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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 12-20-2018, 02:52 AM   #1 (permalink)
aero enthusiast
 
Join Date: Jan 2015
Location: Saskatchewan, Canada
Posts: 90

Blue beauty - '02 Honda Civic VX
Thanks: 154
Thanked 65 Times in 39 Posts
02 Civic underbody panel

Hi all. I am attempting to do an underbody panel (ubp) on my civic. I have been commuting to work with this 4 door sedan for 15 weeks now, about 140km return each day, divided highway. Through this job I have access to a lift in town here, after hours. Have been doing oil changes on it, super easy!
Was talking to a friend about doing an ubp on it and hes like" I have the perfect piece for ya" i was doubtful, but he did! It's just coroplast but it's a long wide piece off his camper about 5' by 13'.
So it's a big task and a little bit overwhelming, so the first night I just wanted to measure and cut the piece to size.
I snapped a centerline on the plastic and measured everything from the front and center. Anyway in couple hours had the panel cut out and roughly on the car. Very exciting!
Then take it down and to the carwash.

Anyone know why my photos are being flipped? Thanks




Attached Thumbnails
Click image for larger version

Name:	20181211_230147.jpg
Views:	108
Size:	87.3 KB
ID:	25277   Click image for larger version

Name:	20181211_232043.jpg
Views:	108
Size:	76.7 KB
ID:	25278  

Last edited by rumdog; 12-20-2018 at 02:56 AM.. Reason: Rotated pics
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 12-20-2018, 09:17 AM   #2 (permalink)
Making Ecomods a G thing
 
Join Date: Jan 2011
Location: Illinois
Posts: 635

Angie - '08 Infiniti G35 X
90 day: 21.91 mpg (US)
Thanks: 33
Thanked 65 Times in 50 Posts
Be careful of the exhaust piping, I'd imagine the coroplast wouldn't get along with it too well. As far as how to counter that problem, you may be able to get away with putting some sheet aluminum on the coroplast where it's close to the pipe, but I can't say for sure.
__________________

  Reply With Quote
The Following User Says Thank You to Joenavy85 For This Useful Post:
rumdog (12-20-2018)
Old 12-20-2018, 11:51 AM   #3 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 3,036
Thanks: 3
Thanked 1,917 Times in 1,353 Posts
Quote:
Originally Posted by Joenavy85 View Post
Be careful of the exhaust piping, I'd imagine the coroplast wouldn't get along with it too well. As far as how to counter that problem, you may be able to get away with putting some sheet aluminum on the coroplast where it's close to the pipe, but I can't say for sure.
Yea, people have talked about using metal screen in that area, don't know if it was done though.

A how-to step by step
Belly pan
https://ecomodder.com/wiki/Belly_pan

Quote:
The material used around the exhaust should be metal, coroplast will melt and deform.

https://ecomodder.com/forum/showthre...pan-21419.html
Quote:
Originally Posted by skyking View Post
any pressure gradient at all will push on through a screen like that. It is not just a flow lengthwise, there are differences in pressure under the car. I'd stick to screen only where you had to. In my case, I have a lot of cooling air to deal with so I just left a window under the muffler.
__________________
George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
  Reply With Quote
The Following User Says Thank You to kach22i For This Useful Post:
rumdog (12-20-2018)
Old 12-21-2018, 07:00 PM   #4 (permalink)
aero enthusiast
 
Join Date: Jan 2015
Location: Saskatchewan, Canada
Posts: 90

Blue beauty - '02 Honda Civic VX
Thanks: 154
Thanked 65 Times in 39 Posts
exhaust near panel

