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"I couldn't find the sports car of my dreams, so I built it myself." ~F. Porsche
Gemballa springs::litronics::Eurotech 18s(275/225)::B&M::MOMO wheel::
exhaust cutouts::EVOcoldair intake::OEM smoked tails & sidemarkers::
colormatched bumperettes::Top Speed Pro-1 exhaust::
my cardomain/pictures page
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03-26-2007, 02:55 PM
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#2
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Registered User
Join Date: Jul 2006
Location: Where the Sewer Meets the Sea, CA. USA
Posts: 2,695
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Yeah, and supposibly driving with the A/C on and windows up should have been more economical but it totally wasnt... sorta like the tailgate down on a truck is worse than tailgate up on a truck.
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03-26-2007, 03:18 PM
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#3
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Registered User
Join Date: Nov 2006
Location: Virginia
Posts: 846
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I didn't see it, but, how fast were they driving? I would guess that above, say, 50mph the aero drag of open windows is greater than the hp drag of an a/c unit. Guess this test might bear that out.
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1976 914 2.0
2000 Boxster 2.7 (sold)
1978 911 SC (sold)
1970 914 w/2056 (sold)
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03-26-2007, 04:24 PM
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#4
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Registered User
Join Date: Dec 2006
Location: Browns Summit, NC
Posts: 271
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What about top down, windows up, a/c on?
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03-26-2007, 04:26 PM
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#5
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Guest
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Quote:
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Originally Posted by dmcutter
What about top down, windows up, a/c on?
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Not recommended. But, I hear people in very-very hot climates do it for some relief.
On a rental car, I would do it.
Last edited by bmussatti; 03-26-2007 at 04:29 PM.
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03-26-2007, 05:22 PM
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#6
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Registered User
Join Date: Sep 2006
Location: chicago
Posts: 3,510
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they were traveling 45 mph
__________________
http://i34.tinypic.com/157yslk.jpg
"I couldn't find the sports car of my dreams, so I built it myself." ~F. Porsche
Gemballa springs::litronics::Eurotech 18s(275/225)::B&M::MOMO wheel::
exhaust cutouts::EVOcoldair intake::OEM smoked tails & sidemarkers::
colormatched bumperettes::Top Speed Pro-1 exhaust::
my cardomain/pictures page
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03-26-2007, 06:08 PM
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#7
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Registered User
Join Date: Oct 2006
Location: Griggstown, NJ
Posts: 30
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Quote:
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Originally Posted by djomlas
did you guys see the myth busters episode on that?
they took 2 same trucks, eptied out their gas tanks, and put exactly 5 gallons of fuel and ran them around the track.
truck with the A/C blowing stopped about 15 miles before the truck with the windwos open did.
pretty neat.
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Would this apply to cars which are more aerodynamic? I've always heard that windows up with A/C is more economical than windows down with no A/C.
Ken
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03-26-2007, 06:52 PM
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#8
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Registered User
Join Date: Mar 2006
Location: CA, USA
Posts: 40
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Does anyone on this board really think anything other than top down driving is worth considering?
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2008 Carrera S Cabriolet, Meteor Grey Metallic, Stainless Steel Exhaust Pipes, Heated Front Seats, Navigation, Floor Mats – I know the Porsche ones suck but they came with the car, Park Assist, Power Seats, Self Dimming Mirrors, 19 inch Sport Design Wheels – Classic Car and Classic Wheels, Bose, Sports Chrono Plus. Mods so Far: XPEL Clear Bra, Smart Top, Dension iPod Integration, Clear Side Markers
2001 MB CLK320 with a collection of performance mods.
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03-26-2007, 08:38 PM
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#9
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Registered User
Join Date: Oct 2006
Location: Seattle, WA
Posts: 213
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Quote:
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Originally Posted by CJ_Boxster
Yeah, and supposibly driving with the A/C on and windows up should have been more economical but it totally wasnt... sorta like the tailgate down on a truck is worse than tailgate up on a truck.
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Yeah - I loved this episode. I've always told my wife that a tailgate down did nothing to help fuel efficiency. Finally someone publicly proved it. All those boners I see on the road with their tailgates down... makes me giggle.
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2002 Boxster S
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03-26-2007, 08:55 PM
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#10
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Registered User
Join Date: Feb 2006
Location: Illinois
Posts: 701
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Quote:
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Originally Posted by MartinJ
Does anyone on this board really think anything other than top down driving is worth considering?
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better question, have you posted any pics of your white bady boy? just curious if I missed them, can't see enough white ones....
must edit, I know your car, I've seen the pics on the other board, well i do admitt to driving top down AC on.......sometimes its just too hot
Last edited by super66; 03-26-2007 at 08:58 PM.
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