Dry filter vs. Oiled - Jeep Commander Forums: Jeep Commander Forum
Intakes Questions or advice about intakes? This is the place...

 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 01-28-2008, 12:50 AM Thread Starter
Senior Member
Points: 7,753, Level: 59 Points: 7,753, Level: 59 Points: 7,753, Level: 59
Level up: 2% Level up: 2% Level up: 2%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: May 2007
Posts: 225
Dry filter vs. Oiled

Is there any cons with a dry performance filter vs an oiled one? Is one better at repeling water, or is it just the slight difference in efficiency?
BigRed is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 01-28-2008, 09:56 AM
Senior Member
Points: 1,471, Level: 21 Points: 1,471, Level: 21 Points: 1,471, Level: 21
Level up: 72% Level up: 72% Level up: 72%
Activity: 0% Activity: 0% Activity: 0%
 
HEMI Commander.'s Avatar
 
Join Date: Jan 2008
Location: Hobart, Indiana
Posts: 163
Ive had nothing but the oiled in the past, mainly K&N and its a bit of a mess when you have to clean it and wait several hours before reinstalling it. Im in the process also trying to choose between the K&N and the dry filter system from AEM. The way it looks to me is that the dry lets more air in and its like which they say like 90% easier to wash. So goodluck

JRods_Inc small classic car parts finder Business
Nothing Huge,but Helps pay for parts for my Cars
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

2007 Jeep HEMI Commander.
Dk Green Metallic

1977 Pontiac Grand Prix
Resto Done for now

1968 Dodge Charger R/T
Under resto with target for completion is SUMMER08

1995 Pontiac Trans Am
LT1 Red and Fun to Drive
HEMI Commander. is offline  
post #3 of 9 (permalink) Old 01-28-2008, 03:45 PM
Member
Points: 2,297, Level: 28 Points: 2,297, Level: 28 Points: 2,297, Level: 28
Level up: 98% Level up: 98% Level up: 98%
Activity: 0% Activity: 0% Activity: 0%
 
webslave's Avatar
 
Join Date: Nov 2007
Location: Clearville, PA
Posts: 64
Don't know the physics of it...maybe I'll look into it, but, I know from experience that most filters designed for "dusty / dirty" conditions are oil type. All the farm tractors I've ever used are oiled, even lawnmowers, for the most part, use an oil type filter. I suspect it is designed to attract and hold dust particles that would normally find their way through a dry type filter. Even my ATVs are oil type...

It is a bit of a bother, but, I always buy a second filter and can swap them out in minutes and then on rainy / cold otherwise useless days, I go hide in the shop and take my time cleaning it...let it dry for a month or two, oil it when I get around to it, etc. Wife can tell me "to go clean your filter" when she's sick of looking at me

Webslave
2008 Hemi Commander 4X4 Limited
webslave is offline  
 
post #4 of 9 (permalink) Old 01-28-2008, 04:27 PM
Member
Points: 3,844, Level: 39 Points: 3,844, Level: 39 Points: 3,844, Level: 39
Level up: 30% Level up: 30% Level up: 30%
Activity: 0% Activity: 0% Activity: 0%
 
Herdfan's Avatar
 
Join Date: May 2007
Location: Huntington, WV
Posts: 46
There is a growing sentiment that the oiled filters are mostly hype, and tend to do more harm than good. There are a couple of ongoing and lively discussions about this on bobistheoilguy.com

Lots of studies say different things, so who knows. I have gone back to the OEM paper elements myself after seeing some of the analysis findings related to silicon in oil due to low restriction air filters.

2007 XK 4.7 Sport (stock for now)
2005 TJ 4.0, intake and exhaust mods, 31's, 2" lift.
Herdfan is offline  
post #5 of 9 (permalink) Old 01-28-2008, 05:04 PM
Senior Member
Points: 1,761, Level: 24 Points: 1,761, Level: 24 Points: 1,761, Level: 24
Level up: 61% Level up: 61% Level up: 61%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Nov 2006
Posts: 126
I got the AEM dry one, and I'm buying into the whole dry over oil since I've had a few k&n's in the past and hated them. For really dusty conditions, you can get a pre-filter for the dry ones, but I didn't find the need for it driving a week in the desert.

Oh yeah, and what did I do when I hit some nasty silt and blew it all into my engine compartment? I took the filter off, kicked it against my shoe a few times, and put it back on - good as new =)

!c
commanderdrone is offline  
post #6 of 9 (permalink) Old 01-29-2008, 01:05 PM
Member
Points: 2,297, Level: 28 Points: 2,297, Level: 28 Points: 2,297, Level: 28
Level up: 98% Level up: 98% Level up: 98%
Activity: 0% Activity: 0% Activity: 0%
 
webslave's Avatar
 
Join Date: Nov 2007
Location: Clearville, PA
Posts: 64
I don't know if they'll fully answer the oil vs. dry question in my lifetime. I certainly didn't intend to start another debate on it

Any "High Performance" filter is high performance by letting more air through. The only way that you let more air through is to increase the size of the air passages. You could increase the size (surface area of the filter), but, there are space limitations underhood and it is really hard to improve upon the total surface area of the paper filters that come OEM. The biggest improvement of the CAI systems is getting rid of the resonator and the convoluted air path.

