Hood louver theory - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 06-15-2007, 10:46 AM   #1
Registered Member
 
Join Date: Jun 2007
Posts: 11
Country: United States
Hood louver theory

I'm still learning this game, so by all means, flame this post. I've searched for uses for louvers and haven't yet found my answer. I have a station wagon that I don't want to grill block, but do want to up the mpg in the same fashion, with minor aero tweaks.

Theory: if the purpose of a grill block is just to keep air out of the engine bay because it causes drag, would louvers in the top of the hood release that air pressure and gain me some of the grill block advantages?
__________________

__________________
Gay-o is offline   Reply With Quote
Old 06-15-2007, 11:33 AM   #2
Registered Member
 
brucepick's Avatar
 
Join Date: Feb 2007
Posts: 722
Country: United States
Location: Connecticut
Interesting idea. I know there's a high pressure area at the base of the windshield so that would be a bad place for the louvers you're considering.

Maybe louvers at mid-hood would pull air out of the engine bay as a venturi effect?

This board has some people who actually do know a lot about aero - I hope they'll look and write here.

My guess is - since the engine bay is not at all a clean-path type of aerodynamic environment, any air going through there is better off not getting in the engine bay in the first place. Probably better to push it off to the sides with a bullet-shaped nose and air dam, or let it flow over the hood and windshield where it is relatively unobstructed.
__________________

__________________
Currently getting +/- 50 mpg in fall weather. EPA is 31/39 so not too shabby. WAI, fuel cutoff switch, full belly pan, smooth wheel covers.

Now driving '97 Civic HX; tires ~ 50 psi. '89 Volvo 240 = semi-retired.
brucepick is offline   Reply With Quote
Old 06-15-2007, 11:54 AM   #3
Registered Member
 
Join Date: Jun 2007
Posts: 11
Country: United States
Quote:
Originally Posted by brucepick View Post
My guess is - since the engine bay is not at all a clean-path type of aerodynamic environment, any air going through there is better off not getting in the engine bay in the first place. Probably better to push it off to the sides with a bullet-shaped nose and air dam, or let it flow over the hood and windshield where it is relatively unobstructed.
Good point. I was thinking mid hood, like an Evo-scoop or something, and you see race cars with the louvers over the wheelwells also, but your point will still be an issue.

My Volvo 850 is no sleeker than your brick, and the Geo's much more worthy (and cost-effective) of any modifications, so the wagon in reality will probably receive no mods.
__________________
Gay-o 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
6 fuel-ups in two months now 6 fuel-ups a month? acebrock Fuelly Web Support and Community News 5 07-28-2011 02:29 AM
Feature Request: Cost field in Notes leif81 Fuelly Web Support and Community News 2 02-06-2010 03:48 AM
Love this place! brelandt Introduce Yourself - New member Welcome 7 01-01-2007 10:02 AM
Honda TPS Sensor Blowout! $15/ea Matt Timion For Sale 0 09-13-2006 09:09 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 06:48 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.