Hey guys i want to know yalls opinion on air filters. I run a K&N on my truck but i have heard guys say that oiled filters are bad for the turbos...is this true??? Are dry filters better to use than oiled filters?

 

Oil brands, Air Filters and Religion, they all go hand in hand as far which one will be the biggest argument. Everybody has their own ideas on the subject. The one thing everybody does agree on though is that if you have the K&N drop in replacement filter, it's the worst on the market. I have the full cone type replacement K&N on my truck and have had for almost 200,000 miles and I'm happy with it.

In all the negative things I've heard said about K&N when you force the whole story out it always turns out to be the drop in replacement but everybody always lumps all the K&N's together like that's the only filter they ever made.

 

I'm not a fan of K&N's at all on forced induction engines....that being said i agree with Bubba above. I prefer the Amsoil Ea filters and that is what i run. I do have a homemade air box so I use a cone style with a pre-filter. I'm also kinda lazy and don't like oiling filters. Kenny from Ken's Performance has some good info on the S&B line and they ahve oiled and a non-oiled option for both crowds.

 

All aftermarket oiled filters are in one way or another cause for concern. They all have different levels of concern and different levels of gain. The expression of pay to play is very true here.

A K&N is a great racing filter. If you are doing sled pulls etc. and tear the block down to redo something every other week - then great, do it and get awesome results. If you are like most people any of these filters are problematic because you think you can just leave them be - not true. They require maintenance.

I have run K&N on my dodge and I have run and currently run an AFE Stage 2 with type oiled filter and a prefilter sock on it. I see far more dirt on the inlet of the turbo with the AFE (without the sock) then I ever did with the K&N but with the sock, the AFE lasts me longer between services, is as clean as a whistle at the inlet and sounds really cool.

The newer product out there is impressive, esp. the no oil versions out there now but, also consider that on a new truck this process is yet another opportunity for the dealer to void the warranty. On an older truck this isn't really an issue but dusting a motor still should be a concern.

Just my opinion.

 

There's no substitute for good 'ol paper when it comes to filtration efficiency. All the other stuff is just trying to get more flow from similar sized products by using different materials. Efficiency suffers to some degree in almost every case. Like Wyatt said, if you don't care about getting dirt in the engine, use whatever turns your crank.

Here's how to figure out what your airflow needs really are:

SlowGT > Tech Stuff > Racers Math > Racers Math 2

The stock 3rd Gen filter is rated at 675CFM. That should tell you something.

 

well i would like to find a good filter that will flow good and filter well...i was thanking about an amsoil filter

 

I like my Amsoil Ea filter....it has worked great and my turbo is cleaner than it was with the K&N cone filter.

 

The best filter you can't buy would go somethin like this. It was a post I made in another thread similar to this.

One a these days I'm gonna build me exactly what I want in a filter set up. I like certain elements of a few of them. I want the tube that I have with my K&N because so far it is the cleanest flow tube I have found, I want the complete enclosure housing with the clear top of the S&B and want to attache the AMSOIL filter to the end of it. To provide air flow I want an intake coming from the windshield cowl like the old Scotty's had.

 

That would be the best filter system ever.

 

Sounds good! If you make it ill buy it