If you let more air through, you let more contaminants through. Fact. Now, the big thing is the size of the particles and the amount (count). I've never seen a really good analysis of what is OK for an engine... How big / small can the particles be, how many and what time frame for damage to occur? Is .5 micron too big? How about .3? How small before the mass is so insignificant that most of it "blows" through the system without doing damage?

Oiled filters, if done properly, I would think, have the advantage of a "sticky" layer, that, could concievably catch more of the smaller stuff (law of averages, if a .3 micron bounces around in a .5 micron hole going through, it might stick). Can you muck up your engine by over-oiling or not allowing an adequate dry time. Yep. No argument from me on that.

Is the dry more convenient? I would definitely say so. It would flow more air than stock, but, IMHO, let more contaminants through than a properly oiled one. Are the maybe increased levels of contaminents of any consequence? Who knows for sure...not me, and I don't profess to.

I have the time and the technique for doing the oiled filters and have been for lots of years, kinda "natural" to me now, and I've never damaged an engine with them yet. I've had engines fail, don't get me wrong, but, directly traceable to the air filter / type? Nope. My son is still driving my old 96 Caravan with 222,000 miles on it. Doesn't burn maybe 1/2 quart between oil changes (6,000 miles with Amsoil).

Almost any "improvement" you're going to make has trade offs - you have to figure out which ones you want to live with :-) I built high performance engines in the 60's (yeah, I'm old) - they didn't tend to last too long, but, boy would they run! High performance mostly is synonymous with high maintenance It's what I'm used to and I don't mind the time, gave up golf and working on my "toys" is therapy.

BTW, I have a prefilter for my oiled Airaid - yes, I can thump the filter clean in a pinch and the prefilter is water resistant in case I get splash ups.

I hope no one goes off the deep end - I'm explaining the logic I used to the 'fella that was in a quandry For the safety of the world, I hope there aren't too many people that think like I do!

Webslave
2008 Hemi Commander 4X4 Limited
webslave is offline  
post #7 of 9 (permalink) Old 01-29-2008, 03:08 PM
Senior Member
Points: 12,498, Level: 73 Points: 12,498, Level: 73 Points: 12,498, Level: 73
Level up: 12% Level up: 12% Level up: 12%
Activity: 0% Activity: 0% Activity: 0%
 
rwmorrisonjr's Avatar
 
Join Date: Mar 2007
Location: Alexandria, VA
Posts: 2,337
Send a message via AIM to rwmorrisonjr Send a message via MSN to rwmorrisonjr Send a message via Yahoo to rwmorrisonjr
I'm also curious about this topic. I'm using a K&N CAI right now but am not keen on the quality and intake noise as well as where the MAF sensor is relocated to. I saw a picture of someone's 4.7l XK here that was using a dry filter CAI that utilized the factory resonator and only replaced the zip tube and airbox, but didn't notice the make of that kit. I like that idea since it keeps the MAF in the stock location. If someone could post a link to that thread or pic I'd appreciate it.

I also have a TrueFlow filter in my garage for the OEM intake system that I'm thinking about going back to so I can start running regular gas again. Anyone else have experience with the TrueFlow drop-in products?

2006 XK Sport, 4.7l, QTII- many mods
----------------------------------------------------
'An armed society is a polite society. Manners are good when one may have to back up his acts with his life."- Robert A. Heinlein

"Men sleep peacefully in their beds at night because rough men stand ready to do violence on their behalf."- George Orwell



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
rwmorrisonjr is offline  
post #8 of 9 (permalink) Old 01-29-2008, 06:03 PM Thread Starter
Senior Member
Points: 7,753, Level: 59 Points: 7,753, Level: 59 Points: 7,753, Level: 59
Level up: 2% Level up: 2% Level up: 2%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: May 2007
Posts: 225


Is this the one you are talking about? This is what I am looking at getting, its an aFe CAI and they offer it in both a dry filter and an oil filter, and that is why I asked the question.
BigRed is offline  
post #9 of 9 (permalink) Old 01-30-2008, 09:40 AM
Senior Member
Points: 12,498, Level: 73 Points: 12,498, Level: 73 Points: 12,498, Level: 73
Level up: 12% Level up: 12% Level up: 12%
Activity: 0% Activity: 0% Activity: 0%
 
rwmorrisonjr's Avatar
 
Join Date: Mar 2007
Location: Alexandria, VA
Posts: 2,337
Send a message via AIM to rwmorrisonjr Send a message via MSN to rwmorrisonjr Send a message via Yahoo to rwmorrisonjr
BigRed, that's the one, thanks for finding the pic for me. I'll go with the dry one if I get it since I don't want to deal with the oil of a K&N anymore. I also like the air box on the AFE better then the open "box" of the K&N.

Update; Just ordered mine from Autoanything, they're on sale so my total order was $253 shipped.

2006 XK Sport, 4.7l, QTII- many mods
----------------------------------------------------
'An armed society is a polite society. Manners are good when one may have to back up his acts with his life."- Robert A. Heinlein

"Men sleep peacefully in their beds at night because rough men stand ready to do violence on their behalf."- George Orwell



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by rwmorrisonjr; 01-30-2008 at 02:26 PM.
rwmorrisonjr is offline  
Sponsored Links
Advertisement
 
Reply

  Jeep Commander Forums: Jeep Commander Forum > Jeep Commander Discussion > Performance Modifications > Intakes

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Jeep Commander Forums: Jeep Commander Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome