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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 05-07-2012, 08:22 AM   #1 (permalink)
Too many cars
 
Gasoline Fumes's Avatar
 
Join Date: Oct 2009
Location: New York State
Posts: 1,573

CRXFi - '88 Honda CRX XFi

Insight 256 - '00 Honda Insight
Team Honda
Gen-1 Insights

Insight 5342 (no IMA) - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 66.3 mpg (US)
Thanks: 1,329
Thanked 786 Times in 468 Posts
I made some side skirts

Good or bad? I haven't attempted any testing yet. They are open on the bottom and wrap around on both ends. This car has plastic rocker panel covers, I screwed the skirts to them. They're about 6" off the ground.

Made from white coroplast painted black.

I also added ecomodder.com decals. Those alone should be worth a couple of MPG.




__________________
2000 Honda Insight
2000 Honda Insight
2000 Honda Insight
2006 Honda Insight (parts car)
1988 Honda CRXFi
1994 Geo Metro

  Reply With Quote
The Following 4 Users Say Thank You to Gasoline Fumes For This Useful Post:
aerohead (05-10-2012), Christ (05-14-2012), mikeyjd (09-25-2013), Sven7 (05-09-2012)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 05-07-2012, 09:28 AM   #2 (permalink)
Master EcoModder
 
skyking's Avatar
 
Join Date: Apr 2011
Location: Tacoma WA
Posts: 1,399

Woody - '96 Dodge Ram 2500 SLT
Team Cummins
90 day: 23.82 mpg (US)

Avion and Woody - '96 Dodge/Avion Ram 2500/5th wheel combo
90 day: 15.1 mpg (US)

TD eye eye eye - '03 Volkswagen Beetle GLS
90 day: 49.05 mpg (US)

Mule - '07 Dodge Ram 3500 ST
Thanks: 743
Thanked 528 Times in 344 Posts
that looks "right" on there. Good work.
__________________




2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle

currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears
  Reply With Quote
The Following User Says Thank You to skyking For This Useful Post:
Gasoline Fumes (05-07-2012)
Old 05-07-2012, 12:07 PM   #3 (permalink)
EcoModding Lurker
 
Join Date: Jun 2008
Location: California
Posts: 23

InsertUniqueName - '07 Toyota Yaris sport

SaturnMPGbeater - '02 Chevy cobalt
Team Saturn
90 day: 47.82 mpg (US)
Thanks: 1
Thanked 2 Times in 2 Posts
Is there any kind of suggested length of side skirts? Or the more the better? Planning on doing this soon with some lawn edging.
  Reply With Quote
Old 05-07-2012, 12:36 PM   #4 (permalink)
Too many cars
 
Gasoline Fumes's Avatar
 
Join Date: Oct 2009
Location: New York State
Posts: 1,573

CRXFi - '88 Honda CRX XFi

Insight 256 - '00 Honda Insight
Team Honda
Gen-1 Insights

Insight 5342 (no IMA) - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 66.3 mpg (US)
Thanks: 1,329
Thanked 786 Times in 468 Posts
Quote:
Originally Posted by jousai7 View Post
Is there any kind of suggested length of side skirts? Or the more the better? Planning on doing this soon with some lawn edging.
Mine are 7" tall. I don't know what's ideal, I just don't think I can get away with them being any lower. I'm concerned about them scraping on speed bumps at their current size. My front air dam scrapes and it's about the same height. But it's a lot tougher than coroplast.
__________________
2000 Honda Insight
2000 Honda Insight
2000 Honda Insight
2006 Honda Insight (parts car)
1988 Honda CRXFi
1994 Geo Metro

  Reply With Quote
Old 05-07-2012, 01:59 PM   #5 (permalink)
Master EcoModder
 
basjoos's Avatar
 
Join Date: Dec 2007
Location: Upstate SC
Posts: 1,088

Aerocivic - '92 Honda Civic CX
Last 3: 70.54 mpg (US)

AerocivicLB - '92 Honda Civic CX
Team Honda
90 day: 55.14 mpg (US)

Camryglide - '20 Toyota Camry hybrid LE
90 day: 62.77 mpg (US)
Thanks: 16
Thanked 676 Times in 302 Posts
The coroplast double side skirts on my car are designed to flex independently of each other when they encounter a speed bump or high curb and it doesn't damage them a bit when they do scrape. When I designed and installed them, I deliberately made them too long and painted them black. After driving around for a few days, I could see where the paint was abraded off by pavement encounters. Those wear marks served as a guide as I trimmed them down to where they only made occasional contact with the road. Now 6 years and 180,000 miles later, they show no abrasion loss from the occasional scrapes accumulated along the way.

You'll need to keep a coat of paint on any coroplast that is exposed to direct sunlight, otherwise the sunlight's UV will cause the coroplast to become brittle and crack within 2 to 3 years.
__________________
aerocivic.com

Last edited by basjoos; 05-07-2012 at 02:06 PM..
  Reply With Quote
The Following 9 Users Say Thank You to basjoos For This Useful Post:
aerohead (05-10-2012), California98Civic (05-11-2012), cfg83 (05-07-2012), Christ (05-14-2012), Gasoline Fumes (05-07-2012), Rokeby (05-08-2012), WilliamYH09 (03-11-2014), wyatt (05-09-2012), Xist (04-23-2018)
Old 05-07-2012, 02:12 PM   #6 (permalink)
Master EcoModder
 
Big Dave's Avatar
 
Join Date: Jan 2008
Location: Steppes of Central Indiana
Posts: 1,319

The Red Baron - '00 Ford F-350 XLT
90 day: 27.99 mpg (US)

Impala Phase Zero - '96 Chevrolet Impala SS
90 day: 21.03 mpg (US)
Thanks: 0
Thanked 186 Times in 127 Posts
A while back I did this on my truck. Instead of coroplast, I used 3/8" ripstop rubber conveyor belting. Made both an air dam and side skirts. With the conveyor belting i didn't have to sweat road debris but the side skirts made jacking the truck up for service a royal pain, so i ttok them off. the loss of MPG was minimal.

