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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 03-14-2014, 05:13 PM   #1 (permalink)
Master EcoModder
 
Ecky's Avatar
 
Join Date: Dec 2011
Location: Vermont
Posts: 3,463

Gaptooth (retired) - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 54.26 mpg (US)

Such Fit - '07 Honda Fit Sport
90 day: 41.27 mpg (US)

Connect - '15 Ford Transit Connect XL
90 day: 23.61 mpg (US)

K-sight - '00 Honda K-sight
90 day: 41.38 mpg (US)
Thanks: 1,277
Thanked 1,409 Times in 898 Posts
Honda Del Sol partial bellypan

Last week, I posted about my accidental boat tail in Success Stories. Shortly after I started on my aeromods, and gave the first of them a few days' testing to make sure they wouldn't catch fire before posting. Although I've had some warping around the exhaust, it doesn't look like it's going to spontaneously combust on me.

Materials:

2x 6'x3' coroplast sheets from Home Depot - $14 each
2 cans flame retardant insulating foam spray - $5 each
7' aluminum "strap", ~$12
2x hose clamps
2 self-tapping screws + washers

In retrospect, I probably should've used exhaust wrap, and might yet if the coroplast deforms too much around it.

Underbody pictures:







Because the previous owner replaced the exhaust with a large diameter straight-pipe, the exhaust hangs a bit lower than the rest of the undercarriage. I had to find some way to allow the coroplast to rest against it without bursting into flames.

I had the idea of using expanding fire-retardant insulating foam spray, and wedged some spacers between the coroplast and the exhaust to hold them apart while it expanded and dried.





Fearing the aluminum strap wouldn't be strong enough to prevent the wind from ripping off my partial-pan, I also filled the gap at the leading edge with foam.



From behind:



7 days, mixed city and highway driving, and so far so good. Tested to hold at up to 100MPH.

The data I collected suggests that my gains are about 6% at 65-70MPH, which is just over a third of the gain I got from my "boat tail", but it's something.

Earlier today I took some of my scraps and made a partial grill block (to be remade more aesthetically later if it works) and covered a small strip in the front under the transmission. At some point I'll probably buy another sheet of 6'3 and just do the entire front, with one cutout to allow for easy oil changes and a second to keep space around the exhaust.



After seeing my finished product, my father scratched his head and asked, "how much longer are you planning on keeping that car? You've already got 220,000 miles on it", to which I replied, "Till it falls apart".


Last edited by Ecky; 03-14-2014 at 05:21 PM..
  Reply With Quote
The Following User Says Thank You to Ecky For This Useful Post:
aerohead (03-14-2014)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 03-14-2014, 07:02 PM   #2 (permalink)
EcoModding Lurker
 
Join Date: Mar 2014
Location: Cincity, Ohio
Posts: 92
Thanks: 29
Thanked 25 Times in 20 Posts
I suggest removing it all and double wrapping the exhaust piping, This will keep heat in the exhaust which promotes better EGV as well as prevent the gas in the tank from boiling.

Some reading, where I started getting ideas in 1997, Hondata B16 CRX

Landspeed information
  Reply With Quote
The Following User Says Thank You to Mista Bone For This Useful Post:
Ecky (03-14-2014)
Old 03-14-2014, 07:08 PM   #3 (permalink)
Master EcoModder
 
jedi_sol's Avatar
 
Join Date: Mar 2009
Location: Tustin, CA
Posts: 929

2013 STi *SOLD* - '13 Subaru Impreza WRX STi
Subaru
Sports Cars
Team Turbocharged!
90 day: 26.59 mpg (US)

1996 Geo Metro *RETIRED from Ecomodding* - '96 Geo Metro Base
90 day: 58.68 mpg (US)
Thanks: 368
Thanked 378 Times in 236 Posts
Of course the undertray and front grill block work! check out my old del sol





This is the old girl in her heyday (averaged 45mpg...best tank ever 49.1mpg) with an Acura GSR motor.
__________________







See the rest of the Sti project log:
http://ecomodder.com/forum/showthrea...log-26612.html
  Reply With Quote
The Following 3 Users Say Thank You to jedi_sol For This Useful Post:
aerohead (03-15-2014), Ecky (03-14-2014), mikeyjd (03-14-2014)
Old 03-14-2014, 07:22 PM   #4 (permalink)
EcoModding Lurker
 
