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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 05-20-2011, 01:45 PM   #51 (permalink)
halos.com
 
Join Date: Oct 2009
Location: Oklahoma City, OK
Posts: 528

ECONORAM - '07 Dodge RAM 1500 QC SLT flex-fuel
90 day: 18.16 mpg (US)

the Avenger - '08 Dodge Avenger SXT
90 day: 27.06 mpg (US)
Thanks: 385
Thanked 92 Times in 78 Posts
Send a message via Yahoo to ECONORAM
Quote:
Originally Posted by Big Dave View Post
Aerohead is probably right. Anair dam plus a belly pan would give the best MPG.

I modified my air dam this summer. It was 3 inches above grade and it grounded at the least provocation (like braking or the steps in my driveway). It worked really well. It was worth at least 0.75 MPG.

But I got tired of listening to it grind, so I shortened it up to 9 inches above grade.

Now it doesn't drag or look dorky, but it is nearly worthless in improving MPG.

I'm trying to learn GIMP so I can shrink down my pix to a size the site can handle.
Very interesting. I've not put an extended air dam on my truck, but after reading this I might have to try that. I also plan to drop mine about 2 inches. Both should help in the MPG arena...

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 06-09-2011, 03:01 PM   #52 (permalink)
EcoModding Lurker
 
Join Date: Jun 2011
Location: 65201
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Thumbs up

Quote:
Originally Posted by Cd View Post
Three miles per gallon ?
That's incredible !

I mean if you had a car that got fifty miles per gallon and noticed a +3 MPG improvement, I'd be impressed ..... but you are starting out with a truck that gets less than half that.
That is a huge change in fuel economy !



No one cought the Nice/ICE road trucker caption ?? NAH ...surely not.
I caught it and I haven't even seen the show ! I think everyone gets it , but they just don't mention it.
Again .. clever play on the name there.
Imagine a world where they didn't screw w/the fuel[100mpg^even the pickups]
  Reply With Quote
Old 08-05-2011, 06:09 PM   #53 (permalink)
EcoModding Lurker
 
Cowboy_Dan's Avatar
 
Join Date: Aug 2011
Location: Frozen Wisconsin
Posts: 9

Blue By You - '96 Ford F250 XLT
Thanks: 0
Thanked 2 Times in 1 Post
Quote:
Originally Posted by Big Dave View Post
Max:
I am on my second iteration of air dam. The first one extended to within 1.5” of grade and got the 27.00 by itself. I also had side skirts where the running boards used to be. They approached 3” of the ground. Air dam & skirts that low dragged the ground a lot. No damage due to the fact they were ripstop conveyor belting but an annoyance all the same. With the air dam that low I probably lost some CdA due to increased frontal area.

Second iteration, I ditched the side skirts (more trouble than they were worth) and raised my air dam up to 6” above grade in front of the wheels and 9” above grade in the center (just covering the steering tie rod). MPG drifted back into the mid 26s. This setup obviously never drags or fouls parking curbs. It passes over most road kill.

Gonna try again, splitting the difference. Probably 3.5” in front of the wheels and 6” in the center.
Any update on the air dam? I'm building one somewhat similar.
__________________
'96 F250 XLT, Diesel, auto, 4x4

"Political Correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."
  Reply With Quote
Old 08-08-2011, 05:47 PM   #54 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 3,430
Thanks: 11
Thanked 2,202 Times in 1,547 Posts
Quote:
Originally Posted by Cowboy_Dan View Post
Any update on the air dam? I'm building one somewhat similar.
I sent a PM to him, maybe we will get some photos.

See the link in my signature on building your own chin spoiler. It is good for an extra 3-mpg on the highway.

I have plans on lowering it even more. Right now it goes over curb stop blocks.
__________________
George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
  Reply With Quote
The Following 2 Users Say Thank You to kach22i For This Useful Post:
DieselFan (09-01-2011), hat4rvn (03-18-2018)
Old 08-08-2011, 08:43 PM   #55 (permalink)
Master EcoModder
 
Big Dave's Avatar
 
Join Date: Jan 2008
Location: Steppes of Central Indiana
Posts: 1,305

The Red Baron - '00 Ford F-350 XLT
90 day: 27.99 mpg (US)

Impala Phase Zero - '96 Chevrolet Impala SS
90 day: 21.03 mpg (US)
Thanks: 0
Thanked 176 Times in 120 Posts
No progress on the air dam. RL gets in the way.

