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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 02-24-2009, 11:57 AM   #1 (permalink)
MPG...what?
 
Join Date: Jan 2008
Location: Finksburg, MD
Posts: 145

Terkle - '97 Toyota Tercel Whitehawk
90 day: 40.91 mpg (US)

Bubble - '10 Toyota Yaris base
90 day: 41.88 mpg (US)

Deva - '13 Chevrolet Spark LS
90 day: 39.82 mpg (US)

Malibu5 - '82 Chevrolet Malibu Classic
90 day: 17.61 mpg (US)

Highlander - '06 Toyota Highlander Limited
90 day: 21.24 mpg (US)
Thanks: 8
Thanked 2 Times in 2 Posts
Send a message via AIM to malibuguy
rear wheel skirts...

for the people who have done them, how much of a gain is there? I'm pondering making some for my tercel...

__________________
-Greg...the exhaust freak.

-06 Highlander 3.3awd
-10 Yaris sedan
-97 Tercel, 1NZfe swapped
-96 Tercel
-82 Malibu 1UZfe swapped
-19 Fit (wifey ride)



www.pipedreamsfab.com
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-24-2009, 05:37 PM   #2 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,762

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,585
Thanked 3,555 Times in 2,218 Posts
I have no fe instrumentation... only calc fe tank-to-tank... had skirts and other aeromods on too for quite a while. Couldn't detect change that could be attributed to aeromods.

Not saying it's impossible. Saying results are so small- if any- you'd have a hard time noticing it. And an even harder time proving it.

Do it if it makes you feel good, or are curious. Just don't expect any miracles.
  Reply With Quote
The Following User Says Thank You to Frank Lee For This Useful Post:
aerohead (07-22-2017)
Old 02-24-2009, 07:30 PM   #3 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,203

CM400E - '81 Honda CM400E
90 day: 51.49 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)

Daox's Volt - '13 Chevrolet Volt
Thanks: 2,501
Thanked 2,585 Times in 1,553 Posts
They looks like they're good for around a 3% increase.

Testing grille blocking & wheel skirts: +5.7% improvement - MetroMPG.com
http://ecomodder.com/forum/showthrea...-camry-84.html
__________________
Current project: A better alternator delete
  Reply With Quote
Old 02-24-2009, 11:15 PM   #4 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,907

Mica Blue - '05 Scion xA RS 2.0
Team Toyota
90 day: 42.48 mpg (US)

Forest - '15 Nissan Leaf S
Team Nissan
90 day: 156.46 mpg (US)

Number 7 - '15 VW e-Golf SEL
TEAM VW AUDI Group
90 day: 155.81 mpg (US)
Thanks: 3,475
Thanked 2,950 Times in 1,844 Posts
Hi,

On my xA, the front grill blocks and fog light covers added ~10-12%, and the smooth wheel covers added ~6%, and yes the rear wheel skirts are ~2 to maybe 3%.
__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
Old 02-25-2009, 07:38 AM   #5 (permalink)
MPG...what?
 
Join Date: Jan 2008
Location: Finksburg, MD
Posts: 145

Terkle - '97 Toyota Tercel Whitehawk
90 day: 40.91 mpg (US)

Bubble - '10 Toyota Yaris base
90 day: 41.88 mpg (US)

Deva - '13 Chevrolet Spark LS
90 day: 39.82 mpg (US)

Malibu5 - '82 Chevrolet Malibu Classic
90 day: 17.61 mpg (US)

Highlander - '06 Toyota Highlander Limited
90 day: 21.24 mpg (US)
Thanks: 8
Thanked 2 Times in 2 Posts
Send a message via AIM to malibuguy
so it looks like its minor...i'll worry about doing a partial under tray first...that should make a bigger difference

i also need to smooth out the rear from the rear axle beam to the bumper
__________________
-Greg...the exhaust freak.

