Take off the grill and cut a hole in the plastic suport in front of the air snorkel with a 3 inch hole saw. It gets no outside air in stock form.Truck has more power and a better sound.It takes about 15 minutes good luck.

 

Water injection..that should void the old warranty,eh?

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1999 F250 SD CC, LWB, 5.4L, Auto, 3.73, 4x4, Power TT mirrors w/ marker lights, White, Full Tint, PendaPro SR, Flowmaster Delta 40 series, K&N filtercharger, Superchip (Airbox removed for a second try, maybe in the winter it will be advantagous?) Lund Elite soft tonneau

www.angelfire.com/pa3/spaceace/index.html

 

Right after I got my SD I looked that area over many times thinking that a hole right in front of the snorkle would be great. Sucking rain in at 65 miles an hour turned me off. I determined that there are plenty of open spots to the grill area. There should be enough presure created while driving to provide plenty of fresh air.

 

That was the fist thing i did to the truck when i got it home.Its 2 years old no water problems.
I get your point about the water.