To K&N or not to K&N - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 11-15-2011, 11:40 AM   #1
Jeeper
 
Al Nebular's Avatar
 
Join Date: Sep 2011
Location: N. Delaware
Posts: 80
To K&N or not to K&N

OK, here we go....I'm sure there will be a lot of comments.

What is your opinion on adding a K&N replacement filter (not the CAI) to the new Wrangler w/the Pentastar motor?

I've heard that the decal alone adds almost 5 HP.

__________________
2012 JK Sport S
Al Nebular is offline   Quote Quick Reply
Old 11-15-2011, 12:04 PM   #2
Ex Navy man
 
rics1997's Avatar
 
Join Date: Oct 2010
Location: Bristol, Tn
Posts: 4,767
Just put on the decal, lol. I stayed away from K&N because it didn't get great reviews in the Jeep Community. K&N is said to allow way too much dirt in and since Jeeps love dirt, it doesn't make for a great combination. Saying that, never used one so my only knowledge is hearsay.

__________________
2010 Dark Charcoal Pearl Jeep Wrangler Sport S Automatic
4.88 Yukon w/Trac-Lok rear and Eaton ELocker Front - Synergy Gussets - B&M 70264 Trans Cooler
BDS 3" lift - BDS Fox 2.0 Racing Shocks
XHD front Bumper - Trektop NX - Goodyear MT/R w/Kevlar 35X12.5X15 on MB Chaos 5 Wheels - Thrush Turbo Muffler

Become a WranglerForum Supporting Member!
rics1997 is offline   Quote Quick Reply
Old 11-15-2011, 12:11 PM   #3
Jeeper
 
Xnewyorka's Avatar
 
Join Date: Oct 2011
Location: North Carolina
Posts: 280
I just took mine out...waste of money and didn't see any benefit. I was worried also I was letting too much 'junk' in to my intake. Went with a Fram 10348 instead.
__________________
'11 JKUR Sahara Tan

Attention - WF may cause excessive desire for modifications
-Ben
Xnewyorka is offline   Quote Quick Reply
Old 11-15-2011, 12:13 PM   #4
..shall not be infringed!

WF Supporting Member
 
Up Hill Bill's Avatar
 
Join Date: Jun 2011
Location: Up the hill, CA Northcoast
Posts: 4,284
I wouldn't take a free K&N filter, none the less pay for it. Worse than a waste of money. I had repeated O2 sensor failure due to K&N filter: put in K&N filter....Five (5) failed O2 sensors in 15K miles... took out K&N filter... no more O2 sensor trouble for 40K miles!

The company took a sensor, saying they would send it to a lab to test it to see if oil from their filter was responsible. They then denied that they had my sensor or ever said they could/would test it.

Terrible company, terrible product! But, that's just my opinion.....
__________________
2012 JKU Rubicon
Sahara Tan
Auto
3.73


Up Hill Bill
Up Hill Bill is offline   Quote Quick Reply
Old 11-15-2011, 12:19 PM   #5
Jeeper
 
Kelsey73's Avatar
 
Join Date: Jul 2011
Posts: 1,258
I think I'm going to try one for my highway runs and keep a good old fashioned paper one on hand for when things get dirty.

I will be driving over the same route twice in the next 2 weeks. Basically going to do one with and one without to see how they differ. I probably wasted my $30 but I've seen this debated to no end I figured i'd see for myself.
__________________
2012 Wrangler Unlimited Sahara- Bright White
Kelsey73 is offline   Quote Quick Reply
Old 11-15-2011, 12:20 PM   #6
Jeeper
 
Join Date: Mar 2011
Location: NH
Posts: 283
Waste of money IMO. I've had them on three vehicles.
44Blues is offline   Quote Quick Reply
Old 11-15-2011, 12:39 PM   #7
Jeeper
 
Join Date: Jul 2011
Location: Broken Arrow, OK
Posts: 2,305
K&N filters suck. If you want a high flow filter there are better options available. None of them will help your mileage or power either, but at least they will filter the air as it passes through them.
__________________
2012 Silver Sport S, Silver, 6 speed, soft top, 3.73s, LSD, PCG, Infiniti, deep tint windows, Pro Comp 1028 wheels, 33" Duratracs, Smittybilt bumpers and steps, KC fog lights, Mopar slush mats and fuel door.

