Engine compartment airflow - Fuelly Forums

Click here to see important news regarding the aCar App

Thread Tools Display Modes
Old 06-02-2007, 05:52 AM   #1
Registered Member
Join Date: May 2007
Posts: 15
Country: United States
Engine compartment airflow

I was wondering if anyone has any thoughts on improving airflow around the engine (front mounted)? I was thinking of making a radiator shroud between the engine and radiator. The shroud would begin at the bottom of the radiator as far forward as possible. The top of the shroud would be as far back as possible creating as much angle as possible. This shroud would contain all of the airflow leaving the radiator. All others sources of airflow could then hopefully be blocked from entering the engine compartment. The shroud would direct the airflow into a wide duct, which could be as simple as light flashing attached across the entire underside of the hood. The duct could then vent across the entire width of the hood between it and the windshield. If the underside of the compartment was belly panned and the compartment itself was sealed off the only air coming in would have to move through the shroud and duct.

It seems that unless you suffer a really big weight penalty it could help the economy of the vehicle by directing the airflow and missing a lot of flat vertical surfaces on the engine and in the engine compartment.

My other thought is that the engine and under hood components must receive some benefit in cooling from the air flowing around them normally. So their could be unforeseen problems in doing this.

Or could the whole thing be a waste of time because after the air passes the radiator it becomes "dead" and you would not suffer anymore aerodynamic penalty afterwards?

Any thoughts?

roadyj is offline   Reply With Quote
Old 06-02-2007, 07:00 AM   #2
Registered Member
boofighter's Avatar
Join Date: May 2007
Posts: 76
Country: United States
like this?

but closer to the rad. and have a duct to bring the air straight up.
i have thought about this as well.

boofighter is offline   Reply With Quote
Old 06-02-2007, 07:32 AM   #3
Registered Member
Join Date: May 2007
Posts: 231
Country: United States
What are you working on? Rads are mounted to the front mostly because it's easier, but it isn't necessarily required. It can be mounted anywhere you can get airflow to it at. Provided you could draw air in, and protect it from road debris, you could even mount it at the rear of your vehicle.
Telco is offline   Reply With Quote
Old 06-02-2007, 07:42 AM   #4
Registered Member
psyshack's Avatar
Join Date: May 2006
Posts: 443
Country: United States
I made a engine belly pan for my Civic. I was apparent that mass amounts of air were coming up from under the car. Ive owned many FWD cars in the past and NONE had this much trash carrying underhood air movement. Not even our current Accord has as much.

The pan helped a whole lot. The engine bay now stays very clean. Even cleaner than the Accords. The car doesn't have grill blocks as of yet. But the engine belly pan really helped. Its like night and day.

I was hoping that it would help with air drag. But I cant tell its done a darn thing for the mpg. The engine bay stays way cleaner. and I like my engines clean.

09 HCHII, w/Navi
07 Mazda3 S Touring, 5MT
Mild Hypermiler or Mad Man?
psyshack is offline   Reply With Quote
Old 06-02-2007, 08:05 AM   #5
Registered Member
Join Date: May 2007
Posts: 15
Country: United States
All thanks for the comments...

boofighter- I was thinking of running the entire length of the hood and having the air exit where the hood meets the windshield. However yours is a much better idea. Also thinking about what Telco said above I could move the rad or just adjust its mounting angle tilting it back in conjuction with duct work and vent through the hood. Then seal the air off from the rest of the engine compartment. Same effect less work less weight.
roadyj is offline   Reply With Quote

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
More SMS Requests zbret Fuelly Web Support and Community News 16 02-03-2011 12:09 AM
Incorrect Milage Calcuatlion PatM Fuelly Web Support and Community News 4 07-17-2009 07:21 PM
ECT Analyzer/manual TC lockup GasSavers_Bruce Transmissions and Running Gear 60 04-01-2008 10:37 AM
"active" aero grille slats on 06 civic concept MetroMPG General Fuel Topics 21 01-03-2006 12:02 PM
vegpowered systems GasSavers_Diemaster Vegetable Oil and BioDiesel 2 09-08-2005 04:53 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -8. The time now is 06:24 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.