Effect of Air Dam - Fuelly Forums

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

Reply
 
Thread Tools Display Modes
 
Old 06-18-2008, 04:59 PM   #1
Registered Member
 
Join Date: Nov 2007
Posts: 125
Country: United States
Effect of Air Dam

Well, I finally got my air dam testing done. Six fill-ups over 2200 miles. Three with air dam vs three without air dam.

Without air dam: 26.34 MPG
With air dam: 27.00 MPG

That equates to $1.72 less per fillup at local prices.
__________________

__________________
2000 Ford F-350 Super Cab Pickup
4x2, 6 speed manual
Regeared to 3.08:1
4 inch suspension slam
Aero mods: "Fastback" fairing and rugged air dam and side skirts
Stock MPG: 19
Summer MPG: 27.0
Winter MPG: 24
Big Dave is offline   Reply With Quote
Old 06-18-2008, 05:19 PM   #2
Registered Member
 
theholycow's Avatar
 
Join Date: Apr 2008
Posts: 6,624
Country: United States
Send a message via ICQ to theholycow Send a message via AIM to theholycow Send a message via MSN to theholycow Send a message via Yahoo to theholycow
Is this the air dam that you are talking about?

I've been wondering how well it would help a full size pickup. Thanks.
__________________

__________________
This sig may return, some day.
theholycow is offline   Reply With Quote
Old 06-18-2008, 08:06 PM   #3
Registered Member
 
Join Date: Apr 2008
Posts: 217
Country: United States
Quote:
Originally Posted by theholycow View Post
Is this the air dam that you are talking about?
I've been wondering how well it would help a full size pickup. Thanks.
Jeebus. That's extreme.
dosco is offline   Reply With Quote
Old 06-19-2008, 10:57 AM   #4
Registered Member
 
Join Date: Jun 2008
Posts: 12
Country: United States
Makes it look like a big rig. I kinda dig it.
__________________
Clarkson
96 Chevy Pickup
Atclarkson is offline   Reply With Quote
Old 06-19-2008, 11:31 AM   #5
Registered Member
 
Join Date: Jun 2008
Posts: 123
Country: United States
Quote:
Originally Posted by dosco View Post
Jeebus. That's extreme.
i agree
COMP is offline   Reply With Quote
Old 06-19-2008, 02:35 PM   #6
Registered Member
 
lunarhighway's Avatar
 
Join Date: Dec 2006
Posts: 360
Country: United States
congrats on the bold mod! glad to see it's paying off to, one advantage of high fuel prices is there's real money to be made by looking a little odd on the road.
it would be interesting to see what the effect of a dam half the height, or better wich is only a little higher in the center than at the sides.

all that air will now have to be pushed over and around the truck, wich will take energy to, and which will cause more pressure at the front.
maybe allowing some air under the truck will cause less overall drag.
if you have to choose between a long paved road and a short uneven path, sometimes takeing the uneven path will take less effort.. especially if the paved road is crowded...if you know what i mean.

no doubt your setup works well though, just wondering if it couldn't be even better.
__________________

lunarhighway is offline   Reply With Quote
Old 06-19-2008, 06:02 PM   #7
Registered Member
 
Join Date: Nov 2007
Posts: 125
Country: United States
Big results require bold measures. Ask basjoos.

I'm looking for someone to fab me a decent bumper to make this a little less esthetically jarring.

My truck does not lend itself to a belly pan, but being slammed it required very little extra frontal height, so I am giving a little frontal area to keep the air flow out of the underbody area. All those Sprint Cup guys have access to wind tunnels and use this principle (plus a belly pan).

Next step is side skirts to further have the underbody working in still air.
__________________
2000 Ford F-350 Super Cab Pickup
4x2, 6 speed manual
Regeared to 3.08:1
4 inch suspension slam
Aero mods: "Fastback" fairing and rugged air dam and side skirts
Stock MPG: 19
Summer MPG: 27.0
Winter MPG: 24
Big Dave is offline   Reply With Quote
Old 06-19-2008, 06:35 PM   #8
Registered Member
 
theholycow's Avatar
 
Join Date: Apr 2008
Posts: 6,624
Country: United States
Send a message via ICQ to theholycow Send a message via AIM to theholycow Send a message via MSN to theholycow Send a message via Yahoo to theholycow
Why wouldn't it work well with a belly pan? All you need is a lighter version of the offroading skid plate that must be common for your truck.
__________________
This sig may return, some day.
theholycow is offline   Reply With Quote
Old 06-19-2008, 07:35 PM   #9
Site Team / Moderator
 
Jay2TheRescue's Avatar
 
Join Date: Sep 2008
Location: Northern Virginia
Posts: 4,657
Country: United States
Location: Northern Virginia
I was thinking of just extending the factory air dam on my truck by bolting on a piece of black corrugated plastic. I'm thinking it won't be too noticeable, and should be relatively cheap and easy to fabricate & install.

-Jay

Quote:
Originally Posted by Big Dave View Post
Big results require bold measures. Ask basjoos.

I'm looking for someone to fab me a decent bumper to make this a little less esthetically jarring.


My truck does not lend itself to a belly pan, but being slammed it required very little extra frontal height, so I am giving a little frontal area to keep the air flow out of the underbody area. All those Sprint Cup guys have access to wind tunnels and use this principle (plus a belly pan).

Next step is side skirts to further have the underbody working in still air.
__________________






Jay2TheRescue is offline   Reply With Quote
Old 06-19-2008, 07:51 PM   #10
Registered Member
 
Join Date: May 2007
Posts: 447
Country: United States
Quote:
Originally Posted by dosco View Post
Jeebus. That's extreme.
I was think the same, but with a different word!
__________________

__________________
slurp812 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
Incorrect Milage Calcuatlion PatM Fuelly Web Support and Community News 4 07-17-2009 08:21 PM
Using a GPS for fuel economy ketel0ne General Fuel Topics 30 05-04-2009 12:59 PM
Gallons per Mile? nerb Fuelly Web Support and Community News 1 11-12-2008 04:33 AM
Question about soloenoid. omgwtfbyobbq General Maintenance and Repair 12 12-28-2006 10:42 PM
Looking for Insight wheel numbers GasSavers_Ryland General Maintenance and Repair 3 07-08-2006 11:02 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 02:06 PM.


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