Happiness is a belt fed weapon.
oilwell1415 is offline   Quote Quick Reply
Old 11-15-2011, 12:42 PM   #8
Jeeper
 
jleito26's Avatar
 
Join Date: Aug 2011
Location: Dutchess County
Posts: 47
Images: 3
I just pulled mine out also and put the stock box back in with a Fram filter and already noticed a huge difference from the K&N.
__________________
This is my TJ. There are many like it, but this one is mine. My TJ is my best friend. It is my life. I must master it as I must master my life

jleito26 is offline   Quote Quick Reply
Old 11-15-2011, 12:45 PM   #9
Jeeper
 
Mr Mac's Avatar
 
Join Date: Nov 2011
Location: Vancouver, WA
Posts: 2,603
Images: 18
Pretty well unanimous. The K&N is fine for the motorcycles and hot rods that don't play in the dirt, but they do tend to clog even on the street! I can't imagine how clogged they must get off-road!
__________________
But the wisdom that is from above is first pure, then peaceable, gentle, and easy to be intreated, full of mercy and good fruits, without partiality, and without hypocrisy. James 3:17 (KJV)


Mr Mac is offline   Quote Quick Reply
Old 11-15-2011, 12:45 PM   #10
Jeeper
 
obidya's Avatar
 
Join Date: Sep 2011
Location: Fort Wayne, Indiana
Posts: 1,502
First off...
I have been using different variations of different K&N air filters in different cars trucks and jeeps for nearly 14 years. (wow that made me feel old..)

moving on

90% of the time you will either see minor HP gain or none at all. Thats the advertised advantage of the K&N not the real one. What I have noticed in my experience is two main things, Increased fuel economy and Increased engine response.

I have never had any issues with mass air flow sensors or O2 sensors like a lot of people have claimed.
(not to say those issues don't exist or that the K&N did not cause them.. I have no idea and its possible, especially with an oiled filter.)

I am currently running a K&N FIPK cold air intake system on my 97 Sahara and am getting around 20mpg, I have notice it is much peppier on the low end than other wranglers I've driven and its very responsive. As far as extra power and whatnot.. I guess its possible? but the power band they advertise is usually in the higher RMS and I don't drive there.. its a wrangler.

personal examples:

the most impressive boost I've seen with a K&N was in my '83 Porsche 944, I just used a drop in air filter in the stock box and holy cow was it noticeable. Not sure if it helped the fuel economy.. I had the tendency to drive hard and fast. In this car the extra power was noticeable, possibly because I DID have a lot of driving time in the higher RMP range.

the least impressive reaction was in the wife's '08 Hyundai Sonata, I didn't notice anything and in fact the gas mileage seemed to get slightly worse.

In my '93 Grand Cherokee it gave me an extra 3 mpg and considering it was only getting 11, it was a big deal to me.

In my '88 F150 I saw an extra 3-5 mpg but not really anything as far as power.

I had an '89 Toyota Celica GTS, I saw both power and efficiency in this car. I gained 5mpg and it helped the engine idle and throttle response.

This is just my opinion based on my own personal experiences. I would recommend K&N and will continue using them in my vehicles.
__________________
Black 97 Sahara 4.0L 5 Speed - Fully Cloak'd
1.75" BL with 35"x12.5" Wrangler MTR w/ Kevlar 10k Engo winch
obidya is offline   Quote Quick Reply
Old 11-15-2011, 02:29 PM   #11
Jeeper
 
cu in oz's Avatar
 
Join Date: Aug 2011
Location: South Coast of Massachusetts
Posts: 614
I've run K&N's in my vehicles and I have one now in my '11 JK. I don't play in the dirt as many of you do, so I don't have that concern.

This is my first JEEP, so I will keep an open mind but I never had an issue in other vehicles. MHO only here.

The biggest gain I saw was with my Supercharged Nissan with a K&N CIA, THAT made some power. This I fully realize is a totally different kettel of soup.
__________________
'11 Sahara Tan Sport "S" H/T 6spd
cu in oz is offline   Quote Quick Reply
Old 11-16-2011, 01:38 AM   #12
Jeeper
 
TXJKU-Rubi's Avatar
 
Join Date: Sep 2011
Location: Friendswood, TX
Posts: 147
Quote:
Originally Posted by Up Hill Bill View Post
I wouldn't take a free K&N filter, none the less pay for it. Worse than a waste of money. I had repeated O2 sensor failure due to K&N filter: put in K&N filter....Five (5) failed O2 sensors in 15K miles... took out K&N filter... no more O2 sensor trouble for 40K miles!

