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Airflow over the hood at approximately 50 km/h (30 mph) pushes water up the two grooves that run up the length of the hood and keeps it there as long as you keep driving at that speed, accumulating quite an amount of water. When you slow down approaching an intersection, that water starts to run down the grooves as air isn't strong enough to push it up anymore. But since you're still moving, there is still airflow across the front of the truck and up over the front edge of the hood. When that water running down and air flowing over the hood meet, that's when you get the spray right onto the windshield.
This is the reason why I initially installed an OEM Ford hood deflector. I didn't like that it wasn't secured very well at the front edge of the hood and moved a lot under a car wash's air dryer. Then I installed an AVS AeroSkin II (item 436096) and have not had the spray with either one of these products.
Stopped doing it as soon as I installed this as well.
Mine does it. No level and no shutters. I had a '15 that did it as well, same configuration. It's just the design of the truck and how the wind comes over the front end.
The other drawback to the front aero is that I can't run my windshield washer fluid above 50mph because the wind sucks the fluid stream back down to the hood. My '15 did it too.
Airflow over the hood at approximately 50 km/h (30 mph) pushes water up the two grooves that run up the length of the hood and keeps it there as long as you keep driving at that speed, accumulating quite an amount of water. When you slow down approaching an intersection, that water starts to run down the grooves as air isn't strong enough to push it up anymore. But since you're still moving, there is still airflow across the front of the truck and up over the front edge of the hood. When that water running down and air flowing over the hood meet, that's when you get the spray right onto the windshield.
This is the reason why I initially installed an OEM Ford hood deflector. I didn't like that it wasn't secured very well at the front edge of the hood and moved a lot under a car wash's air dryer. Then I installed an AVS AeroSkin II (item 436096) and have not had the spray with either one of these products.
I have thew Weathertech edge protector and when I brake the water that sits in the hood channels runs down and splashes over it and right back on the windshield. in a big splash. good thing for rain x. clears it back up for the next time lol.
Pretty sure that has something to do with the active grill shutters opening or closing from what I have read in the past. Changes the aerodynamics when they change and throws water up on the hood.
Do you have any info on these "active grill shutters" ?
04-26-2018, 09:01 PM
