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Old 06-27-2012, 08:56 AM   #21 (permalink)
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White Whale - '07 Dodge Ram 2500 ST Quad Cab 2wd, short bed
Team Cummins
90 day: 37.68 mpg (US)
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Way to go, man! I'll be interested to see the FE results.

I'd love to see the looks you're gonna get from people as you drive by!

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Diesel Dave

My version of energy storage is called "momentum".
My version of regenerative braking is called "bump starting".

1 Year Avg (Every Mile Traveled) = 47.8 mpg

BEST TANK: 2,009.6 mi on 35 gal (57.42 mpg): http://ecomodder.com/forum/showthrea...5-a-26259.html


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Old 06-27-2012, 03:59 PM   #22 (permalink)
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Woody - '96 Dodge Ram 2500 SLT
Team Cummins
90 day: 23.82 mpg (US)

Avion and Woody - '96 Dodge/Avion Ram 2500/5th wheel combo
90 day: 15.1 mpg (US)

TD eye eye eye - '03 Volkswagen Beetle GLS
90 day: 49.05 mpg (US)

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OK, I'm back after two distinct legs.
First leg:
Over Chinook pass to the lower valley, sea level to 5430 and back down. Rain in the mountains. Speeds from 60 down to 35.
149 miles, 5.47 gallons, 27.24 MPG
Second leg: Interstate 82 and Interstate 90
Moderate winds
Speeds right at 66 by cruise control. Did some 71 till I got wise.
471 miles, 18.05 gallons, 26.09 MPG. Speed Kills.........economy

truck configuration:
No bellypan. It had been removed for some maintenance and I ran out of time.
No diffiuser. The tail was absolutely open on the bottom.
No grill block on the first leg. DOH! I left it home, and put some cardboard in at the next stop.

Plusses: I did not drop any parts off. The lights worked. The plastic kept the rain off the cardboard.
Minuses: The plastic came loose over large parts of the critical area between 10% and 30%. I think that billowing plastic caused some problems.
The plastic at the cab/shell joint stretched up, also tripping some things.
The sides of the tail are atrocious! I had no time to really address that. Plastic was starting to tear there.
I think I had the incidence too steep to start with, especially considering the less than ideal surface condition. If I had time I could have peeled off the plastic today, no more rain. I was a little concerned it had some structural benefit in some areas, and the leading lip of cardboard looked very vulnerable to peel back without it.
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2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle

currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears
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Old 06-27-2012, 04:31 PM   #23 (permalink)
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White Whale - '07 Dodge Ram 2500 ST Quad Cab 2wd, short bed
Team Cummins
90 day: 37.68 mpg (US)
Thanks: 112
Thanked 511 Times in 213 Posts
26+ mpg at 60+mph--over the mountains with wind and rain, is a truely remarkable accomplishment! My guess is that you would have broken 30 mpg with the belly pan, etc. all attached.
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Diesel Dave

My version of energy storage is called "momentum".
My version of regenerative braking is called "bump starting".

1 Year Avg (Every Mile Traveled) = 47.8 mpg

BEST TANK: 2,009.6 mi on 35 gal (57.42 mpg): http://ecomodder.com/forum/showthrea...5-a-26259.html


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Old 06-27-2012, 04:35 PM   #24 (permalink)
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White Whale - '07 Dodge Ram 2500 ST Quad Cab 2wd, short bed
Team Cummins
90 day: 37.68 mpg (US)
Thanks: 112
Thanked 511 Times in 213 Posts
Any plans on doing a coast-down test to determine the Cd?
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Diesel Dave

My version of energy storage is called "momentum".
My version of regenerative braking is called "bump starting".

1 Year Avg (Every Mile Traveled) = 47.8 mpg

BEST TANK: 2,009.6 mi on 35 gal (57.42 mpg): http://ecomodder.com/forum/showthrea...5-a-26259.html


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Old 06-27-2012, 05:36 PM   #25 (permalink)
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26 mpg with a full size truck. That is impressive. I can only imagine the looks you get with that cap. I put a aero cap and huge spoiler on the front of my silverado, and it draws looks no matter where I go, and mine is nowhere near the size of yours. Gives me inspiration to continue on. Thanks
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Old 06-27-2012, 07:09 PM   #26 (permalink)
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Woody - '96 Dodge Ram 2500 SLT
Team Cummins
90 day: 23.82 mpg (US)

Avion and Woody - '96 Dodge/Avion Ram 2500/5th wheel combo
90 day: 15.1 mpg (US)

TD eye eye eye - '03 Volkswagen Beetle GLS
90 day: 49.05 mpg (US)

Mule - '07 Dodge Ram 3500 ST
Thanks: 743
Thanked 528 Times in 344 Posts
Quote:
Any intentions of doing a more permanent version?
I will probably use the truss sections up to the back of the bumper, cut them there, and use as a foundation for an aeroshell. I may use the tails that I cut off to make a plug-in boat tail. Or not
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2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle

currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears
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Old 06-27-2012, 07:45 PM   #27 (permalink)
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Outasight - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 54.18 mpg (US)
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Shoot, you basically got about double the EPA combined estimate for that truck - excellent!

I've done a few wood aero mods myself... Nothing as elaborate as what you took on though!
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Old 06-27-2012, 09:02 PM   #28 (permalink)
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Join Date: Apr 2011
Location: Tacoma WA
Posts: 1,399

Woody - '96 Dodge Ram 2500 SLT
Team Cummins
90 day: 23.82 mpg (US)

Avion and Woody - '96 Dodge/Avion Ram 2500/5th wheel combo
90 day: 15.1 mpg (US)

TD eye eye eye - '03 Volkswagen Beetle GLS
90 day: 49.05 mpg (US)

Mule - '07 Dodge Ram 3500 ST
Thanks: 743
Thanked 528 Times in 344 Posts
Quote:
Originally Posted by Diesel_Dave View Post
Any plans on doing a coast-down test to determine the Cd?
Maybe when I put it back on. I have it 90% removed now. Installed yesterday morning, removed today. Whew!
I am hoisting it up in the carport for now. If I have any decent length driving trips to do, and I don't need to move the 5th wheel, I will re-install it and do some tweaks.
I think lifting it up a few degrees will not hurt a bit.
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2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle

currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears
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Old 06-27-2012, 09:51 PM   #29 (permalink)
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Location: Vermont, USA
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FrankenJetta D - '90 Volkswagen Jetta GL
Boat tails and more mods
Diesel
TEAM VW AUDI Group
90 day: 64.35 mpg (US)
Thanks: 191
Thanked 144 Times in 98 Posts
Looking good, Man. Did you notice many camera/phones pointed in your general direction?
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Quote:
It is always very amusing how our imagination is put to the test when overcoming reality. Redyaris
Boat tail project
How to gently bump start during EOC
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Old 06-27-2012, 11:59 PM   #30 (permalink)
ron
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double eagles - '99 Dodge ram slt
Team Cummins
90 day: 19.48 mpg (US)
Thanks: 24
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Nice clean lines.! I have started an aero nose for my 99 2500 slt , If I can get my son to add a picture Ill do so. just ribs at the moment. started on sunday 6-24-12 I am making paper templates of all parts for duplicates if it does what i think it would fit your rig I think

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