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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 02-15-2023, 03:37 PM   #1 (permalink)
Master EcoModder
 
Phase's Avatar
 
Join Date: Mar 2022
Location: oregon
Posts: 765

Black Bullet - '19 Hyundai Ioniq Hybrid Blue
Thanks: 0
Thanked 397 Times in 325 Posts
ABA testing with windows up and down?

We all know you get worse gas mileage with the windows down on the highway. Even throttle stop testing and coast down shows windows down creating more drag. But has anyone on the forum actually done some ABA testing with mpg numbers? What about windows just cracked an inch?

Also side note- snow and ice build up on the side of the car or roof line and splatter around wheel arches Really hurts your mpg big time!

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-16-2023, 10:07 AM   #2 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,296
Thanks: 23,411
Thanked 6,919 Times in 4,414 Posts
windows & mpg

Where it's humid, and it can feel like 100-F, when it's 80-F, without AC, you almost wish there was no glass at all!
At 65-mph, by 'tank' mileage I've seen a 2-3 mpg loss with the side windows down, and slider rear window open.
Running the AC at the same speed meant around the same 2-3 mpg loss. So it was a 'wash.'
With modern heat pump systems, I suspect that its more efficient to keep all the windows up, and just run the AC. And on full-recirc where it's super humid.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 02-16-2023, 04:45 PM   #3 (permalink)
Master EcoModder
 
Phase's Avatar
 
Join Date: Mar 2022
Location: oregon
Posts: 765

Black Bullet - '19 Hyundai Ioniq Hybrid Blue
Thanks: 0
Thanked 397 Times in 325 Posts
Quote:
Originally Posted by aerohead View Post
Where it's humid, and it can feel like 100-F, when it's 80-F, without AC, you almost wish there was no glass at all!
At 65-mph, by 'tank' mileage I've seen a 2-3 mpg loss with the side windows down, and slider rear window open.
Running the AC at the same speed meant around the same 2-3 mpg loss. So it was a 'wash.'
With modern heat pump systems, I suspect that its more efficient to keep all the windows up, and just run the AC. And on full-recirc where it's super humid.
Oh yeah itís definitely better to run the ac in modern cars. I was just wondering how much impact on drag coefficient windows down has
  Reply With Quote
The Following User Says Thank You to Phase For This Useful Post:
aerohead (02-16-2023)
Old 02-16-2023, 04:57 PM   #4 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,296
Thanks: 23,411
Thanked 6,919 Times in 4,414 Posts
how much?

Quote:
Originally Posted by Phase View Post
Oh yeah itís definitely better to run the ac in modern cars. I was just wondering how much impact on drag coefficient windows down has
It can be reverse-engineered using the mathematics.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 02-16-2023, 11:42 PM   #5 (permalink)
Master EcoModder
 
Phase's Avatar
 
Join Date: Mar 2022
Location: oregon
Posts: 765

Black Bullet - '19 Hyundai Ioniq Hybrid Blue
Thanks: 0
Thanked 397 Times in 325 Posts
I have an underbody hole about the size of a window lol
  Reply With Quote
Old 02-17-2023, 02:30 PM   #6 (permalink)
aero guerrilla
 
Piwoslaw's Avatar
 
Join Date: Oct 2008
Location: Warsaw, Poland
Posts: 3,665

Svietlana II - '13 Peugeot 308SW e-HDI 6sp
90 day: 58.1 mpg (US)
Thanks: 1,219
Thanked 706 Times in 446 Posts
But to run the A/C you would need to uncover the radiator, so factor in the increaed drag from removing the grille block.
__________________
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


[Old] Piwoslaw's Peugeot 307sw modding thread
  Reply With Quote
The Following User Says Thank You to Piwoslaw For This Useful Post:
aerohead (02-20-2023)
Old 02-18-2023, 12:19 AM   #7 (permalink)
Master EcoModder
 
Phase's Avatar
 
Join Date: Mar 2022
Location: oregon
Posts: 765

Black Bullet - '19 Hyundai Ioniq Hybrid Blue
Thanks: 0
Thanked 397 Times in 325 Posts
Quote:
Originally Posted by Piwoslaw View Post
But to run the A/C you would need to uncover the radiator, so factor in the increaed drag from removing the grille block.
Ac is working fine with my grill block right now?

  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2023, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com