VW Golf windows - Fuelly Forums

Click here to see important news regarding the aCar App

Reply
 
Thread Tools Display Modes
 
Old 08-03-2006, 05:46 PM   #1
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
VW Golf windows

Source: Energy Efficient Transportation for Florida
__________________

MetroMPG is offline   Reply With Quote
Old 08-03-2006, 05:55 PM   #2
Registered Member
 
zpiloto's Avatar
 
Join Date: Mar 2006
Posts: 1,225
Country: United States
That really pretty good with AC on only to lose 12%. On our Honda van it's 20%. With the windows, was it all windows open all the way or just the front windows. I couldn't tell from the article.
__________________

zpiloto is offline   Reply With Quote
Old 08-03-2006, 06:03 PM   #3
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
It doesn't say.
MetroMPG is offline   Reply With Quote
Old 08-03-2006, 06:30 PM   #4
Registered Member
 
Join Date: Oct 2005
Posts: 1,978
Country: United States
104f/40c

Quote:
Originally Posted by MetroMPG
It's about the FE penalty I would have expected to see for windows all the way open.
Honestly, I'm an absolute wuss when it comes to the heat. I'd perform some serious other mods before giving up my beloved cool air. Zpilito can probably help me here, but 104F/40C with high humidity is downright miserable. I do appreciate the science behind the open window theory (to which I subscribe). It really depends on the spare engine load and the compressor resistance, which varies with every vehicle. In the mean-time, I'm trying to use the re-circ button all the time to reduce the need to compress as often.

I was thinking that when the A/C days go away, we should see an increase in FE for those of us that will have used it. Since we're getting Ethanol instead of MTBE all year, there shouldn't be much change in energy-per-combustion. The true test will be whose vehicle likes an HAI or not (and also cold starts - of which some have an EBH )

RH77
__________________
rh77 is offline   Reply With Quote
Old 08-03-2006, 06:58 PM   #5
Registered Member
 
omgwtfbyobbq's Avatar
 
Join Date: Jul 2006
Posts: 1,516
Country: United States
Only 2.5% change in drag with windows down? I don't think so, that's like.... really really tiny. An increase in wind speed of 2mph can increase fluid drag by 10%, which is why it's kinda hard to sniff out aero improvements unless you take the average over thousands of miles. Or have a device that can show you the instantaneous energy required at certain points, which you can then compare many times.
__________________
Quote:
Originally Posted by FormulaTwo
I think if i could get that type of FE i would have no problem driving a dildo shaped car.
omgwtfbyobbq is offline   Reply With Quote
Old 08-03-2006, 07:13 PM   #6
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
Out of curiosity, what size of change would you have expected to see?
MetroMPG is offline   Reply With Quote
Old 08-03-2006, 07:44 PM   #7
Registered Member
 
omgwtfbyobbq's Avatar
 
Join Date: Jul 2006
Posts: 1,516
Country: United States
I would've expected something larger since it seems like the windows are larger than the wheel wells, and would induce more drag because the area they're near would usually have minimal seperation/turbulence, unlike the underbody. So... I went outside and measured the windows and rear wheel wells on my two door mk1 golf, apparently my mind is playing tricks on me, because they have about the same area!
In terms of calculating increases in FE wrt drag, since very slight changes in wind speed and direction can result in differences in energy that are much larger than 2.5% I wonder how accurate those tests can be? Specifically, a .82mph change in opposing wind speed at 67mph will lead to a 2.5% increase in energy required to overcome fluid drag. I can't think of any place that's not subject to 1mph variations in wind speed. Course I'm no meteorologist...
__________________
Quote:
Originally Posted by FormulaTwo
I think if i could get that type of FE i would have no problem driving a dildo shaped car.
omgwtfbyobbq is offline   Reply With Quote
Old 08-03-2006, 08:32 PM   #8
*shrug*
 
Join Date: Sep 2005
Posts: 6,195
Country: United States
I think that's reasonable. I base this mainly on the fact that I see no noticable instantaneous difference when I roll up/down my windows, and it really doesn't get all that loud/windy in my car. I've been thinking about pulling my a/c while the car is ripped up, but Iono if I should, I'm sure the folks will get super pissed off, though it's not like it's every worked anyway. Mehbe towards the winter when I'm home I'll do it.
__________________

SVOboy is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Server Time ynpmoose Fuelly Web Support and Community News 2 12-20-2013 11:53 AM
Combine vehicles for Stats .. rumrunner Fuelly Web Support and Community News 2 11-27-2011 11:43 PM
MPG: gasoline, diesel, CNG, etc equivalency jhu General Fuel Topics 6 07-05-2009 03:08 PM
UK setting incorrectly showing kilometers? DarkBahamut Fuelly Web Support and Community News 4 12-22-2008 02:51 AM
Hey Guys!, 92 civic vx here. coastmonster Introduce Yourself - New member Welcome 14 12-12-2007 09:48 AM

» Fuelly iOS Apps
Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 02:10 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.