The company took a sensor, saying they would send it to a lab to test it to see if oil from their filter was responsible. They then denied that they had my sensor or ever said they could/would test it.

Terrible company, terrible product! But, that's just my opinion.....
I agree, as many already have but WOW, what a story. They just denied having your sensor?? That's crazy
TXJKU-Rubi is offline   Quote Quick Reply
Old 11-16-2011, 05:19 AM   #13
Jeeper

WF Supporting Member
 
AMangum's Avatar
 
Join Date: Aug 2011
Location: Near Salt Lake City, UT
Posts: 289
Images: 1
Quote:
Originally Posted by obidya
First off...
I have been using different variations of different K&N air filters in different cars trucks and jeeps for nearly 14 years. (wow that made me feel old..)

moving on

90% of the time you will either see minor HP gain or none at all. Thats the advertised advantage of the K&N not the real one. What I have noticed in my experience is two main things, Increased fuel economy and Increased engine response.

I have never had any issues with mass air flow sensors or O2 sensors like a lot of people have claimed.
(not to say those issues don't exist or that the K&N did not cause them.. I have no idea and its possible, especially with an oiled filter.)

I am currently running a K&N FIPK cold air intake system on my 97 Sahara and am getting around 20mpg, I have notice it is much peppier on the low end than other wranglers I've driven and its very responsive. As far as extra power and whatnot.. I guess its possible? but the power band they advertise is usually in the higher RMS and I don't drive there.. its a wrangler.

personal examples:

the most impressive boost I've seen with a K&N was in my '83 Porsche 944, I just used a drop in air filter in the stock box and holy cow was it noticeable. Not sure if it helped the fuel economy.. I had the tendency to drive hard and fast. In this car the extra power was noticeable, possibly because I DID have a lot of driving time in the higher RMP range.

the least impressive reaction was in the wife's '08 Hyundai Sonata, I didn't notice anything and in fact the gas mileage seemed to get slightly worse.

In my '93 Grand Cherokee it gave me an extra 3 mpg and considering it was only getting 11, it was a big deal to me.

In my '88 F150 I saw an extra 3-5 mpg but not really anything as far as power.

I had an '89 Toyota Celica GTS, I saw both power and efficiency in this car. I gained 5mpg and it helped the engine idle and throttle response.

This is just my opinion based on my own personal experiences. I would recommend K&N and will continue using them in my vehicles.
What metric are you using to get these numbers I wonder? Are you doing any kind of strict testing procedure with controls to ensure the numbers you are reporting are scientifically accurate or are you just tossing out arbitrary stats based on your perceptions? Did you dyno using both filters on each vehicle to get your power comparisons? Did you run a static test track under identical conditions where you precisely measured fuel consumption with each vehicle using each filter? Short of forced air induction or a paper filter that is severely obstructed, the differences in normal aspiration between the two filters could not reasonably account for such differences.

My point is that people's perception of something often does not line up with reality and that's fine if you want to think the K&N filters are doing for you what you claim, but pushing those hard numbers as factual results and then tossing in the disclaimer at the end that those are just opinion based is disingenuous at best when there is no testing method behind those numbers. The variance in MPG you state could easily be attributed to a large number of factors and unless you tested with controls in place to ensure accurate results, even something as small as if you were driving into the wind as opposed to with the wind, those numbers are then suspect and could easily be skewed by such variances.
AMangum is offline   Quote Quick Reply
Old 11-16-2011, 07:34 AM   #14
Official WF thread de-railer
 
