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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-19-2008, 01:35 AM   #1 (permalink)
EcoMod Wannabe
 
Sean T.'s Avatar
 
Join Date: Apr 2008
Location: Lake Orion, MI
Posts: 448

Taurusaurus Rex - '97 Ford Taurus GL (Sedan)
90 day: 19.39 mpg (US)

Blue Wagon - '00 Ford Taurus Wagon SE Comfort
90 day: 19.61 mpg (US)
Thanks: 6
Thanked 16 Times in 9 Posts
Hood blanket... literally? (engine compartment thermal insulation)

I know that most hoods have a "blanket" under them to insulate the engine compartment... I plan on getting a second one just to beef up the insulation.

I have been thinking... would it be worth it to get a large blanket or quilt and bungee it to the hood of the car when I run into the store or something, to keep the car warm if I am going to be more than 10 minutes? Or even to leave on my car while I am in class...

The theory seems to be good, but practicality might be difficult because if it snows, then I am stuck with a snow covered blanket to clean off and fold back into the trunk...

Anybody have any comments or thoughts???

__________________
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-19-2008, 02:12 AM   #2 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
Not worth it, honestly.

But, in lieu of cleaning off the blanky, just leave it strapped on there lol.

Cool thing about lots of snow buildup on your car - opportunity to see how your cars shape affects airflow, and what shapes you should attempt to achieve when going for aero mods. Don't do this on the highway... FTA says its' illegal now. So does NHTSA.

But honestly, you don't actually lose enough heat through your hood while sitting to worry about anything, it will become more hassle than it's worth. If you're really worried about it, try a one time thing: Aluminum foil and roofing felt.

Remove the "blanky" from under the hood of your car, apply roofing felt en gappe (in the gaps) between the webbing. Make sure to cut the pieces to fit perfectly, and put them in place with some temp-resistant adhesive. Then, take alum foil, or if you're feeling really expensive, get some of that stuff they make balloons from...

Use thin contact adhesive (heat resistant) and glue it to the hood's blanky before pinning it back up in place.

Principle: We all know heat rises. The roofing felt further insulates the hood, the foil is reflective, so it will reflect the heat back toward the engine.
__________________
"ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Old 11-19-2008, 02:13 AM   #3 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
Balloon material == MYLAR.

Heat suits are made from it, as well as solar blankys.
__________________
"ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Old 11-19-2008, 10:06 AM   #4 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,020

CM400E - '81 Honda CM400E
90 day: 58.68 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,339
Thanked 2,417 Times in 1,462 Posts
Underhood 'insulation' is more so there for sound deadening reasons than heat reasons.
__________________
Current project: Adding regenerative braking to the Mirage
  Reply With Quote
Old 11-19-2008, 10:10 AM   #5 (permalink)
Master EcoModder
 
Funny's Avatar
 
Join Date: Apr 2008
Location: Massachusetts
Posts: 408

Eco-Fit - '13 Honda Fit Base
90 day: 37.06 mpg (US)
Thanks: 29
Thanked 18 Times in 18 Posts
mmm...I could have used a nice warm blanky this morning...it was 17 degrees F where I was this morning at 6am... BRRR
__________________
American by right
Ecomodder by choice
Hypermiler by necessity

  Reply With Quote
Old 11-19-2008, 01:44 PM   #6 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
Quote:
Originally Posted by Daox View Post
Underhood 'insulation' is more so there for sound deadening reasons than heat reasons.
Why does it matter what it's there for, when we all know what it actually accomplishes?

Sure, they put it there so people wouldn't be offended by engine noise... but insulation of any kind will retain heat, and you don't think they designed part of the engine management system around that extra heat?
__________________
"ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Old 11-19-2008, 03:05 PM   #7 (permalink)
MechE
 
Join Date: Dec 2007
Location: Bay Area
Posts: 1,151

The Miata - '01 Mazda MX-5 Miata
Thanks: 0
Thanked 20 Times in 17 Posts
Quote:
Originally Posted by Christ View Post
Why does it matter what it's there for, when we all know what it actually accomplishes?

Sure, they put it there so people wouldn't be offended by engine noise... but insulation of any kind will retain heat, and you don't think they designed part of the engine management system around that extra heat?
I'm not convinced that it will be beneficial enough to be measurable.... My house has a fair bit of insulation - but it will get cold quickly with the windows open. Unless the engine bay is fairly sealed, it's going to be drafty in there :/

I think you're fighting natural convection more so than conduction through the hood. Maybe the reflective barrier will be useful for radiation losses.....

It's worth testing methinks Throw a temperature probe in there and log the temperature every 15 minutes or so.... Add the blanket, then do the same If everything is right, you should get two logarithmic plots. I used to have a $15 meat probe thermometer used for such testing, alas, it broke :/
__________________
Cars have not created a new problem. They merely made more urgent the necessity to solve existing ones.
  Reply With Quote
Old 11-19-2008, 04:39 PM   #8 (permalink)
EcoModding Apprentice
 
dichotomous's Avatar
 
Join Date: Nov 2008
Location: vermont
Posts: 142

CivySi - '03 honda civic SI
90 day: 31.99 mpg (US)
Thanks: 0
Thanked 1 Time in 1 Post
the 10-30mi you are in a store will not cool an engine enough to where it would need to heat back up to be efficient. engine blocks stay warm for hours. heck, my open to the world aluminum Vtwin in my bike doesnt use fast idle at lunch after sitting half a day at work! and like I said, thats an all aluminum deal with no hood or blanket, just literally sitting out in the wind naked.
I also have a carbon fiber hood on my car, with no heat blanket (and thus has cracked the top coat, but thats besides the point), and it used to have a ceramic coated header, and it would take hours to get "cold". now with bare stainless steel race pipes it would take longer.
__________________
  Reply With Quote
Old 11-19-2008, 04:49 PM   #9 (permalink)
MechE
 
Join Date: Dec 2007
Location: Bay Area
Posts: 1,151

The Miata - '01 Mazda MX-5 Miata
Thanks: 0
Thanked 20 Times in 17 Posts
Quote:
Originally Posted by dichotomous View Post
the 10-30mi you are in a store will not cool an engine enough to where it would need to heat back up to be efficient.
Can you provide some empirical evidence for your claim?
__________________
Cars have not created a new problem. They merely made more urgent the necessity to solve existing ones.
  Reply With Quote
Old 11-19-2008, 05:02 PM   #10 (permalink)
EcoModding Apprentice
 
dichotomous's Avatar
 
Join Date: Nov 2008
Location: vermont
Posts: 142

CivySi - '03 honda civic SI
90 day: 31.99 mpg (US)
Thanks: 0
Thanked 1 Time in 1 Post
yes, fast idle does not happen

__________________
  Reply With Quote
The Following User Says Thank You to dichotomous For This Useful Post:
WD40 (11-30-2009)
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Restore oil additive... suspectnumber961 The Unicorn Corral 46 11-20-2018 01:15 AM
Hood blanket swap Formula413 EcoModding Central 26 04-22-2011 12:58 AM
Moving air intake into the engine compartment? pasadena_commut Aerodynamics 5 07-25-2008 04:24 PM
Coasting experiment: engine on VS engine off on a fixed route = 12.9% gain MetroMPG Hypermiling / EcoDriver's Ed 6 02-22-2008 09:38 AM



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