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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 10-04-2017, 02:56 PM   #61 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,635

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

MPGiata - '90 Mazda Miata
90 day: 53.78 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: 66.29 mpg (US)
Thanks: 3,388
Thanked 6,199 Times in 3,210 Posts
Quote:
Originally Posted by Old Tele man View Post
Uh, I'd counter, GF = current "trendy" gotta have bling.
I have not yet had any requests from miataforum.com to mass produce any of these mods.

Quote:
Are you producing the bumper line straight down? What will the back edge look like?
Yep, straight down. On the inside, it's coming straight back from the tire. All the plan taper is on the outside edge.

Sort of like much bigger versions of the tapered "pie slices" on the lower bumper areas behind the rear wheels of the 2nd gen Prius, or the VW XL1:





Of course theirs aren't as prominent because their rear bumpers were shaped better to begin with.

Will post more/better Miata pics this evening hopefully.

Attached Thumbnails
Click image for larger version

Name:	112_04_coty_l+2004_toyota_prius+rear_left_side.jpg
Views:	421
Size:	16.6 KB
ID:	22806   Click image for larger version

Name:	2011-volkswagen-xl1-3.jpg
Views:	430
Size:	44.7 KB
ID:	22807  
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now 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
The Following User Says Thank You to MetroMPG For This Useful Post:
freebeard (10-04-2017)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 10-04-2017, 04:57 PM   #62 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 16,570
Thanks: 4,375
Thanked 5,582 Times in 4,445 Posts
I'm contemplating a non-Beetle architecture, and it has some similarities.

My thinking is that the underbody flow wants a flat diverter for minimal downforce, but there should be a bell-mouth to couple to the wake. You see those curved indentations in back bumpers to acclimate the consuming public to the idea.

So, a flat roof and curved outer fences with one or two inner fences. The outer fences can merge into a trailing spat, but I incline toward leaving that off to better shed snow and small mammals.

I want to airfoil the twist-beam rear axle.
  Reply With Quote
Old 10-05-2017, 04:18 PM   #63 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,635

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

MPGiata - '90 Mazda Miata
90 day: 53.78 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: 66.29 mpg (US)
Thanks: 3,388
Thanked 6,199 Times in 3,210 Posts
passenger side CAD

Quote:
Originally Posted by freebeard View Post
I want to airfoil the twist-beam rear axle.
YKYAEMW...

---






Extensive CAD work.


Driver's side next (it's about half done), then I'd like to do coastdown testing next week. Hopefully this hasn't all been for nothing!
Attached Thumbnails
Click image for larger version

Name:	skirt-pass-rear.jpg
Views:	436
Size:	73.0 KB
ID:	22816   Click image for larger version

Name:	skirt-pass-rear-3-4.jpg
Views:	572
Size:	82.4 KB
ID:	22817  
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now 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
The Following 3 Users Say Thank You to MetroMPG For This Useful Post:
Daox (10-05-2017), freebeard (10-05-2017), Gasoline Fumes (10-06-2017)
Old 10-05-2017, 06:56 PM   #64 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 16,570
Thanks: 4,375
Thanked 5,582 Times in 4,445 Posts
It looks good, but I'd remove that flat at the rear and curve the inner wall outward.

Consider Fachsenfeld's 'tearing edges'. Here's an aerohead link.

The top of the bumper and the sides form a box cavity. I'd be thinking about how to best feed underbody air into that. Maybe a serrated bottom edge?

edit: Or something like this?