-06 Highlander 3.3awd
-10 Yaris sedan
-97 Tercel, 1NZfe swapped
-96 Tercel
-82 Malibu 1UZfe swapped
-19 Fit (wifey ride)



www.pipedreamsfab.com
  Reply With Quote
Old 02-25-2009, 06:53 PM   #6 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,513

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

MPGiata - '90 Mazda Miata
90 day: 52.71 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: 60.16 mpg (US)
Thanks: 4,058
Thanked 6,957 Times in 3,602 Posts
It depends (TM)...

If the rear wheels are right at the back corner (less bodywork aft for detached flow to reattach on), I think skirts will have a bigger impact.

Also depends on the size of the vehicle's tire/wheel arch gap, the rim design (unless you've got smoothies on), wheel offset...

I agree with Frank: for a normal car, you likely won't be able to see the results over the usual tank-to-tank noise.

Also see:

http://ecomodder.com/forum/showthrea...-camry-84.html
__________________
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
The Following User Says Thank You to MetroMPG For This Useful Post:
aerohead (07-22-2017)
Old 02-25-2009, 07:09 PM   #7 (permalink)
Master EcoModder
 
Join Date: Oct 2008
Location: Mid-Atlantic
Posts: 491

OurInsight - '06 Honda Insight
Thanks: 170
Thanked 69 Times in 44 Posts
I have skirts on my Echo and Scangauge instrumentation. I made before and after, two-way tests on a windless day. It looks to me from the scangauge data that the improvement was about 1.4%, near as I could tell. Might be worth more on a Metro, as someone above mentioned. I wouldn't be able to see that small change on a tank-to-tank basis.

Last edited by jime57; 02-25-2009 at 07:10 PM.. Reason: expansion
  Reply With Quote
The Following User Says Thank You to jime57 For This Useful Post:
aerohead (07-22-2017)
Old 02-25-2009, 07:27 PM   #8 (permalink)
EcoModding Lurker
 
Join Date: Dec 2008
Location: seattle
Posts: 72
Thanks: 0
Thanked 1 Time in 1 Post
As for the undertray it seems as though the amount of benefit is dependent upon how high your car is and how rough the underbody is. If your car sits low to the ground already then the undertray may not be that effective. However, the higher it sits and the rougher the underside then it may have more of an effect. That's what I gleaned from reading a VERY long thread on the subject. If I misinterpreted it then by all means let me (and everyone else) know.

PS When doing your aeromods try to do the ABA testing so you have before and after mod baselines for comparisons. Thanks.
  Reply With Quote
The Following User Says Thank You to Daveedo For This Useful Post:
Nautilus (07-18-2017)
Old 02-25-2009, 07:40 PM   #9 (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
One good thing about the under tray vs other mods, even if it's not that great of an aero-improvement, it helps to keep your engine bay clean, which is nice for when you're working in there.

Also, a clean engine could be running more efficiently than a dirty one. The grease and grime kind of holds the heat into the engine, in the wrong places, IMO. I prefer to keep it clean. A bottle of simple green and some water will get you a long way in making the underhood area a little more tolerable to mess with.
  Reply With Quote
Old 02-25-2009, 09:42 PM   #10 (permalink)
Master EcoModder
 
Join Date: Jan 2009
Location: Maui, Hawaii
Posts: 813
Thanks: 5
Thanked 34 Times in 26 Posts
Not sure I'd spray Simple Green in the engine bay. It softens some polymers. RC vehicle guys soak tires in SG to make them softer and gripper.

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY: plastic rear wheel skirts (Geo Metro) MetroMPG DIY / How-to 57 06-12-2014 09:16 AM
Done: A-B-A test on rear wheel skirts - Corolla, Camry Hybrid MetroMPG Aerodynamics 11 06-06-2009 03:49 PM
Rear wheel skirt / cover question pasadena_commut Aerodynamics 5 02-16-2009 04:50 AM
crx hf help need more info, rear wheel skirts RP-CLMBR Aerodynamics 2 07-16-2008 09:24 PM
Video: tuft testing rear wheel skirts - Geo Metro MetroMPG Aerodynamics 6 07-11-2008 08:26 AM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com