Go Back   EcoModder Forum > EcoModding > DIY / How-to
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 02-05-2010, 11:04 AM   This thread is in the EcoModder Project Library | #1 (permalink)
EcoModding Lurker
 
Join Date: Oct 2009
Location: Brantford, ON
Posts: 4

The Durd (retired) - '96 Geo Metro
90 day: 53.79 mpg (US)

The Durd II (retired) - '97 Geo Metro
Thanks: 0
Thanked 1 Time in 1 Post
Quick & Easy Kammback for Metro

I bought some clear acrylic sheet and was going to fabricate some kind of Kammback following the guides here but then I got lazy. I just eyeballed it, drilled some holes and put in some rivets... The acrylic cracked a bit when riveting but hasn't gotten any worse since driving. Rust will undoubtedly form at the holes too... Works well enough for me but I don't know what effect it has on fuel economy yet.

Click image for larger version

Name:	DSC_0033.JPG
Views:	174
Size:	115.5 KB
ID:	5549

Click image for larger version

Name:	DSC_0034.JPG
Views:	148
Size:	113.6 KB
ID:	5550

Click image for larger version

Name:	DSC_0035.JPG
Views:	111
Size:	107.8 KB
ID:	5551

Click image for larger version

Name:	DSC_0036.JPG
Views:	142
Size:	54.4 KB
ID:	5552

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-05-2010, 12:20 PM   #2 (permalink)
aero guerrilla
 
Piwoslaw's Avatar
 
Join Date: Oct 2008
Location: Warsaw, Poland
Posts: 3,541

Svietlana II - '13 Peugeot 308SW e-HDI 6sp
90 day: 58.1 mpg (US)
Thanks: 1,056
Thanked 629 Times in 396 Posts
Hello T Durden and welcome to EcoModder

That is indeed a simple Kammie, and it appears you got the top angle on the dot at 13-14deg. I'm not sure about the sides, though. The inward angle seems quite steep which may effect the wake. I guess you're not willing to unrivet and rivet on the side of the road while A-B-A testing?

BTW: Those skirts look nice (the shape, not the rust). How long have you been using them? Are they easy to take off/put on?
__________________
e·co·mod·ding: the art of turning vehicles into what they should be

What matters is where you're going, not how fast.

"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell

Piwoslaw's Peugeot 307sw modding thread

  Reply With Quote
Old 02-05-2010, 04:05 PM   #3 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 527 Times in 354 Posts
T Durden -

Welcome to EM! I like it. I measured a 12.8 degree slope. Can you tell me the thickness of the acrylic? If I were you, I would seal any gaps that could allow air to sneak under the kammback. In the last picture, it *appears* that there could be a small hole where the acrylic slopes from the rear hatch "roof" to the rear hatch pillar.

CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Old 02-05-2010, 04:31 PM   #4 (permalink)
That VX guy!
 
TomO's Avatar
 
Join Date: Nov 2007
Location: Mini Soda
Posts: 824

Odie2 - '04 Subaru Impreza WRX Wagon
90 day: 20.5 mpg (US)
Thanks: 74
Thanked 75 Times in 49 Posts
Send a message via AIM to TomO Send a message via Yahoo to TomO
Welcome T Durden, don't start any fights in here

GAffers tape, or even Duct Tape (if you don't mind the residue) would be a quick and cheap way to seal up the edges of that kammback.
__________________

  Reply With Quote
Old 02-05-2010, 04:41 PM   #5 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,218

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)
Thanks: 2,981
Thanked 5,852 Times in 3,033 Posts
I'm curious about those rear fender skirts too - is that corrosion from years of use on your car? Or did they go on that way?
__________________
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 02-05-2010, 05:21 PM   #6 (permalink)
Master EcoModder
 
Join Date: Nov 2009
Location: Leadville, CO
Posts: 509

Maroon Ballon - '98 Chrysler Town & Country LXI
90 day: 26.42 mpg (US)

MaEsTRO - '95 Geo Metro 5spd hatch, 3 cyl
Thanks: 47
Thanked 54 Times in 38 Posts
Looks like a worthwhile experiment.

I like the skirts. Are they easy to remove? Looks like a good pattern.

Are those front caps rusted pizza pans, or just a rust colored material?
  Reply With Quote
Old 02-06-2010, 06:20 AM   #7 (permalink)
recession proof rebel
 
k.civic.f4i's Avatar
 
Join Date: Sep 2009
Location: california
Posts: 129
Thanks: 16
Thanked 11 Times in 4 Posts
im pretty sure its rust bro. rust sucks. nice skirts though
__________________
how to.....
http://ecomodder.com/forum/showthrea...cks-11998.html
http://ecomodder.com/forum/showthrea...how-12301.html

true wealth comes from good health and wise ways
  Reply With Quote
Old 02-06-2010, 07:24 PM   #8 (permalink)
Hi-Tech Redneck
 
Johnny Mullet's Avatar
 
Join Date: May 2008
Location: Ashtabula, Ohio
Posts: 1,436
Thanks: 6
Thanked 42 Times in 35 Posts
Send a message via AIM to Johnny Mullet Send a message via MSN to Johnny Mullet
Welcome to the forum.
__________________

GeoMetroforum.com - got mpg?
  Reply With Quote
Old 02-07-2010, 11:21 AM   #9 (permalink)
EcoModding Lurker
 
Join Date: Oct 2009
Location: Brantford, ON
Posts: 4

The Durd (retired) - '96 Geo Metro
90 day: 53.79 mpg (US)

The Durd II (retired) - '97 Geo Metro
Thanks: 0
Thanked 1 Time in 1 Post
Thanks for the compliments on the skirts! They've been on the car for just a few months. I think I screwed up the painting, not cleaning them well enough before priming. They are easy to remove though, just a few "self tapping" screws holding them on.

The acrylic is about 1/8", 3mm thick. Yeah, doing A-B-A might be a little difficult, haha.
Yes, there are definitely some holes letting air under it, I'll tape 'em up!

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sedan Kammback? KJSatz Aerodynamics 10 09-28-2009 05:58 AM
"Intelligent" Kammback Piwoslaw Aerodynamics 13 09-17-2009 04:21 AM
Non-invasive mounting for kammback wagonman76 Aerodynamics 4 03-24-2009 07:15 PM
Quick and easy licence plate aerodynamic mod :D blackjackel Aerodynamics 7 05-13-2008 08:20 AM



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