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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 10-01-2012, 02:49 PM   #11 (permalink)
Master EcoModder
 
Big Dave's Avatar
 
Join Date: Jan 2008
Location: Steppes of Central Indiana
Posts: 1,319

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 186 Times in 127 Posts
I like your idea, but I would not slant the bumper.

At the speeds necessary for MPG, trucks have plenty of front end downforce. A slated bumper would add downforce and generate drag. Air has weight and "making your hole in the air" by pushing it up over the vehicle requires energy. Pushing it around the vehicle requires energy too, but not as much as lifting the mass of air.

__________________
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
The Following User Says Thank You to Big Dave For This Useful Post:
aardvarcus (10-01-2012)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 10-01-2012, 03:50 PM   #12 (permalink)
Master EcoModder
 
aardvarcus's Avatar
 
Join Date: Apr 2012
Location: Evensville, TN
Posts: 676

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: 237
Thanked 580 Times in 322 Posts
Thank you for your reply. I only was going to slant it to make it a little closer to the template in all dimensions, but I see your point. If I leave the bottom bumper flat up and down, that would direct most of the air striking it to the sides. It is hard to tell from the drawing, but the bumper will curve to match a fairly blunt template side to side.

That leaves the grill block directing all it’s air up and over, and the light covers would be doing a mix of up and over and off to the sides. Should I be trying to make any of those pieces direct the air differently?
  Reply With Quote
Old 10-02-2012, 08:18 PM   #13 (permalink)
ron
Master EcoModder
 
Join Date: Nov 2011
Location: slo county ca.
Posts: 277

double eagles - '99 Dodge ram slt
Team Cummins
90 day: 19.48 mpg (US)
Thanks: 24
Thanked 17 Times in 16 Posts
nice look and should serve both requirements
  Reply With Quote
Old 10-03-2012, 09:02 PM   #14 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,547
Thanks: 7,731
Thanked 8,546 Times in 7,035 Posts
At some point I may be making a curved front bumper for one of my vehicles.

My thought was to cut 1/4" plywood to the height of the bumper and then laminate strips with water-proof glue onto a form until it's ~1" thick. Or two, each 1/2-3/4" thick with a shallower curve behind a deeper one with the ends pinned together. It would be like a giant elliptical spring.

It would be less complex than this:


Last edited by freebeard; 10-03-2012 at 09:06 PM.. Reason: added picture
  Reply With Quote
Reply  Post New Thread


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