Great picture Kach22i, looks like a solid build.
yea I am aware of the hot exhaust and plan to either use metal between the exhaust and the coroplast, or metal in place of the coroplast. I had forgotten about the use of screen also.
My trouble is the exhaust is the lowest element in the central area, so im leaning towards metal in place of the coroplast in those zones.
I had the civic back on the hoist couple days ago, planning how and where to fix the panel on there... so I can prebuild the reinforcing structure. at the same time I measured the location of the exhaust, and tried to picture the shape of the finished panel - side to side and the rear end curvature/ diffuser.
otherwise its fairly flat.
I also chucked on a lower grill block for the winter, as I reside in Sask, Canada, and took the panel to the carwash to clean er up.
I find that sometimes the fastest way to make a complicated part/thing is to jump in the deep end and start building it... wing it. rather than overdesigning it. helps when the material is free! no stress to get it perfect the first time.
Attached Thumbnails
Click image for larger version

Name:	20181213_234527.jpg
Views:	23
Size:	53.9 KB
ID:	25286   Click image for larger version

Name:	20181212_203303.jpg
Views:	24
Size:	57.6 KB
ID:	25287   Click image for larger version

Name:	20181211_211805.jpg
Views:	21
Size:	68.0 KB
ID:	25288   Click image for larger version

Name:	20181213_234439.jpg
Views:	23
Size:	60.8 KB
ID:	25289  
  Reply With Quote
Old 12-21-2018, 07:33 PM   #5 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 3,036
Thanks: 3
Thanked 1,917 Times in 1,353 Posts
Quote:
Originally Posted by rumdog View Post
I had the civic back on the hoist couple days ago, planning how and where to fix the panel on there... ..........
I don't recall the details, but someone in the forum at one time had a car that didn't required any new substructure for the belly pan.

It was like the manufacture designed the car to have a belly pan but it was dropped or never offered as a option, probably for costs/marketing reasons.
__________________
George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
  Reply With Quote
Old 12-30-2018, 11:34 PM   #6 (permalink)
Aero Wannabe
 
COcyclist's Avatar
 
Join Date: Dec 2007
Location: NW Colo
Posts: 557

TDi - '04 VW Golf
TEAM VW AUDI Group
90 day: 54.87 mpg (US)
Thanks: 369
Thanked 121 Times in 96 Posts
Check out my albums. On my Golf I was able to screw into plastic drain plugs and a plastic fairing around the gas tank without drilling holes into metal.
__________________
60 mpg hwy highest, 55+mpg lifetime
TDi=fast frugal fun
make NOx not Carbon


"I worked on the wiring to see if I could get the alternator to charge. The stud was loose and I accidentally let the white smoke out of the box... Alternators, among other things, run on white smoke. Once you let the white smoke out they no longer work!" planejob

Last edited by COcyclist; 12-30-2018 at 11:41 PM..
  Reply With Quote
The Following 2 Users Say Thank You to COcyclist For This Useful Post:
BamZipPow (01-02-2019), rumdog (01-01-2019)
Old 01-02-2019, 09:30 AM   #7 (permalink)
Master Ecomadman
 
arcosine's Avatar
 
Join Date: Nov 2010
Location: Chicago area
Posts: 1,083

sc1 - '98 saturn sc1
Team Saturn
90 day: 43.17 mpg (US)

Airplane Bike - '11 home built Carp line Tour

rans - '97 rans tailwind

tractor - '66 International Cub cadet 129

2002 Space Odyssey - '02 Honda Odyssey EX-L
90 day: 28.25 mpg (US)

red bug - '00 VW beetle TDI

big tractor - '66 ford 3400

red vw - '00 VW new beetle TDI
90 day: 58.42 mpg (US)
Thanks: 16
Thanked 278 Times in 189 Posts
Hi,

When I did my Saturn, I found on a hot summer day that the gas tank was over pressurized. Seems a lot of hot air, from the exhaust and radiator, is trapped. The gas tank was hot! I added some vents near the tank and that solved it. The interior floor was till warm, though and made for an uncomfortable car in summer. Coroplast melted near the converter, I put a piece of aluminum flashing there in between to space it away..

__________________
- Tony

  Reply With Quote
The Following User Says Thank You to arcosine For This Useful Post:
rumdog (01-02-2019)
Reply  Post New Thread


Thread Tools




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