I leave the window open on the front of the canopy. The one next to the cab. This seems to create some positive pressure in the canopy and keeps most of the dust out. If I close it my canopy is full of dust in a mile. Ive also left a side window vented which works but not quite as good.
Dust doesn't roll up between the cab and bed and go right in?Yes, I should have said the front window. The one between the cab and the canopy. That is the only one I leave open.
Im sure some does but it's a minimal amount. Look at how much dust settles there compared to your back canopy window. I should say that I also tried to seal around my tailgate. I think that is where the majority of the dust comes in.Dust doesn't roll up between the cab and bed and go right in?
This is an excellent idea. Going to try something this weekend. Thanks for the tip.I actually considered marketing this product. I did it to several trucks and it works fantastic. The trick is to pressurize the bed......
-Most all trucks vent the cab out the back of the cab body between box and cab. Put your dash air on high and not on recirculate.
-If you look in between cab and box and feel with hand (can be tight so from below sometimes required) you will see where cab air exhausts. On Chevy and Ford there is a louvered panel on each side approx 3X8 inches.
-The trick is to capture that exhaust and route in to bed. On the Ford there are rubber knock-outs in front of bed that nearly align with these vents. On my Chevy I drilled a 3 inch hole with a hole saw. (If that concerns you find a rubber hole grommet ahead of time and drill that size)
- Now you need to seal between cab and bed. I cut high density foam in a thick picture frame style piece. With some soapy water, a friend, and some long sticks and rods you work it in to position so air is sealed and routes properly. ( my invention I never did was an inflatable bladder. I am thinking a tire rube from a wheelbarrow or something similar would work., needs to seal but flex and stay put)
This works so well you can't believe it. I can't believe a truck manufacturer or aftermarket house has not figured this out. A long weekend of road hunting pheasants and waterfowl here in ND on dry gravel roads would coat all my gear 1/4 deep with dust. After conversion it was perfectly clean.
I also did this on a pull type enclosed trailer with a DC roof fan blowing in. same concept. Positive pressure in the body.
Many ways and materials to skin this cat I am sure...have fun!