Join Date: Mar 2014
Location: Cincity, Ohio
Posts: 92
Thanks: 29
Thanked 25 Times in 20 Posts
That grill opening looks a little refined compared to my old setup, same color car though
  Reply With Quote
Old 03-14-2014, 07:49 PM   #5 (permalink)
Master EcoModder
 
jedi_sol's Avatar
 
Join Date: Mar 2009
Location: Tustin, CA
Posts: 929

2013 STi *SOLD* - '13 Subaru Impreza WRX STi
Subaru
Sports Cars
Team Turbocharged!
90 day: 26.59 mpg (US)

1996 Geo Metro *RETIRED from Ecomodding* - '96 Geo Metro Base
90 day: 58.68 mpg (US)
Thanks: 368
Thanked 378 Times in 236 Posts
i noticed the b18b swap
__________________







See the rest of the Sti project log:
http://ecomodder.com/forum/showthrea...log-26612.html
  Reply With Quote
Old 03-14-2014, 09:17 PM   #6 (permalink)
Master EcoModder
 
Ecky's Avatar
 
Join Date: Dec 2011
Location: Vermont
Posts: 3,463

Gaptooth (retired) - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 54.26 mpg (US)

Such Fit - '07 Honda Fit Sport
90 day: 41.27 mpg (US)

Connect - '15 Ford Transit Connect XL
90 day: 23.61 mpg (US)

K-sight - '00 Honda K-sight
90 day: 41.38 mpg (US)
Thanks: 1,277
Thanked 1,409 Times in 898 Posts
How does this wrap look?

http://www.amazon.com/Black-Racing-Fiberglass-Exhaust-Header/dp/B00DP9MXZS/ref=sr_1_56?s=automotive&ie=UTF8&qid=1394845082&sr =1-56&keywords=exhaust+wrap

Given a 9.5" circumference (3" pipe) and a needed run of ~50" if I stop at the U bend before the muffler, or ~62" if I include it, and assuming I overlap so that it's double wrapped, one 50 foot roll ought to do it, or two if I want to do the entire length of the pipe. Will 1000F rating be fine all the way up to the motor, or would it be wise to get some 2000 rated wrap for the header?

EDIT: @jedi_sol, where did you put your jack to lift your 'Sol up enough to get the jack stand under it in the back?

Last edited by Ecky; 03-14-2014 at 09:28 PM..
  Reply With Quote
Old 03-14-2014, 10:11 PM   #7 (permalink)
Master EcoModder
 
jedi_sol's Avatar
 
Join Date: Mar 2009
Location: Tustin, CA
Posts: 929

2013 STi *SOLD* - '13 Subaru Impreza WRX STi
Subaru
Sports Cars
Team Turbocharged!
90 day: 26.59 mpg (US)

1996 Geo Metro *RETIRED from Ecomodding* - '96 Geo Metro Base
90 day: 58.68 mpg (US)
Thanks: 368
Thanked 378 Times in 236 Posts
I don't.recall exactly, it was so long ago. Based on my picture, I must have jacked up one side, place a jack stand there. Moved the jack to the other side, jacked it up. This made the rear bumper high enough to slide the jack stand under the rear tow hook.

Edit: I forgot, your car is the si vtec model. I'm not used to seeing del sold in that trim, so I just assumed dual cams in a del sol is an engine swap.
__________________







See the rest of the Sti project log:
http://ecomodder.com/forum/showthrea...log-26612.html
  Reply With Quote
Old 03-14-2014, 10:44 PM   #8 (permalink)
Master EcoModder
 
Ecky's Avatar
 
Join Date: Dec 2011
Location: Vermont
Posts: 3,463

Gaptooth (retired) - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 54.26 mpg (US)

Such Fit - '07 Honda Fit Sport
90 day: 41.27 mpg (US)

Connect - '15 Ford Transit Connect XL
90 day: 23.61 mpg (US)

K-sight - '00 Honda K-sight
90 day: 41.38 mpg (US)
Thanks: 1,277
Thanked 1,409 Times in 898 Posts
You called it right though. I have an LS motor mated to the stock Y21 tranny, which IMO, is possibly the worst combination for fuel economy, though it's pretty peppy around town.

EDIT: 100' of 2" exhaust wrap on the way.


Last edited by Ecky; 03-16-2014 at 12:19 PM..
  Reply With Quote
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