  Reply With Quote
Old 10-05-2017, 09:40 PM   #65 (permalink)
Master EcoModder
 
Stubby79's Avatar
 
Join Date: Sep 2012
Location: Victoria, BC
Posts: 1,304

Firefly EV - '98 Pontiac Firefly EV
90 day: 107.65 mpg (US)

Little Boy Blue - '05 Toyota Echo
90 day: 33.35 mpg (US)

BlueZ - '19 Nissan 370Z Sport
90 day: 17.19 mpg (US)
Thanks: 43
Thanked 386 Times in 290 Posts
Lightbulb

Quote:
Originally Posted by Old Tele man View Post
Excellent spots (left & right) to put LARGE Flamethrowers!
Fixed that for ya.
  Reply With Quote
Old 10-07-2017, 07:32 PM   #66 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,635

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

MPGiata - '90 Mazda Miata
90 day: 53.78 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: 66.29 mpg (US)
Thanks: 3,388
Thanked 6,199 Times in 3,210 Posts


Both sides done!

Tuft and coastdown testing to come.
Attached Thumbnails
Click image for larger version

Name:	20171007_192726.jpg
Views:	407
Size:	55.1 KB
ID:	22827  
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now 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
The Following 3 Users Say Thank You to MetroMPG For This Useful Post:
freebeard (10-07-2017), Gasoline Fumes (10-07-2017), slowmover (10-07-2017)
Old 10-08-2017, 05:19 PM   #67 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,635

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

MPGiata - '90 Mazda Miata
90 day: 53.78 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: 66.29 mpg (US)
Thanks: 3,388
Thanked 6,199 Times in 3,210 Posts
aesthet...ICK!








Aesthetically questionable, but the air likes it!
Attached Thumbnails
Click image for larger version

Name:	20171008_171129.jpg
Views:	605
Size:	92.0 KB
ID:	22829   Click image for larger version

Name:	20171008_171552.jpg
Views:	1137
Size:	94.4 KB
ID:	22830   Click image for larger version

Name:	20171008_171805.jpg
Views:	618
Size:	64.3 KB
ID:	22831  
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now 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
The Following 2 Users Say Thank You to MetroMPG For This Useful Post:
Daox (10-09-2017), PaleMelanesian (10-09-2017)
Old 10-09-2017, 10:21 AM   #68 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,635

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

MPGiata - '90 Mazda Miata
90 day: 53.78 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: 66.29 mpg (US)
Thanks: 3,388
Thanked 6,199 Times in 3,210 Posts
Logo?

PS: does anybody recognize the round logo in the middle of the rear bumper? The car had a bunch of stickers on it when I got it, but that one needs more persuading to remove.

I struck out trying Google image search with upload.
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now 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 10-09-2017, 11:13 AM   #69 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,635

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

MPGiata - '90 Mazda Miata
90 day: 53.78 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: 66.29 mpg (US)
Thanks: 3,388
Thanked 6,199 Times in 3,210 Posts
tuft test results

From what I saw, flow is attached along the full length of the skirt with minor exceptions:



Once in a while, the last, lowest tufts get a little crazy, but flow never reverses.

Compare to a non-skirted, non-wheel-disc Miata:



Artist-enhanced! Because he didn't put on as many tufts. But view the video, and I don't think you'll disagree with the artwork: There's zero attached flow on the bodywork behind the wheel arch/tire.

Last test: tomorrow may be nice enough to do some coastdown comparisons.
Attached Thumbnails
Click image for larger version

Name:	skirt-tuft-test.jpg
Views:	409
Size:	40.2 KB
ID:	22832   Click image for larger version

Name:	skirt-absent-nb-tuft-test.jpg
Views:	431
Size:	70.6 KB
ID:	22833  
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now 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
The Following 3 Users Say Thank You to MetroMPG For This Useful Post:
COcyclist (10-09-2017), Daox (10-09-2017), Gasoline Fumes (10-09-2017)
Old 10-09-2017, 12:47 PM   #70 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,635

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

MPGiata - '90 Mazda Miata
90 day: 53.78 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: 66.29 mpg (US)
Thanks: 3,388
Thanked 6,199 Times in 3,210 Posts
A little less ugly?


Attached Thumbnails
Click image for larger version

Name:	skirt-painted.jpg
Views:	406
Size:	111.8 KB
ID:	22834  
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now 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
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com