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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 04-13-2022, 01:07 PM   #1 (permalink)
EcoModding Lurker
 
Join Date: Aug 2011
Location: springfield ma
Posts: 2
Thanks: 1
Thanked 1 Time in 1 Post
Streamlining a brick

Good afternoon all,

After many years away and no longer owning my metro i am back with a fool hearty mission. My current daily and road trip vehicle is a 2005 chevy 2500hd 4door ext cab short bed duramax diesel. Obviously i could get better mileage finding a sixspeed manual swap but its impossible. After doing maintenance, fluid changes, new tires, proper tuning, CAI etc i am averaging 18-19 mpg highway. I know its damn near impossible but i want to shoot for 25mpg highway.

I already have plans of pulling off the huge mirrors and installing smaller oem "sport style" ones, but was also thinking of adding a camback to the bed.

more fuel efficent bumper covers are not in the cards as i constantly work off road and in deer country so the cow catcher bumper has to stay, and with the diesels and their love of airflow a grill block is not practical, was thinking of fabbing a front air skirt and rear wheel covers for road trips though.

Any additional input is welcomed.

Should add it currently has a soft tonneau cover

__________________
2005 2500hd CAI eco tune 235/85r16 tires

Last edited by donaldderby; 04-13-2022 at 01:08 PM.. Reason: forgot to include tonneau cover
  Reply With Quote
The Following User Says Thank You to donaldderby For This Useful Post:
aerohead (04-14-2022)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 04-13-2022, 01:43 PM   #2 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,562
Thanks: 7,738
Thanked 8,554 Times in 7,041 Posts
Welcome.

It's been a while since anyone posted this:

__________________
.
.
Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster

____________________
  Reply With Quote
The Following User Says Thank You to freebeard For This Useful Post:
Joggernot (04-19-2022)
Old 04-13-2022, 02:17 PM   #3 (permalink)
EcoModding Lurker
 
Join Date: Aug 2011
Location: springfield ma
Posts: 2
Thanks: 1
Thanked 1 Time in 1 Post
Thank you. Seems like i might want to try the cab wing first, then it will be even cooler when i do a camback

Quote:
Originally Posted by freebeard View Post
Welcome.

It's been a while since anyone posted this:

__________________
2005 2500hd CAI eco tune 235/85r16 tires
  Reply With Quote
Old 04-13-2022, 02:46 PM   #4 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,562
Thanks: 7,738
Thanked 8,554 Times in 7,041 Posts
This might be of interest. ecomodder.com/forum/showthread.php/roof-spoiler-pick-up-truck-cab-phase-1-a-19525

There is also a thread about a truncated aerocap. perhaps a search term will occur to me.
__________________
.
.
Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster

____________________
  Reply With Quote
The Following User Says Thank You to freebeard For This Useful Post:
donaldderby (04-13-2022)
Old 04-14-2022, 11:28 AM   #5 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,861
Thanks: 23,922
Thanked 7,207 Times in 4,640 Posts
2500 HD

Quote:
Originally Posted by donaldderby View Post
Good afternoon all,

After many years away and no longer owning my metro i am back with a fool hearty mission. My current daily and road trip vehicle is a 2005 chevy 2500hd 4door ext cab short bed duramax diesel. Obviously i could get better mileage finding a sixspeed manual swap but its impossible. After doing maintenance, fluid changes, new tires, proper tuning, CAI etc i am averaging 18-19 mpg highway. I know its damn near impossible but i want to shoot for 25mpg highway.

I already have plans of pulling off the huge mirrors and installing smaller oem "sport style" ones, but was also thinking of adding a camback to the bed.

more fuel efficent bumper covers are not in the cards as i constantly work off road and in deer country so the cow catcher bumper has to stay, and with the diesels and their love of airflow a grill block is not practical, was thinking of fabbing a front air skirt and rear wheel covers for road trips though.

Any additional input is welcomed.

Should add it currently has a soft tonneau cover
Somewhere here at EcoModder we've got a Popular Science road test of an aero-modified Silverado 2500 HD Duramax, with some GM internal memoranda data. I don't have that at hand. Perhaps another member can chase that down.
GM did recommend:
1) grille-blocking
2) under body belly panels on either side of the central tunnel.
3) Full tonneau cover.
------------------------------------------------------------------------------------
4) Dodge's lowest drag RAM 1500 eco used:
* active grille shutters
* Active air suspension ( 1.1-inch of lowering )
* Full tonneau cover
-------------------------------------------------------------------------------------
5) Ford's ATLAS concept truck had :
* active airdam
* active wheel shutters
--------------------------------------------------------------------------------------
6) Brett Herndon's:
* Aerolid = delta Cd 0.67
* Aerotail = delta Cd 0.31
Together, they'd give a Ford F-150 around Cd 0.305 ( a CYBERTRUCK )
--------------------------------------------------------------------------------------
There's a video here about the Toyota T-100 in the wind tunnel.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/

Last edited by aerohead; 04-14-2022 at 11:33 AM.. Reason: add video link
  Reply With Quote
Old 04-15-2022, 10:13 AM   #6 (permalink)
Somewhat crazed
 
Piotrsko's Avatar
 
Join Date: Sep 2013
Location: 1826 miles WSW of Normal
Posts: 4,043
Thanks: 462
Thanked 1,104 Times in 974 Posts
Might be some Zf-6 available in wrecked fords. Same tranny, chevy rates it higher torque, bellhousing might be difficult unless mcleod makes aftermarket.
__________________
casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
  Reply With Quote
Old 04-18-2022, 10:11 AM   #7 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,861
Thanks: 23,922
Thanked 7,207 Times in 4,640 Posts
GM's 2-mpg aero

Here's marginal image from the article.
The high-lighted areas are where the mods were made.
They were testing at 55-mph.
https://ecomodder.com/forum/member-a...mendations.jpg

Attached Thumbnails
Click image for larger version

Name:	member-aerohead-albums-pickup+images-picture269-popular-science-magazine-streamlines-pickup-acco.jpg
Views:	22
Size:	39.3 KB
ID:	31947  
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Reply  Post New Thread


Tags
diesel, full size truck, gmt800

Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com