Mr. Sinister's Avatar
 
Join Date: Jul 2010
Location: Fair Hill, Maryland
Posts: 3,702
More airflow = more dirt allowed past.
Enough to notice over the life of your engine? Depends on the driving you do. In my Jeep, I'd never run one, because I run in a lot of fine dust, which is exactly what a oiled gauze filter can't stop.
On my old 5.0 Mustangs, I always ran one. Both panel filters with the stock airbox, and conical filters with CAI style setups. What I found with both was after several thousand miles, there was a gritty, oily buildup on the inside of the inlet tube, and all the way up to the throttle body, and even inside the intake runners. So it stands to reason that some of that dirt is making it into the cylinders. These cars never saw dusty environments, so this was all picked up from street driving.
On my current 55 Chevy, I run a K&N with a filter media lid, because I want maximum airflow. It never sees dusty environments. So far the carb and the intake runners have been free of that gritty film I talked about.
__________________
My battle with Chrysler over getting my Jeep repaired under warranty: http://www.wranglerforum.com/f33/ins...ml#post3467156
Mr. Sinister is offline   Quote Quick Reply
Old 11-16-2011, 07:40 AM   #15
Jeeper
 
obidya's Avatar
 
Join Date: Sep 2011
Location: Fort Wayne, Indiana
Posts: 1,502
Quote:
Originally Posted by AMangum View Post
What metric are you using to get these numbers I wonder? Are you doing any kind of strict testing procedure with controls to ensure the numbers you are reporting are scientifically accurate or are you just tossing out arbitrary stats based on your perceptions? Did you dyno using both filters on each vehicle to get your power comparisons? Did you run a static test track under identical conditions where you precisely measured fuel consumption with each vehicle using each filter? Short of forced air induction or a paper filter that is severely obstructed, the differences in normal aspiration between the two filters could not reasonably account for such differences.

My point is that people's perception of something often does not line up with reality and that's fine if you want to think the K&N filters are doing for you what you claim, but pushing those hard numbers as factual results and then tossing in the disclaimer at the end that those are just opinion based is disingenuous at best when there is no testing method behind those numbers. The variance in MPG you state could easily be attributed to a large number of factors and unless you tested with controls in place to ensure accurate results, even something as small as if you were driving into the wind as opposed to with the wind, those numbers are then suspect and could easily be skewed by such variances.
The only hard number I gave was the MPG, I tested this by keeping a strict eye on the vehicles mileage with a clean stock air filter. Usually I do a month of normal driving and note the conditions and averages. Then I do another month with the K&N and once again pay strict attention to performance and mpg as well as driving conditions. Then I compare the averages to see what if any kind of gains I saw. I did in fact dismiss environmental helpers when determining the outcome, for instance, the Grand Cherokee traveling with the wind and drafting semi's could average 26mpg.. which is all well and good but not a part of my overall assessment of the air filter.

I also mentioned "feeling" a difference in throttle response. Some cars you do, some you don't. I don't have any strict scientific facts to back up what I've noticed in response, because I've never really cared enough to Dyno the difference in air filters. I would love to see the raw data you have collected.
__________________
Black 97 Sahara 4.0L 5 Speed - Fully Cloak'd
1.75" BL with 35"x12.5" Wrangler MTR w/ Kevlar 10k Engo winch
obidya is offline   Quote Quick Reply
Old 11-16-2011, 07:51 AM   #16
Jeeper
 
obidya's Avatar
 
Join Date: Sep 2011
Location: Fort Wayne, Indiana
Posts: 1,502
Quote:
Originally Posted by Mr. Sinister View Post
More airflow = more dirt allowed past.
Enough to notice over the life of your engine? Depends on the driving you do. In my Jeep, I'd never run one, because I run in a lot of fine dust, which is exactly what a oiled gauze filter can't stop.
On my old 5.0 Mustangs, I always ran one. Both panel filters with the stock airbox, and conical filters with CAI style setups. What I found with both was after several thousand miles, there was a gritty, oily buildup on the inside of the inlet tube, and all the way up to the throttle body, and even inside the intake runners. So it stands to reason that some of that dirt is making it into the cylinders. These cars never saw dusty environments, so this was all picked up from street driving.
On my current 55 Chevy, I run a K&N with a filter media lid, because I want maximum airflow. It never sees dusty environments. So far the carb and the intake runners have been free of that gritty film I talked about.
I do agree with you, and dust is a concern of mine. This is the first time Ive had a full cone system on something that goes off road. I pulled the intake off when I bought it and again a month later to check for film and debris inside the intake tube and to inspect the throttle body. I will be pulling it off again on my next oil change just out of paranoia but so far its been nice and clean. I do have a dust cover for the cone that I use often so maybe thats helping.
__________________
Black 97 Sahara 4.0L 5 Speed - Fully Cloak'd
1.75" BL with 35"x12.5" Wrangler MTR w/ Kevlar 10k Engo winch
obidya is offline   Quote Quick Reply
Old 11-16-2011, 11:16 AM   #17
Jeeper
 
