Aero cap construction: 2008 Toyota Tundra pickup - Page 2 - Fuel Economy, Hypermiling, EcoModding News and Forum

MetroMPG · 11-28-2011, 03:27 PM

Good suggestion. Split into new thread.

ChazInMT · 11-28-2011, 06:16 PM

Yeah! Own Thread...I have not seen this till now.

BW, I have to say Good for you for actually making what you have. If you want to make a difference that matters you need to have the shape of your top match the Template Curve.

Vortex Generators are not worth your effort to try and use. Make your cap match the red line. Yes that means having it be 6 inches taller at the Tailgate. Just get rid of any 45° connectors and let the pipe form its own curve. It will be a thing of beauty. (To those of us here in Ecomodder anyway)

The first rendition of your aerocap was an improvement over nothing, but following this template guide will optimize what you can achieve. The Tundra actually has a great start on the aero by having the cab match the template.

Again, Great that you got out and made something, this puts you ahead of 99.99% of the people out there!! I'm sure I speak for most when I say we're proud of what you've done.

Charlie

aerohead · 11-28-2011, 07:23 PM

Quote:

Originally Posted by bdubnelson

I made some alterations this weekend and lowered the middle of the cap. The angles are a little better staying in the teens along the back and hitting 20deg about 2ft from the tail. Over the last foot its about 25deg slope. I'm seeing more turbulence now than before though. I'm considering making some airtabs to help the air diffuse at the tail to lessen wake and turbulence. Anyone else try this?

According to the Big-Dogs,we're not supposed to exceed 22-degrees slope or we're inviting separation and higher drag.VGs would probably help,but you could totally remove the separation with the more gentle slope.
Like what you're doing!

hoover · 11-28-2011, 08:15 PM

I like your cap design, but your schedule 40 pipe looks to me like electrical conduit. If so, this material bends very nice with a heat gun if you do not go to sharp a bend. Too sharp a bend will kink the material, although it does not seem to affect the strength. I used 1 1/2" plastic conduit to form a cab extension for my Silverado and covered it with abs plastic. Still evaluating the value of this mod. A large front air dam built along the same lines has shown definite gains on my truck.