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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 06-04-2008, 11:42 PM   #1 (permalink)
EcoModding Lurker
 
Join Date: Apr 2008
Location: Angola, IN
Posts: 5

White Lightning - '99 Chevy Malibu LS
90 day: 33.29 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Aeromods on a 99 Malibu

Hello to everyone, I stumbled across this sight about six months ago and I've been reading/lurking ever since. Back in March I was inspired to the point of adding rear wheel skirts to my car, pics below. Now that school has let out for the year I finally have some time to take my aeromodding to the next level. Today I got some sheets of coroplast and fashioned a front air dam that I'm planning on adding to my car this week. I thought I would post some pics here to get some feedback and suggestions before making anything final.
Obviously there won't be any masking tape on the finished product.


Let me know what you think.


Currently I have my wheel skirts off as my car is having some work done on it. I'd like to have them back on and the front air dam finished before I begin my cross country trip from Indiana to California.

Attached Thumbnails
Click image for larger version

Name:	air dam low.jpg
Views:	141
Size:	95.5 KB
ID:	857   Click image for larger version

Name:	wheel skirts low.jpg
Views:	116
Size:	85.0 KB
ID:	859  
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 06-05-2008, 12:10 AM   #2 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,119

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

MPGiata - '90 Mazda Miata
90 day: 53.56 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: 64.03 mpg (US)
Thanks: 3,754
Thanked 6,568 Times in 3,405 Posts
Glad you decided to de-lurk. Welcome to the forum.

The rear skirts look good. I wonder about the front air dam though. There's some conflicting evidence that bigger is not always better in that department.

Phil (aerohead) has firmly repeated lately that the bottom of the dam shouldn't extend much past the lowest hanging components under the vehicle. Phil's advice is worth betting on.

I also had Hucho's aerodynamics book open again at lunch today and happened to spot a diagram showing that an air dam that's too low actually increases drag.

Unless you have the ability to test the vehicle in as-controlled-as-possible conditions before heading out on your road trip, I'd be inclined to go with a more conservative height there.
__________________
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: Oops, I did it again! Bought another cheap, 3-cylinder Mirage. Mods in progress...
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 06-05-2008, 12:15 AM   #3 (permalink)
Cd
Ultimate Fail
 
Cd's Avatar
 
Join Date: Feb 2008
Location: Austin,Texas
Posts: 3,324
Thanks: 2,659
Thanked 921 Times in 549 Posts
Looks good. The front end has a NASCAR look to it.
  Reply With Quote
Old 06-05-2008, 12:20 AM   #4 (permalink)
EcoModding Lurker
 
Join Date: Apr 2008
Location: Angola, IN
Posts: 5

White Lightning - '99 Chevy Malibu LS
90 day: 33.29 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the input. I've read a couple other threads around here dealing with air dams and arrived at the conclusion, as you suggested, that it may be best to trim the air dam so its not so low. I'll also probably do a partial belly pan back to the point of the inside of the usual front bumper, if that makes sense.
  Reply With Quote
Old 06-05-2008, 11:04 AM   #5 (permalink)
Veggiedynamics
 
Join Date: May 2008
Location: Alexandria, MN
Posts: 684

Volt12 - '12 Chevy Volt base
Thanks: 0
Thanked 12 Times in 10 Posts
to me the front airam looks too low also... really why push that air around your car that can slip under it unubstructed... raise it to the lowest point of the under carriage.. then next step consider a belly pan..

However looking good so far!! I so got to get my skirts made
__________________

  Reply With Quote
Old 06-05-2008, 12:38 PM   #6 (permalink)
Master EcoModder
 
Join Date: May 2008
Location: Auburn, NH
Posts: 451

Wicked Wanda - '99 VW Beetle GLS
90 day: 29.59 mpg (US)

Green Monster - '99 Ford Explorer Sport
90 day: 16.73 mpg (US)

Dad's Taxi - '99 Honda Odyssey EX
90 day: 24.23 mpg (US)
Thanks: 0
Thanked 2 Times in 2 Posts
How about blocking the grill before you try the airdam? Then do a smaller airdam while keeping an eye on water temp. Does your dash have a water temp guage?

