Go Back   EcoModder Forum > EcoModding > General Efficiency Discussion
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 02-09-2011, 12:29 AM   #11 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,002

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,375
Thanked 2,905 Times in 1,852 Posts
Make an engine compartment "blanket" and combine it with a grille block for best results.

__________________


  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-09-2011, 12:38 AM   #12 (permalink)
Master EcoModder
 
redneck's Avatar
 
Join Date: Jun 2009
Location: SC Lowcountry
Posts: 917

Geo XL1 - '94 Geo Metro
Team Metro
Boat tails and more mods
90 day: 72.22 mpg (US)

Big, Bad & Flat - '01 Dodge Ram 3500 SLT
Team Cummins
90 day: 21.13 mpg (US)
Thanks: 149
Thanked 808 Times in 328 Posts
A piece of cardboard wired up in front of the radiator will do wonders and is simple to do.

Also, you could put a electric heater in the inside of the car on a timer. That way it will be toasty warm when you get in for your commute.

>
  Reply With Quote
Old 02-09-2011, 04:40 AM   #13 (permalink)
EcoModding Newb
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 2,984

Acura TSX - '06 Acura TSX
90 day: 31.25 mpg (US)

Lafawnda - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Prius Plug-in - '12 Toyota Prius Plug-in
90 day: 79.06 mpg (US)

Mazda CX-5 - '17 Mazda CX-5 Touring
Thanks: 1,154
Thanked 912 Times in 610 Posts
If I do any mod more involved than a simple grill block, it will be to add a taller final drive to my TSX. I'm turning 3000rpm at 70mph, which is fairly disgusting, especially when you consider how naturally slippery my car is (.27 Cd).

Question-
Why is it necessary for an engine to burn rich while cold? I've never understood why choking an engine allows it to start, because intuitively you would think providing at least enough O2 to completely burn the fuel would be ideal.

Quote:
Originally Posted by KITT222 View Post
Okay, first person to make an exhaust-heated car heating system wins... something. Go!
I suppose it would provide heat sooner than waiting for water to heat up, but you don't want to steal heat from the exhaust for efficiency and emission reasons.

If we really want to talk efficiency, then we must acknowledge that heating our environment for comfort is extremely inefficient when all that is required for comfort is a regulated micro-layer of air next to the skin. In other words, put on warm cloths.

Whenever I hear the furnace turn on at home, I just think how silly it is to heat thousands of cubic feet of air when less than 1ft is sufficient for comfort. If I didn't have roommates, I'd set the temp at 55.
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
  Reply With Quote
Old 02-09-2011, 05:28 AM   #14 (permalink)
Eco-ventor
 
jakobnev's Avatar
 
Join Date: Oct 2010
Location: sweden
Posts: 1,099

Princess - '92 Mazda MX-3 GS
House of Tudor
Team Mazda
90 day: 53.54 mpg (US)
Thanks: 39
Thanked 313 Times in 205 Posts
Send a message via MSN to jakobnev
Quote:
I suppose it would provide heat sooner than waiting for water to heat up, but you don't want to steal heat from the exhaust for efficiency and emission reasons.
How do you think removing heat from the exhausts after the catalytic converter would effect either of those?
__________________




2016: 128.75L for 1875.00km => 6.87L/100km (34.3MPG US)
2017: 209.14L for 4244.00km => 4.93L/100km (47.7MPG US)
  Reply With Quote
Old 02-09-2011, 09:28 AM   #15 (permalink)
aero guerrilla
 
Piwoslaw's Avatar
 
Join Date: Oct 2008
Location: Warsaw, Poland
Posts: 3,495

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

Theodor - '01 Peugeot 106
90 day: 46.17 mpg (US)
Thanks: 1,005
Thanked 600 Times in 376 Posts
Once on a trip my radiator fan didn't work and I noticed that turning the heat up on long uphills helped keep the engine's temperature under control. Also, after I did my idle test I cranked up the heat to see what happens.
Quote:
Originally Posted by Piwoslaw View Post
After the test was finished I turned the heat and blower on and set them to max, and the coolant temperature instantly dropped 10 degrees to 55°C (131°F). I then drove 2km to the vet (with the heat on) and the coolant temperature never rose above 55°C.
As Frank Lee mentioned, a grille block and engine blanket are the best (and cheapest) way to speed up warming time. These work even when you can't plug your heater in.

