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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 06-10-2009, 05:37 PM   #61 (permalink)
AeroGuy
 
eco_generator's Avatar
 
Join Date: Sep 2008
Location: Ohio
Posts: 220

Outback 14 - '14 Subaru Outback Limited
90 day: 25.36 mpg (US)
Thanks: 68
Thanked 26 Times in 24 Posts
Nice work!

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 06-10-2009, 05:45 PM   #62 (permalink)
Master EcoModder
 
Join Date: Jan 2009
Location: Maui, Hawaii
Posts: 813
Thanks: 5
Thanked 33 Times in 26 Posts
Quote:
Originally Posted by sepp View Post
yes there is one with a few nice bolt holes in it, but it doesn't reach out up to the front bumber. there is like a big 2 feet gap.
but actually between the front and rear tires the underside is surprisingly flat and easy to cover. the problem is that gigantic rear differential that is one foot lower than anything else, and thanks to the leaf springs it can do some acrobatic up and down and twisting movements.
the front isn't gonna be easy either, my brain starts overheating as soon as i try to figure how on earth im gonna cover such a complex thing.
I would just ignore the differential. It should be pretty aerodynamic since it's rounded, and the axletubes aren't that big.

But you could direct air under the axle, or to the sides with a V shaped thing, like the front of a boat. A completely flat bottom isn't gonna happen.
  Reply With Quote
Old 06-11-2009, 01:06 PM   #63 (permalink)
Master EcoModder
 
Join Date: Mar 2009
Location: Northeast Ohio
Posts: 269

The Wife's Hot Rod - '09 Pontiac G8 GT
Last 3: 23.22 mpg (US)

Big Outback - '13 Subaru Outback 2.5i

Little Outback - '02 Subaru Impreza Outback Sport
Thanks: 0
Thanked 16 Times in 16 Posts
Undertray

The undertray could stop just short of the axle tube swing & cut out a section around the differential. Then make piece of sheet metal that attaches to the diff. housing & extends forward of the cutout in the undertray. You could make teardrop shaped covers for your axle tubes from sheet metal. Then pick up with the undertray just behind the swing of the housing & axles. Turn up the leading edges of the parts so not to catch air.

Mudflaps

Would extending the mudflaps back to the rocker panels in a teardrop fashion help reduce drag as well as protect your truck? You may try a pliable rubber material that would deflect out of the way when met by an offroad obstacle.

Don
  Reply With Quote
Old 06-11-2009, 01:49 PM   #64 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,247

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

MPGiata - '90 Mazda Miata
90 day: 52.8 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 73.57 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 55.99 mpg (US)
Thanks: 3,004
Thanked 5,882 Times in 3,049 Posts
Congrats, sepp: your aerocap won the latest Mod of the Month competition!
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



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 06-11-2009, 02:10 PM   #65 (permalink)
Master EcoModder
 
FastPlastic's Avatar
 
Join Date: May 2008
Location: Ames, IA
Posts: 419

98 Cherokee - '98 Jeep Cherokee
90 day: 17.18 mpg (US)

ZX7R Ninja - '99 Kawasaki ZX7R Ninja
90 day: 42.45 mpg (US)
Thanks: 4
Thanked 13 Times in 12 Posts
Quote:
Originally Posted by DonR View Post
The undertray could stop just short of the axle tube swing & cut out a section around the differential. Then make piece of sheet metal that attaches to the diff. housing & extends forward of the cutout in the undertray. You could make teardrop shaped covers for your axle tubes from sheet metal. Then pick up with the undertray just behind the swing of the housing & axles. Turn up the leading edges of the parts so not to catch air.

Mudflaps

Would extending the mudflaps back to the rocker panels in a teardrop fashion help reduce drag as well as protect your truck? You may try a pliable rubber material that would deflect out of the way when met by an offroad obstacle.

Don
Sounds a little like what I've been working on. Can't say I went to all the work of making the tear drop shape. If you want to take a look at what I've got so far: Jeep Cherokee Aero Mods - Page 2. I found the best place to start is a front skid plate if your truck doesn't already have one.

__________________

Adjusted for my driving habits. 80%city/20%Highway.
20mpg city/30mpg highway or bust! Check out my mods so far

Last edited by FastPlastic; 06-11-2009 at 02:18 PM..
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
nissan kingcab aerocap sepp Aerodynamics 45 12-07-2016 06:59 AM
2008 Dodge Dakota AeroCap electricman Aerodynamics 52 10-08-2011 11:47 AM
aerocap or tonneau? (build thread?) ModelE Aerodynamics 9 01-04-2009 10:36 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com