3 MPG is impressive.
__________________
2000 Ford F-350 SC 4x2 6 Speed Manual
4" Slam
3.08:1 gears and Gear Vendor Overdrive
Rubber Conveyor Belt Air Dam
  Reply With Quote
Old 08-09-2011, 08:59 AM   #56 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 3,430
Thanks: 11
Thanked 2,202 Times in 1,547 Posts
Quote:
Originally Posted by Big Dave View Post
No progress on the air dam. RL gets in the way.

3 MPG is impressive.
That number was for the summer (and early fall) of 2009, I lost 1-mpg with the rear spoiler but like the downforce. I lost another 1-mpg with the rubber wheel arch flare lips. I'm only up 1-mpg at this point.

My chin spoiler is 7-1/2" from the ground. I can go over parking stops, which is nice because even I inch up too far once in a while. The plastic lawn strip is 6" high, which will leave me 1/2" to screw to, just enough should I double it and extend downward. At 2" of ground clearance it is similar to 0" of ground clearance from what I've read.

The 2" clear will be similar to my 1977 Porsche Targa 911 with chin spoiler. I've scraped it a few times, but never hit something like a curb stop.

I plan on removing the second chin spoiler on my S-10 for snow. I'm thinking of using butterfly nuts so I can take it off without tools should some idiot back up into me or something.
__________________
George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
  Reply With Quote
Old 02-27-2012, 06:17 AM   #57 (permalink)
EcoModding Lurker
 
Join Date: Feb 2012
Location: texas
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
I drive a class 8 tractor and get 18 mpg without a trailer
  Reply With Quote
Old 02-27-2012, 04:51 PM   #58 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 3,430
Thanks: 11
Thanked 2,202 Times in 1,547 Posts
Quote:
Originally Posted by ICEBOX View Post
I drive a class 8 tractor and get 18 mpg without a trailer
That blows my mind.

Is there anything special you did to it in order to get those results?

Review of the U.S. Department of Energy's Heavy Vehicle Technologies Program


A photo would help.
__________________
George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
  Reply With Quote
Old 05-06-2012, 02:28 PM   #59 (permalink)
radioranger
 
Join Date: Dec 2011
Location: Canton CT
Posts: 442
Thanks: 140
Thanked 41 Times in 31 Posts
thanks for the truck testing, I once ran a small boat on the back of the truck to the shore and the truck seemed to cruise along easier, now I know why , got to find another 8 ft rowboat, cheaper and easier than the cover and you look like your going fishing !! plus you can !
  Reply With Quote
Old 05-06-2012, 02:32 PM   #60 (permalink)
radioranger
 
Join Date: Dec 2011
Location: Canton CT
Posts: 442
Thanks: 140
Thanked 41 Times in 31 Posts
I wonder how much of the air dams effects are from kicking the air around the side of the truck more smoothly and actually keeping it closer to the body instead of kicking the air way out but judging by your results it seems the under body airflow is a bigger factor than I thought, thanks for the air dam info , going to add a bigger air dam to the stock plastic one on my 88 brick ranger, best average MPG is about 26 , very very wind dependant.

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Comparing Warm Air Intakes (WAI) & Cold Air Intakes (CAI) toomuch EcoModding Central 23 05-26-2019 06:41 AM
Honda IACV explained TomO Off-Topic Tech 16 12-21-2015 02:49 AM
2007 Focus Front Air Dam garys_1k Aerodynamics 23 12-28-2011 03:22 PM
Air Dam and Tray (2005 Civic Sedan) Harpo Aerodynamics 14 10-27-2008 01:56 PM
First aero-mod: front air dam jim-frank Aerodynamics 2 05-21-2008 10:43 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com