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Old 04-18-2019, 08:34 PM
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Alternative to oiled air filters?

I see alot of engine compartment pic's here and some of you are running K&N oiled air filters. Especially you guys with V8's. It's my opinion that an oiled filter is ok for hiway driving or mall crawlers but for those that spend their time on farm roads or dusty off road trails or in the desert sand an oiled filter is crap. I won't even put an oiled filter CAI set up on my Diesel truck for hiway driving. With that said I am finishing up my V8 swap into my YJ this spring and I have a 4" diameter air intake. I have a K&N on it now but it has to go. Is there a dry filter that replaces a K&N with a 4" intake that is safe to run in the dirt? I am leaning towards a Volant Powercore filter. Does anyone use this filter and how do you like it? Any other ideas on dry filters?

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Old 04-18-2019, 08:43 PM   #2
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Get a oem ford windstar and put that on the air tube with a good quality paper air filter


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Old 04-18-2019, 08:59 PM
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Please clarify a little for me. Are you talking about a intake housing from a ford windstar van?
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Old 04-18-2019, 09:01 PM   #4
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Alternative to oiled air filters?

Yep

https://www.jeepforum.com/forum/f9/w...1064377/?amp=1

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Old 04-18-2019, 09:13 PM
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That's an interesting idea. I had never seen that before. Thanks for the info Digger84. Not sure if that would be a air intake restriction for a V8 with it necked down to under 3 inches.
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Old 04-19-2019, 01:21 AM   #6
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Well in regards to oiled air filter- to each their own. I live on country roads & live in the country. I prefer K&N filters bc they filter better & Oil repels water vs paper filters soaks up water. And I don’t have to replace it. Just clean, rinse, re-oil.
However,
A trick that many use is an outerwear.
An old school trick was panty hose over the air filter.
It gets dirty, pull it off, throw on another. Works like a charm.
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Old 04-19-2019, 05:21 AM   #7
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You are correct about not using a K&N for dirty/dusty conditions. They allow a lot more dirt into your engine. I have a Donaldson/Volant clamp on filter on my 4.0. It works great.
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Old 04-19-2019, 06:17 AM   #8
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K and N grit passer do NOT filter close to as well as paper

Just run one for awhile then remove and wipe finger on air tube to feel the grit it passes






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Old 04-19-2019, 08:27 AM   #9
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Look closer the 3 to 4 inch elbow has the 4 inch end attached to the Windstar air cleaner housing so no neck down from 4 inch needed


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Old 04-19-2019, 11:09 AM   #10
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I don't know if anyone has noticed, but the stock 4.2 YJ air induction system is a CAI intake with a large paper filter.
The Windstar air intake is interesting because it gets the intake opening up higher and away from water intrusion that might happen during a stream crossing.

Scroll down a bit to the similar threads and read a few. Some good reading.

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Old 04-19-2019, 11:22 AM   #11
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Check AEM dry cone filters. Sizing here: https://www.aemintakes.com/mobile/univcone.aspx

I was using an oiled Volant filter from the PO, and it was fairly new. Ran a used oil analysis and found very high silicon.

These AEMs have good silicon numbers in used oil analysis in my searches on the bitog oil site. But I haven't personally run an analysis yet. I did indeed find a fine coating of powder inside the intake downstream from the Volant. Never again will I use oiled. I was even over oiled a bit since the Volant applicator bottle is poorly designed in that regard.

These AEMs are washable. I might have opted for a simple paper cone filter had I been able to find one. I wasn't looking for a reusable.
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Old 04-19-2019, 05:34 PM   #12
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Haven't done the Windstar mod on either of my Jeeps. But, I will say this, haven't had any problems with water intake and yes, I do ford rivers (look at my avatar). If you ease into the water and keep the fenders above the water line you will have no problems. If you're in water that's going to get into the intake there's a lot more that needs to be done to protect your rig.

It's also been proven many times that a stock style paper filter will clean the air so much better than any oiled filter. There have been many debates with tests and facts shown that this just the truth.
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Old 04-19-2019, 06:04 PM
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Thanks guys for the responses. The AEM products look like exactly what I am looking for.
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Old 04-20-2019, 01:25 PM   #14
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Hmmm interesting discussion.
I’m kind of wondering if any filter works now lol.
Maybe just remove it entirely?
(Joking obviously don’t go w/o a filter. For those that might miss the joke.)
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Old 04-20-2019, 06:53 PM   #15
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I like the paper over oil, never have to worry if its clean or needs cleaned, I just replace it every 6 mos. or so with Plugs, Oil, Filters, whether they need it or not. Beauty of the simple stuff is it's under $50 for everything, an Hour in the shop, Cheaper than jiffy lube etc.
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Old 04-20-2019, 09:01 PM   #16
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I don’t fault ya. It’s hard to pass up quick, easy & cheap when it comes to maintenance.
I know a guy that runs 3 air filters on his Chevy.
But I think it comes down to picking your battles really. There’s no such thing as filters that block ALL particulates.
Dirt is going to get in your engine- regardless of what you run.
Can an oiled filter ruin sensors? Sure. If you don’t understand or follow directions & over oil it.
All i run on my atv’s, mx bikes in the dunes is K&N with an outerwear- never had a problem. And sand is awful for machines.
So I’ll stick with what works for me. Run what you like & enjoy the ride
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Old 04-21-2019, 06:58 PM   #17
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for the record, that windstar air intake thread above is for a tj. I have not found a way to work that for a YJ. That being said I have only half heartedly looked at it.
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Old 04-24-2019, 10:23 AM   #18
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Way back in the early 70s, K & N came up with the oiled gauze filter for VW engines running off road. A huge improvement on the original oil bath unit. And didnt plug up like the dry filters available at the time. Had one on my bug.
I remember a test done on them back then and they actually worked better when covered in oily dirt than when freshly cleaned and oiled. Which is counterintuitive for most of us.
That said a dry paper filter provides better filtration, the best around 10 microns.

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