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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 01-29-2018, 07:31 AM   #1 (permalink)
aero guerrilla
 
Piwoslaw's Avatar
 
Join Date: Oct 2008
Location: Warsaw, Poland
Posts: 3,524

Svietlana - '05 Peugeot 307 SW
Diesel
90 day: 54.1 mpg (US)

Theodor - '01 Peugeot 106
90 day: 46.17 mpg (US)
Thanks: 1,035
Thanked 615 Times in 386 Posts
Insulation under the car (to reduce heat gain from pavement)

Would insulating the underside of the chassis help reduce heat gain from the hot pavement? And heat loss in coldest of winter?

Or is this negligible?

__________________
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
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 01-29-2018, 07:48 AM   #2 (permalink)
Master EcoModder
 
Ecky's Avatar
 
Join Date: Dec 2011
Location: Vermont
Posts: 2,641

Gaptooth - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 70.92 mpg (US)

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

Velomobile - '13 Sun Seeker EZ-TAD SX
Last 3: 2142.86 mpg (US)
Thanks: 895
Thanked 1,023 Times in 646 Posts
My guess is that most heat gain/loss will be through the windows, so probably not significant. There's already a layer of sound insulation and carpet over the floor pan.
  Reply With Quote
Old 01-29-2018, 09:35 AM   #3 (permalink)
Master Novice
 
elhigh's Avatar
 
Join Date: Jan 2008
Location: SE USA - East Tennessee
Posts: 2,199

Josie - '87 Toyota Pickup
90 day: 29.48 mpg (US)

Tiptoe - '03 Honda Civic Hybrid
Team Honda
90 day: 46.49 mpg (US)

Felicia - '09 Toyota Prius Base
90 day: 47.91 mpg (US)
Thanks: 376
Thanked 539 Times in 394 Posts
Adding a belly pan is already a good idea; if you have a belly pan down there then carefully applying a layer of foil for a radiant heat reflector could provide the kind of results you're looking for.

Just be careful you don't accidentally insulate the heat of your exhaust system inside the belly pan space.

There are clear or nearly clear window films that are supposed to be really good at reflecting heat back out of the window - clear enough that you can legally apply them to the windshield, which you certainly can't do with tinted films. You can't get them on the consumer market, they have to be applied by certified installers.
__________________




Take it easy
  Reply With Quote
Old 01-29-2018, 10:59 AM   #4 (permalink)
Furry Furfag
 
Baltothewolf's Avatar
 
Join Date: Nov 2013
Location: Apple Valley
Posts: 2,080

Winsight - '00 Honda Insight
90 day: 56.69 mpg (US)

Miaderp - '95 Mazda Miata
90 day: 28.53 mpg (US)
Thanks: 67
Thanked 387 Times in 297 Posts
Quote:
Originally Posted by Ecky View Post
My guess is that most heat gain/loss will be through the windows, so probably not significant. There's already a layer of sound insulation and carpet over the floor pan.
As a Miata owner, I disagree.

OK but really though, if it's not a modern car then some lightweight heat reflecting tape can do wonders. On a miata it can lower transmission tunnel temps by 30-50F and the floorboard right above the exhaust by a significant amount. When I'm cruising on the freeway in my Miata I can feel the radiant heat coming through the carpet.
__________________

  Reply With Quote
Old 01-29-2018, 05:29 PM   #5 (permalink)
EcoModding flying lizard
 
Daschicken's Avatar
 
Join Date: May 2012
Location: Georgia
Posts: 508

Cibbie - '88 Honda CBR 250R
Motorcycle
90 day: 53.91 mpg (US)

Rarity - '06 Honda Accord EX V6
Team Honda
90 day: 41.26 mpg (US)

Baby viff - '86 Honda VFR 400R
Motorcycle
90 day: 48.31 mpg (US)
Thanks: 369
Thanked 157 Times in 105 Posts
What, you can't put up with the heat? I use my A/C more in the winter than in the summer, thanks to windshield defrosting. Okay, I don't know how hot it gets where you live, and I drive a white car with white interior, so my car doesn't get too hot.

Quote:
Originally Posted by Baltothewolf View Post
As a Miata owner, I disagree.

