I'm planning a modification to my 1998 Toyota Corolla, replacing the stock air intake with something along the lines of forced air induction via a cone air filter. Air will be drawn in to the car with a scoop situated on the bonnet near the windscreen (where the air is at it's highest pressure), brought in to the engine bay along a pipe and in to the air cone filter.
I know that air scoops that sit on the bonnet don't tend to feed air in to air systems like I'm intending to do. They're either cooling down intercoolers or feeding air through to turbos.
What I don't understand though is that, given the position of the air scoop on the body, how do manufacturers deal with water ingress when it's raining? Is it a case that, unless you're driving in near typhoon type of wet weather conditions water ingress doesn't actually matter too much? Or it is a concern and they have a special way to deal with the water?