Go Back   EcoModder Forum > EcoModding > Aerodynamics
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-20-2008, 01:23 PM   #81 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
CD - nice MX3.. i've never really looked at one and thought of it like that...

Still, you need to remove at least 200 lbs before adding that boat-tail to it... in all fairness LOL.

__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-20-2008, 03:38 PM   #82 (permalink)
EcoModding Apprentice
 
dichotomous's Avatar
 
Join Date: Nov 2008
Location: vermont
Posts: 142

CivySi - '03 honda civic SI
90 day: 31.99 mpg (US)
Thanks: 0
Thanked 1 Time in 1 Post
chevy is really good at making aero cars..... stingray corvette, cleaned up bodywise I doubt you could do much better



[img[http://imagecache2.allposters.com/images/pic/DES/D694~Chevy-Corvette-Stingray-Posters.jpg[/img]




and there are a few 7th gen civic Si's running around with RSX-s transmissions which are 6speed and have a taller final drive, they get signficiantly better gas milage. one guy thew the type s final on his Si gears with a TSX 5th added as 6th (confused yet?) for much taller gears (he also has a bored and stroked with a LOT more power) and gets around 38mpg out of it. this vs my stock motor with almost 100less hp and stock gears at 10mpg less....
__________________

Last edited by dichotomous; 11-20-2008 at 04:30 PM..
  Reply With Quote
Old 11-20-2008, 07:08 PM   #83 (permalink)
Cd
Ultimate Fail
 
Cd's Avatar
 
Join Date: Feb 2008
Location: Austin,Texas
Posts: 3,345
Thanks: 2,707
Thanked 947 Times in 561 Posts
Quote:
Originally Posted by dichotomous View Post
chevy is really good at making aero cars..... stingray corvette, cleaned up bodywise I doubt you could do much better


and there are a few 7th gen civic Si's running around with RSX-s transmissions which are 6speed and have a taller final drive, they get signficiantly better gas milage. one guy thew the type s final on his Si gears with a TSX 5th added as 6th (confused yet?) for much taller gears (he also has a bored and stroked with a LOT more power) and gets around 38mpg out of it. this vs my stock motor with almost 100less hp and stock gears at 10mpg less....
Hate to say it, but some of the most streamlined LOOKING cars are actually aerodynamic nightmares.
  Reply With Quote
Old 11-20-2008, 07:32 PM   #84 (permalink)
Cd
Ultimate Fail
 
Cd's Avatar
 
Join Date: Feb 2008
Location: Austin,Texas
Posts: 3,345
Thanks: 2,707
Thanked 947 Times in 561 Posts
Quote:
Originally Posted by MetroMPG View Post
PS - Cd, your artistic & photoshopping skills are impressive! Nice work.

Thanks !
Did you happen to notice the modified Metro with wheel skirts ?
( I also posted an image of your Flea with a tow-a-long boattail. I'm not sure if you saw it or not.)


  Reply With Quote
Old 11-20-2008, 08:12 PM   #85 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
So... I wasn't read in on this.. does the boat-tail trailer help as much as a standard boat-tail would? or even close?

Is there a different airflow profile to consider when working with a towbehind rather than the actual vehicle's body?
__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Old 11-20-2008, 10:39 PM   #86 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,381

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 52.07 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 50.04 mpg (US)
Thanks: 3,920
Thanked 6,771 Times in 3,512 Posts
Christ: probably not as much, owing to the additional rolling resistance & drag caused by the trailer tire(s). Not to mention added weight.

Aside from that, designed well, it could potentially make a significant improvement. See: http://ecomodder.com/forum/showthrea...p-fe-5698.html

Cd: I missed the Flea trailer, but saw that white choptop treatment.
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 11-20-2008, 11:20 PM   #87 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
MetroMPG - Thank you.

I wonder if I can use something of that.. since I like to haul stuff with my car... like car parts lol.

I use my car as a truck.

