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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 05-21-2020, 12:23 AM   #81 (permalink)
Master EcoModder
 
aardvarcus's Avatar
 
Join Date: Apr 2012
Location: Evensville, TN
Posts: 613

Deep Blue - '94 GMC Suburban K2500 SLE
90 day: 23.75 mpg (US)

Griffin (T4R) - '99 Toyota 4Runner SR5
90 day: 25.43 mpg (US)
Thanks: 212
Thanked 512 Times in 282 Posts
Aerohead, thanks for all your feedback. I spent a bit of time crawling over the vehicle today with a tape measure. There is a bit more room than I had remembered at the start of the cargo area prior to the window to patch in some compound curve. Looks like at least 6 inches growing to 9. The cargo area is already tapered in with a minor amount of compound curve (.45 to .90 to 1.18 degrees) as you go back. I am contemplaing the angle to set the sides. Doing some overlays, i am considering aiming for 6 degrees right after the 6-9 inch transition. That results in the vechicle sloping from 76 inches down to approximately 60 inches over a lenght of 69 inches, pulled in 6.5 more inches per side from stock. This seems to reasonably align with a 4:1 streamline from a top view.

There really isnt a constraint on the angle i set provided it stays between 4.2 and 7.3 degrees, with rear widths between 64 and 57 inches for that range. Obviously this is a big project so I would like to squeeze out as much as possible.

  Reply With Quote
The Following User Says Thank You to aardvarcus For This Useful Post:
aerohead (05-22-2020)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 05-22-2020, 12:27 PM   #82 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 11,080
Thanks: 17,520
Thanked 5,911 Times in 3,584 Posts
over a length

Quote:
Originally Posted by aardvarcus View Post
Aerohead, thanks for all your feedback. I spent a bit of time crawling over the vehicle today with a tape measure. There is a bit more room than I had remembered at the start of the cargo area prior to the window to patch in some compound curve. Looks like at least 6 inches growing to 9. The cargo area is already tapered in with a minor amount of compound curve (.45 to .90 to 1.18 degrees) as you go back. I am contemplaing the angle to set the sides. Doing some overlays, i am considering aiming for 6 degrees right after the 6-9 inch transition. That results in the vechicle sloping from 76 inches down to approximately 60 inches over a lenght of 69 inches, pulled in 6.5 more inches per side from stock. This seems to reasonably align with a 4:1 streamline from a top view.

There really isnt a constraint on the angle i set provided it stays between 4.2 and 7.3 degrees, with rear widths between 64 and 57 inches for that range. Obviously this is a big project so I would like to squeeze out as much as possible.
There's a plan-view image of Cybertruck online. Tesla gave it 6-different widths, kind of a planar approximation of body side camber. From the rear of the rear door cut line, Cybertruck is boat-tailed to the end of the vault. Very much like what you're going after on Deep Blue. A great mod!

__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Reply  Post New Thread


Tags
suburban diesel 4x4 gmc

Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com