I found this site a week ago. I'm trying to get everything I can out of my F150 for fuel mileage. I bought an Ultra Gauge last week, and it works great. It sure changed my driving habits.
So, the first thing I did was use the template on this site to get an idea of the shape of the lid. Printed that out, scaled some dimensions from the print, and proceeded to cut the shape out of 1/2 inch plywood. I laid a rather rigid garden hose on the plywood to get the rounded shape. I used other scrap wood to stiffen up the frame. Two hours later, it was done. I really liked how the transition from the top of the cab to the lid turned out, appears to match the cab lines perfectly. I've heard most guys will have a radius from the top of the lid to the sides, but that would have been a lot more figuring and cutting. I plan on filling in the gaps in the plywood with something, and then of course painting it.
I'm getting right around 18.7mpg with the truck, which apparently is pretty good for this model. I'll drive around this coming week for work, and check numbers. My goal is to get over 20mpg.
Feedback, good or bad, is welcome.