I also would love to drive that white metro photochop. That's a sweet looking ride, even though it's fake.. and yes, I saw the drag-race EV metro lol. I'd make it road legal.
__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Old 11-21-2008, 05:32 PM   #88 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 14,195
Thanks: 22,047
Thanked 6,612 Times in 4,162 Posts
Corvette

Quote:
Originally Posted by dichotomous View Post
chevy is really good at making aero cars..... stingray corvette, cleaned up bodywise I doubt you could do much better



[img[http://imagecache2.allposters.com/images/pic/DES/D694~Chevy-Corvette-Stingray-Posters.jpg[/img]




and there are a few 7th gen civic Si's running around with RSX-s transmissions which are 6speed and have a taller final drive, they get signficiantly better gas milage. one guy thew the type s final on his Si gears with a TSX 5th added as 6th (confused yet?) for much taller gears (he also has a bored and stroked with a LOT more power) and gets around 38mpg out of it. this vs my stock motor with almost 100less hp and stock gears at 10mpg less....
The Corvette shown,with stock wheels and tires measured Cd0.45.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 11-21-2008, 07:56 PM   #89 (permalink)
MechE
 
Join Date: Dec 2007
Location: Bay Area
Posts: 1,151

The Miata - '01 Mazda MX-5 Miata
Thanks: 0
Thanked 21 Times in 18 Posts
Quote:
Originally Posted by dichotomous View Post
chevy is really good at making aero cars..... stingray corvette, cleaned up bodywise I doubt you could do much better



[img[http://imagecache2.allposters.com/images/pic/DES/D694~Chevy-Corvette-Stingray-Posters.jpg[/img]




and there are a few 7th gen civic Si's running around with RSX-s transmissions which are 6speed and have a taller final drive, they get signficiantly better gas milage. one guy thew the type s final on his Si gears with a TSX 5th added as 6th (confused yet?) for much taller gears (he also has a bored and stroked with a LOT more power) and gets around 38mpg out of it. this vs my stock motor with almost 100less hp and stock gears at 10mpg less....
Curvaceous lines is not an indication of an aerodynamic car

For example, 1969 Opel GT, lots of curvyness that screams to the masses "air just gets out of my way."


A = 1.51 m^2
cD = .41 --- not too bad for the time period

And the 1974, VW Scirocco... Screams "I'm a boxy car, listen to the turbulence I make!"



A = 1.73 m^2
cD = .41


There's likely many other examples with cars that are "boxy" versus "curvy" with identical form drag numbers

------
For the OP:
I would put neither of those cars on the list
Attached Thumbnails
Click image for larger version

Name:	309555_7_full.jpg
Views:	614
Size:	29.9 KB
ID:	2193   Click image for larger version

Name:	web-volkswagen-scirocco-gt-1978.jpg
Views:	589
Size:	34.8 KB
ID:	2194  
__________________
Cars have not created a new problem. They merely made more urgent the necessity to solve existing ones.
  Reply With Quote
Old 11-22-2008, 06:40 AM   #90 (permalink)
Master EcoModder
 
Join Date: Feb 2008
Location: belgium
Posts: 663

vectra a - '95 Opel Vectra GLS
90 day: 37.51 mpg (US)
Thanks: 14
Thanked 61 Times in 44 Posts
i think perhaps a worhty winner would be the 1970 citroen sm



0.26Cd ! and not to much frontal area by the looks of it it's got a smooth underside that slopes up gently... a true drop on wheels

__________________
aer·o·dy·nam·ics: the science of passing gass

*i can coast for miles and miles and miles*
  Reply With Quote
The Following User Says Thank You to lunarhighway For This Useful Post:
Cd (05-21-2021)
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Video: clever, simple demo of teardrop shape -pointy end first vs. blunt end first MetroMPG Aerodynamics 12 11-21-2015 04:04 PM
Electric car conversion: Project ForkenSwift MetroMPG Fossil Fuel Free 1041 07-28-2014 09:19 AM
Can I use a GENERATOR to power an Electric car directly? Nerys Fossil Fuel Free 128 10-01-2012 01:24 AM
Win $100.00 in Free Gas! Design Contest: Ecomod my Ride XFi EcoModding Central 127 02-17-2011 12:07 AM
My First Electric car Experience WaxyChicken The Lounge 8 09-05-2008 08:46 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com