How are those different than K&N?
And why the heck don't they post a flow rating???? Or at least a surface area? I guess you're just supposed to pick the one you think looks the coolest and go from there?
I run teh amsoil filters as well, Huge difference between them and K&N, as the Amsoil filters dont let crap into your engine. The element is designed to trap particles at different layers instead of just at the surface, so it doesnt quickly clog HOWEVER it is not a super free flowing air filter by any stretch of the imagination, these things are designed to keep your engine the cleanest possible, and that they do. If running synthetics with extended drain intervals, letting dirt in through your air intake is the fastest way to shorten the life of your oil. Running the best air filtration possible is the best insurance that you are going to be able to keep that high dollar oil in there as long as possible. If you are running a turbo, it is going to pull all the air through the filter that you could ever use, so sticking something on your engine that is not much more than a window screen to try to get more power, is really a waste
Realistically, I noticed that the k&N that I had that trashed my turbo allowed for a very slightly quicker spool up. So I did some head to head comparing to see how it acted in other ways , and also noticed that with the K&N my blowby oil consumption went WAY up . Aparantly when you get an air filter that has too little restriction, you mess up the function of the CDR and make it basically a paperweigh( the CDR depends on a certain amount of vacuum to balance it out and help scavange blowby gasses, if its not there, you have a problem as pressure will build to a point to where oil starts belching out )t. With the Amsoil filter oil consumption is very minimal ( top off every 5000 miles ) so a slight bit of whistle VS multiple excess quarts of oil consumed. Kind of a no brainer.
While Im not a huge fan of open cone fllters on diesel engines without an enclosed water shedding housing, if someone wanted to use one of the cone style, they just need to measure the surface area of the stock turbo filter, then look through the catalog at cone filters with the pipe diameter they need and start calculating the filter surface area on those filters until yoiu find one with as much surface area as the original filter Dont go bonzo or you'll wind up with too little restriction and , oil consumption issues. These filters primarily are concerned with cleaning. They filter down to .8micron and filter out 50 times more dust than a K&n, thats a heck of a lot of turbo and ring damage, although not a striking amount more than a paper filter, but they do flow more evenly than a paper, since a paper filter will clog across the surface and build excess restriction quickly and a nanofiber filter takes a very long time for the element to evenly fill up, and when it finally does, you just take it off, fire up the air compressor on low pressure and blow it off, and poke it back in, no washing, no oiling. Nice and simple. I can even clean mine with my onboard air in a truckstop parking lot.