Quote:
Originally Posted by KITT222 View Post
Okay, first person to make an exhaust-heated car heating system wins... something. Go!
Here's some info if anyone is interested:
Mimicking Gen3 Prius Exhaust Heat Recovery
__________________
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
Old 02-09-2011, 05:39 PM   #16 (permalink)
Master EcoModder
 
Ryland's Avatar
 
Join Date: Jan 2008
Location: Western Wisconsin
Posts: 3,904

honda cb125 - '74 Honda CB 125 S1
90 day: 79.71 mpg (US)

green wedge - '81 Commuter Vehicles Inc. Commuti-Car

Blue VX - '93 Honda Civic VX
Thanks: 867
Thanked 430 Times in 351 Posts
Quote:
Originally Posted by KITT222 View Post
Okay, first person to make an exhaust-heated car heating system wins... something. Go!
My parents Honda N600 has exhaust heat in the cabin, mostly because it's an air cooled engine, problem with it is tiny exhaust leaks make them self known really quickly, if they used the car in the winter I would be tempted to have a stainless steal heat exchanger built.
  Reply With Quote
Old 02-09-2011, 05:54 PM   #17 (permalink)
EcoModding Newb
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 2,984

Acura TSX - '06 Acura TSX
90 day: 31.25 mpg (US)

Lafawnda - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Prius Plug-in - '12 Toyota Prius Plug-in
90 day: 79.06 mpg (US)

Mazda CX-5 - '17 Mazda CX-5 Touring
Thanks: 1,154
Thanked 912 Times in 610 Posts
Quote:
Originally Posted by KITT222 View Post
Okay, first person to make an exhaust-heated car heating system wins... something. Go!
VW Beetles have exhaust heat, and it's a mess just like the rest of the car. The heat exchanger/exhaust manifold rusts and develops leaks. All of a sudden your cabin is filling with CO.

I agree with Einstein's statement that "things should be made as simple as possible, but no simpler", but those cars were a bit too simple.

Quote:
Originally Posted by jakobnev View Post
How do you think removing heat from the exhausts after the catalytic converter would effect either of those?
It would be minimal, but forcing exhaust through a radiator or other heat exchanging path would induce back pressure. I fail to see the advantage of exhaust heat used for heating the cabin.
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
  Reply With Quote
Old 02-10-2011, 12:40 AM   #18 (permalink)
Banned
 
Join Date: Dec 2009
Location: NY
Posts: 865
Thanks: 29
Thanked 111 Times in 83 Posts
Quote:
Originally Posted by redneck View Post
A piece of cardboard wired up in front of the radiator will do wonders and is simple to do.
On some cars you can slip a piece of cardboard or thin paneling right in front of the radiator to do an easily removable radiator block for cold operation.

Quote:
Also, you could put a electric heater in the inside of the car on a timer. That way it will be toasty warm when you get in for your commute.
You might save a few pennies on gas, but you'll spend them on your electric bill, preheating a cabin that gets cold again as soon as you open the door, unfortunately.

In cold weather operation I run with a radiator block (see above), an auxiliary heated seat cushion and I wear a wired jacket that I plug in, accommodating heated 12V motorcycle gloves that I wear while driving. If your butt is warm and your hands are warm, that's what matters most. BTW, the heated gloves were the best $100 I ever spent.
  Reply With Quote
Old 02-10-2011, 07:25 AM   #19 (permalink)
aero guerrilla
 
Piwoslaw's Avatar
 
Join Date: Oct 2008
Location: Warsaw, Poland
Posts: 3,495

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

Theodor - '01 Peugeot 106
90 day: 46.17 mpg (US)
Thanks: 1,005
Thanked 600 Times in 376 Posts
Quote:
Originally Posted by Thymeclock View Post
In cold weather operation I run with a radiator block (see above), an auxiliary heated seat cushion and I wear a wired jacket that I plug in, accommodating heated 12V motorcycle gloves that I wear while driving. If your butt is warm and your hands are warm, that's what matters most. BTW, the heated gloves were the best $100 I ever spent.
Just out of curiosity, what is the energy draw of each of those?
__________________
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
Old 02-10-2011, 08:34 AM   #20 (permalink)
Eco-ventor
 
jakobnev's Avatar
 
Join Date: Oct 2010
Location: sweden
Posts: 1,099

Princess - '92 Mazda MX-3 GS
House of Tudor
Team Mazda
90 day: 53.54 mpg (US)
Thanks: 39
Thanked 313 Times in 205 Posts
Send a message via MSN to jakobnev
Quote:
Originally Posted by redpoint5 View Post
It would be minimal, but forcing exhaust through a radiator or other heat exchanging path would induce back pressure.
Suppose that "heat exchanging path" had exatly the same geometry on the inside as your current exaust system?

Quote:
I fail to see the advantage of exhaust heat used for heating the cabin.
I guess exept for allowing your engine to warm up faster it would be completely useless..

__________________




2016: 128.75L for 1875.00km => 6.87L/100km (34.3MPG US)
2017: 209.14L for 4244.00km => 4.93L/100km (47.7MPG US)
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com