I am new to this forum, and diesel trucks (finally got my first one!), and have appreciated the tips and tricks I have picked up so far. I wanted to give something back, so here goes.
I live in the hot southeast of Texas and believe a "clean radiator is the best performing radiator". Consequnelty I keep radiator bug screens on all of my vehicles. I needed one for our new Powertstroke but didn't find any locally or for a price I would pay. Hence I built one for under $10 dollars and have attached the details. This way I have a custom-fit fine-mesh screen protecting my ride which gives full coverage of all radiator elements, AND I can quickly and cheaply make a new one when needed. (The mesh is substanially smaller than the radiator passages. This may require more frequent inspection or rinsing but it keeps the radiator clean.)
The parts are available from any of the major building centers. I used aluminum screen in a charcoal color so as to not be visible and to handle the engine heat (cost is $6.49 for a roll of 36" x 84"). Six brass grommets were used for mounting holes through which black plastic wraps were used to secure.
Minimal time (less than 30 minutes) is needed to make and install the screen. The attached photos give the build details and some pictures of the result.
I know this is a minor item for a vehicle and not in the league of engine tuning, but I hope it helps keep your ride cool and in peak performance.