The straw analogy doesn't make any sense. You would have to be parked in a puddle a foot deep for that to happen. That's the only way those bypass valves will work anyhow. It's more like when you are at the bottom of your coke and trying to suck out the last few drops. I don't understand what kind of damage actually occurs with a CAI and water, specifically driving in rain. I'm familiar with what water does to engines. But most guys that run their trucks though water and mud pits don't do anything special. Guys that ford through rivers will use snorkels. I've talked to guys that intentionally soak their air filters in water for the purpose of dropping intake temps for drag racing. We all know of water injection systems which intentionally inject water into the engine. Water injection is not new technology.
What's the real issue in our cars? Possible water drops on the MAF messing up A/F ratios to the point it won't run. The intake is a few inches in diameter. The only thing getting into the engine is water drops, unless the car is drowned. I wonder how well a thoroughly soaked filter breathes? If the engine can't get air it won't run either.
I don't have a CAI on my car at this point. I plan to make one this summer.
What does allowing the filter to get wet do to the filtering capabilities? Seems to me you'd suck all the dirt caught in the filter right through. Dirt in the engine, nice clean filter? I guess that's one way to wash it.
97 328iS, Manual, Stock