I agree that it looks a bit large. If it looks too much like A NASCAR spoiler that isn't good. Those are designed to add front downforce. In general, downforce = drag.

A shorter dam with a belly pan would probably be better.

Happy testing!!!
__________________
  Reply With Quote
Old 06-05-2008, 01:14 PM   #7 (permalink)
EcoModding Lurker
 
Join Date: Apr 2008
Location: Angola, IN
Posts: 5

White Lightning - '99 Chevy Malibu LS
90 day: 33.29 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
My car doesn't have a water temp gauge so I won't be able to monitor it closely. I think what I'll be doing now after getting some feedback, is shortening the airdam and giving it an appearance more closely to the front of basjoos's civic. Then I'll do a partial belly pan from the front of the new nose. I'll post some pics once I work out a mock-up.
  Reply With Quote
Old 06-05-2008, 02:05 PM   #8 (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
what most gars with good aero seem to be doing is have the airdam lower in front of the tires and more sharply cut, and higer and smoother in the center to allow the air under,

perhaps you could cut down the sides a bit and fold back the center section below the bumper to form the undertray...
a coastdown test might hint at how well things work
__________________
aer·o·dy·nam·ics: the science of passing gass

*i can coast for miles and miles and miles*
  Reply With Quote
Old 06-11-2008, 11:37 PM   #9 (permalink)
EcoModding Lurker
 
Join Date: Apr 2008
Location: Angola, IN
Posts: 5

White Lightning - '99 Chevy Malibu LS
90 day: 33.29 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
update

About a week ago, I posted a mock up of a planned front air dam on my 99 Malibu. Based on suggestions here I made some changes. Its now shorter, rounded on the edges, and its angled as to deflect air upward and around the car.

Pictures are below. Also, there is a partial belly pan that is not visible in the pictures

I tested it out today on a 30 mile drive and I made a few observations. One, without having done a formal coast down test the car seemed to maintain speed slightly longer after after letting off the accelerator. And two, the engine was running a little hotter than usual so I will probably have to cut a small hole in the the front to let some air in to keep the temperature down.

The beauty of the air dam is that its attached to the car completely with velcro so its easy to remove and modify. Let me know what you think.
Attached Thumbnails
Click image for larger version

Name:	Snapshot 2008-06-11 23-27-47.jpg
Views:	87
Size:	28.6 KB
ID:	917   Click image for larger version

Name:	Snapshot 2008-06-11 23-31-34.jpg
Views:	72
Size:	28.4 KB
ID:	918   Click image for larger version

Name:	Snapshot 2008-06-11 23-32-29.jpg
Views:	72
Size:	28.2 KB
ID:	919  
  Reply With Quote
Old 06-12-2008, 12:15 PM   #10 (permalink)
Master Novice
 
elhigh's Avatar
 
Join Date: Jan 2008
Location: SE USA - East Tennessee
Posts: 2,307

Josie - '87 Toyota Pickup
90 day: 26.89 mpg (US)

Felicia - '09 Toyota Prius Base
90 day: 51.67 mpg (US)
Thanks: 421
Thanked 606 Times in 445 Posts
Your mileage results are super consistent. Could you tell us what the EPA estimates are for your combined driving? The mileage.gov website will do a quick little calculation for you based on your estimated percentages of city vs. highway and tell you what you should be seeing in general.

Like the airdam, that looks pretty slick. I've got to go ahead and make one of those for the truck.

__________________




Lead or follow. Either is fine.
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
2004-2008 Chevy Malibu (Review) RH77 General Efficiency Discussion 11 07-16-2014 04:04 PM
Malibu Hybrid bennelson Hybrids 17 12-21-2011 10:57 PM
Aeromods V1.0 trikkonceptz Aerodynamics 50 10-14-2011 11:30 AM
Review: 2008 Chevy Malibu LT (31.3 MPG) RH77 General Efficiency Discussion 12 05-16-2009 09:07 AM
Some nice Photoshop pics of aeromods from a Ford Taurus forum MetroMPG Aerodynamics 11 10-09-2008 03:16 AM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com