I did modify my air dam to be 6" above grade, but it's still there.

Attach the front edge of the side skirt REALLY well.
__________________
2000 Ford F-350 SC 4x2 6 Speed Manual
4" Slam
3.08:1 gears and Gear Vendor Overdrive
Rubber Conveyor Belt Air Dam
  Reply With Quote
The Following 3 Users Say Thank You to Big Dave For This Useful Post:
aerohead (05-10-2012), Gasoline Fumes (05-07-2012), WilliamYH09 (03-11-2014)
Old 05-07-2012, 05:11 PM   #7 (permalink)
Too many cars
 
Gasoline Fumes's Avatar
 
Join Date: Oct 2009
Location: New York State
Posts: 1,573

CRXFi - '88 Honda CRX XFi

Insight 256 - '00 Honda Insight
Team Honda
Gen-1 Insights

Insight 5342 (no IMA) - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 66.3 mpg (US)
Thanks: 1,329
Thanked 786 Times in 468 Posts
Quote:
Originally Posted by basjoos View Post
The coroplast double side skirts on my car are designed to flex independently of each other when they encounter a speed bump or high curb and it doesn't damage them a bit when they do scrape. When I designed and installed them, I deliberately made them too long and painted them black. After driving around for a few days, I could see where the paint was abraded off by pavement encounters. Those wear marks served as a guide as I trimmed them down to where they only made occasional contact with the road. Now 6 years and 180,000 miles later, they show no abrasion loss from the occasional scrapes accumulated along the way.

You'll need to keep a coat of paint on any coroplast that is exposed to direct sunlight, otherwise the sunlight's UV will cause the coroplast to become brittle and crack within 2 to 3 years.
Thanks. There's really just one speed bump I'm concerned about. I actually parked over it and measured the clearance before making the skirts. I think it should just barely clear if I go over it really slow. I will stop over it and see how close the skirts are.

I never even thought about sun damage, I just didn't want 7" wide white bands under the car.
__________________
2000 Honda Insight
2000 Honda Insight
2000 Honda Insight
2006 Honda Insight (parts car)
1988 Honda CRXFi
1994 Geo Metro

  Reply With Quote
Old 05-07-2012, 05:21 PM   #8 (permalink)
Too many cars
 
Gasoline Fumes's Avatar
 
Join Date: Oct 2009
Location: New York State
Posts: 1,573

CRXFi - '88 Honda CRX XFi

Insight 256 - '00 Honda Insight
Team Honda
Gen-1 Insights

Insight 5342 (no IMA) - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 66.3 mpg (US)
Thanks: 1,329
Thanked 786 Times in 468 Posts
Quote:
Originally Posted by Big Dave View Post
A while back I did this on my truck. Instead of coroplast, I used 3/8" ripstop rubber conveyor belting. Made both an air dam and side skirts. With the conveyor belting i didn't have to sweat road debris but the side skirts made jacking the truck up for service a royal pain, so i ttok them off. the loss of MPG was minimal.

I did modify my air dam to be 6" above grade, but it's still there.

Attach the front edge of the side skirt REALLY well.
The air dam is a little annoying for service, I can't use ramps and it's hard to see the front jacking point. I don't jack it up from the side, but I should check if I can still get the scissor jack in there if I have a flat tire. I'm pretty sure I can with 6" of clearance. So far, the biggest issue is that I keep kicking them. Getting in and out of the car and even just getting something out of the car.

I keep looking at the bulk conveyor belting at Tractor Supply, but the coroplast was free.
__________________
2000 Honda Insight
2000 Honda Insight
2000 Honda Insight
2006 Honda Insight (parts car)
1988 Honda CRXFi
1994 Geo Metro

  Reply With Quote
The Following User Says Thank You to Gasoline Fumes For This Useful Post:
wagonef8 (05-08-2012)
Old 05-08-2012, 10:59 AM   #9 (permalink)
Master EcoModder
 
Big Dave's Avatar
 
Join Date: Jan 2008
Location: Steppes of Central Indiana
Posts: 1,319

The Red Baron - '00 Ford F-350 XLT
90 day: 27.99 mpg (US)

Impala Phase Zero - '96 Chevrolet Impala SS
90 day: 21.03 mpg (US)
Thanks: 0
Thanked 186 Times in 127 Posts
Problem is that 6" clearance above grade is about as you can have and expect any effectiveness.
__________________
2000 Ford F-350 SC 4x2 6 Speed Manual
4" Slam
3.08:1 gears and Gear Vendor Overdrive
Rubber Conveyor Belt Air Dam
  Reply With Quote
Old 05-08-2012, 11:22 AM   #10 (permalink)
EcoModding Lurker
 
Join Date: Apr 2012
Location: utah
Posts: 79

Del Slow - '94 Honda Del Sol Vx
90 day: 42.31 mpg (US)
Thanks: 2
Thanked 17 Times in 13 Posts
Why not just lower the car

  Reply With Quote
Reply  Post New Thread


Thread Tools




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