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Originally Posted by JohnA
...just stick it in front of a strong light and you'll see what I mean!
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There're holes everywhere, yes, but that's the way it works!
According to K&N, the filtering is not done by "blocking" the particles, but adhering them by the oil & the thin thread end splits. So you always need oil in such filter. (and do not use them after 20 times of cleaning, at that time, those thin hairs are mostly gone)
I've been using K&N for years without filtering problem. Yes indeed, it's not that clean as the stock paper filter can provide, but very close. And it out performs a lot in flow.
Let's admit it, those obvious radial traces on the blades can only be made by "fluid", not "particles" from bad filtering. Marks by particle impacts should look like dots (think sand blasting), not lines. Because they are always bouncing around when contacting solid surfaces. Fluid would mostly stay on the surface & flow down, that makes line marks.
I know the corroded blades in the picture is scaring (to some at least), but I absolutely hope to see other's successful results. (And actually I'm still using this same turbo now & it seems OK. )
I remember Larry had used pre-compressor injection for quite a while & the condition of his turbo was far better then mine.
About the jet location we were talking over a lot previously, I have a reverse idea that maybe getting the jet(s) further upstream would be better.
Why? Simple, droplets have more time to evaporate before touching the blades, and evaporation makes them smaller. As to the water which gathers on the inner wall, I can only guess the issue would be minor. Also as mentioned, there's always a step in the turbo inlet.
My pre-compressor jet was quite close to the blade, about only 8" far. It was located in the elbow and mosly "aimed" at the blade. In contrast, Larry's jet is further upstream, and injects vertically to the flow.....
That's what I'm thinking....