OK but really though, if it's not a modern car then some lightweight heat reflecting tape can do wonders. On a miata it can lower transmission tunnel temps by 30-50F and the floorboard right above the exhaust by a significant amount. When I'm cruising on the freeway in my Miata I can feel the radiant heat coming through the carpet.
The miata lets in a ridiculous amount of heat through the transmission tunnel. Great in the winter, terrible all other times. I have never driven any other RWD car that radiates as much heat from that tunnel than the miata. Balto, you going to FWA 2018? I have been converted.
__________________
-Kaze o tatakaimasen-

Add yourself to the Ecomodder user map! As of 11/30/16 there are only 50 people on it!

132(Includes repeats...grr...) People as of 7/7/2018 Keep it up!

http://ecomodder.com/forum/showthrea...rmap-8247.html


Best trip in v6: 50.4
Best tank in CBR: 60.5
Best tank in VFR: 55.3

Quote:
Originally Posted by MetroMPG View Post
You can lead a fashion-conscious horse to unusual-looking water...

  Reply With Quote
Old 01-29-2018, 06:56 PM   #6 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 6,541
Thanks: 0
Thanked 646 Times in 574 Posts
This thread reminds me the day an Opel Corsa that my dad used to have when I was a teen had an ignition coil failure, and the catalyst overheated. I could feel the excessive heat irradiating through the floor.

Anyway, I'm totally favorable to adding some insulation to the floorpan of your car. I usually see some folks using those aluminium-faced reflective foils under the floorpan, even though some actually do it in order to patch rusty spots (or the holes drilled to bolt CNG tank subframes when they're not desired anymore)
  Reply With Quote
Old 01-30-2018, 03:56 AM   #7 (permalink)
EV convert
 
oil pan 4's Avatar
 
Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 5,817

Sub - '84 Chevy Diesel Suburban C10
SUV
90 day: 19.5 mpg (US)

camaro - '85 Chevy Camaro Z28

Riot - '03 Kia Rio POS
Team Hyundai
90 day: 30.21 mpg (US)

Bug - '01 VW Beetle GLSturbo
90 day: 26.43 mpg (US)

Sub2500 - '86 GMC Suburban C2500
90 day: 11.95 mpg (US)

Shocker - '11 Nissan Leaf SL
SUV
90 day: 136.71 mpg (US)
Thanks: 133
Thanked 1,460 Times in 1,086 Posts
Put the insulation on the inside.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white 240v evse mod, trailer hitch, new batt as of 2014.
  Reply With Quote
Old 01-30-2018, 04:04 AM   #8 (permalink)
Furry Furfag
 
Baltothewolf's Avatar
 
Join Date: Nov 2013
Location: Apple Valley
Posts: 2,080

Winsight - '00 Honda Insight
90 day: 56.69 mpg (US)

Miaderp - '95 Mazda Miata
90 day: 28.53 mpg (US)
Thanks: 67
Thanked 387 Times in 297 Posts
Quote:
Originally Posted by Daschicken View Post
The miata lets in a ridiculous amount of heat through the transmission tunnel. Great in the winter, terrible all other times. I have never driven any other RWD car that radiates as much heat from that tunnel than the miata. Balto, you going to FWA 2018? I have been converted.
Nah I'm only doing FC and BLFC this year (already did FC, was a blast).

You got telegram?
__________________

  Reply With Quote
Old 01-30-2018, 01:15 PM   #9 (permalink)
ASV
weirdo
 
ASV's Avatar
 
Join Date: Oct 2008
Location: PHX AZ
Posts: 87
Thanks: 6
Thanked 9 Times in 8 Posts
thermal mas is better off inside the insulation wether your dealing with exes heat or insufficient heat. So put the insulation on the outside
R-Tech foam boards seem to hold up to weather well if not exposed to UV
and can be gotten with a reflective aluminum skin
  Reply With Quote
Old 01-31-2018, 02:15 AM   #10 (permalink)
EcoModding Lurker
 
Join Date: Jan 2018
Location: Ga
Posts: 25
Thanks: 0
Thanked 2 Times in 2 Posts
I heard good things about dynaliner. A cheap alternative is Frost King duct insulation.

  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com