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Partial tonneau!?
I really wanted to cover my bed, but because of time and cost and designing it to work for everything I do (hauling firewood, plywood, drywall, etc.) I knew I wasn't going to get it done this year. Winter is approaching and I needed somewhere to put my sons pack and play, diaper bag and other things, and groceries. I was studying that chart that's floating around here comparing aerodynamic improvements for pickups and figured I could build a box to keep things in to act as my partial tonneau and then I just need to add a wing. The box is built and has been on for a full tank. I still need to cover it with bed liner and seal up some gaps. My mpg dropped a little for this tank, but I believe it was because I didn't control my foot as well as the last tank, and there was a day I warmed the engine up and lost about 0.3 mpg off my average at the time. Also the tank before this was my best tank ever, so not a really great comparison. When it's completely finished I might get around to doing actual tests with and without the box/tonneau (it just lifts out of the bed)
I'm considering a kammback/cab extension instead of the simple wing. So, question is how far back do I take the extension?
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