Join Date: Sep 2011
Location: Tucson, AZ
Posts: 140
I took mine off because I got tired of cleaning and oiling it. With OEM type filter you just put it in and go. For some I guess that is not much trouble. I used to do all my own stuff, but now at 71 I have someone else do it.
------------------
92 YJ Sahara
08 JKUR
12 JKR
azyjjk is offline   Quote Quick Reply
Old 11-16-2011, 09:25 PM   #18
Jeeper
 
20YearProject's Avatar
 
Join Date: Jul 2011
Location: Bismarck, ND
Posts: 82
Fantastic advertising. Great hype. Questionable product. Bad idea.

Not many would disagree that an engine wants and runs better with cleaner air.

Now lets take a paper product, douse it in oil and place it directly in the path of air flow in front of mechanical components that prefer clean air. Over time, the oil is going to coat and move down the air intake path. Soon that oil will make it to components of the intake you do not want coated with oil. From there, your engine performance goes down hill.
20YearProject is offline   Quote Quick Reply
Old 11-16-2011, 09:31 PM   #19
Jeeper
 
silvrevo's Avatar
 
Join Date: Mar 2009
Location: Nebraska
Posts: 916
Ate drop in
__________________
'12 JK
'11 ZX-10r abs
silvrevo is offline   Quote Quick Reply
Old 11-17-2011, 05:27 AM   #20
Jeeper
 
OH9JK's Avatar
 
Join Date: Oct 2011
Location: Graham, NC
Posts: 738
Quote:
Originally Posted by 20YearProject
Fantastic advertising. Great hype. Questionable product. Bad idea.

Not many would disagree that an engine wants and runs better with cleaner air.

Now lets take a paper product, douse it in oil and place it directly in the path of air flow in front of mechanical components that prefer clean air. Over time, the oil is going to coat and move down the air intake path. Soon that oil will make it to components of the intake you do not want coated with oil. From there, your engine performance goes down hill.
Well said!!
__________________
Crowded elevators smell different to midgets.
OH9JK is offline   Quote Quick Reply
Old 11-17-2011, 06:36 AM   #21
Jeeper
 
Join Date: Aug 2011
Location: s/e texas
Posts: 87
i put one in my 08 a couple of weeks ago. i dont really pay much attention to fuel economy, but i def did notice throttle response. it wasnt anything major, but it was def noticable.

to be honest i never thought about the offroad dirt / dust issue. glad you all brought it up. i may do like some of you and have a different filter for when i go trail riding.
damon.l is offline   Quote Quick Reply
Old 11-17-2011, 07:13 AM   #22
MallCrawler

WF Supporting Member
::WF Moderator::
 
kjeeper10's Avatar
 
Join Date: Feb 2011
Location: Connecticut
Posts: 33,785
Quote:
Originally Posted by damon.l
i put one in my 08 a couple of weeks ago. i dont really pay much attention to fuel economy, but i def did notice throttle response. it wasnt anything major, but it was def noticable.

to be honest i never thought about the offroad dirt / dust issue. glad you all brought it up. i may do like some of you and have a different filter for when i go trail riding.
Same here- no difference on throttle response. Seems everybody has different opinions. If anything a little more pull at 3000-4000 rpms. I installed my Banks CAI at about the same time "winter gas" hit the
pumps. My mileage has stayed the same.
I bought my set up used and I'm actually going to look for a dry cone filter to replace the K&N that Banks uses.
__________________
2007 Rubicon/Rock Krawler TR 2.5 coils/rear TB/Rancho 9000 31/32XL shocks/Teraflex monster TB/Synergy highsteer,tie rod, ball joints/Hankook MT 315-75-16 on Level 8 ZX's/MC front SB links/Rancho geo brackets & shocks/Fox ATS stabilizer/Adams front DS/Artec front armor w/ Currie upper bushings=Frankinjeep from hell.

Lifting your JK? Read this!!



Click HERE to become a WranglerForum Supporting Member!
kjeeper10 is online now   Quote Quick Reply
Old 11-17-2011, 07:18 AM   #23
Ex Navy man
 
rics1997's Avatar
 
Join Date: Oct 2010
Location: Bristol, Tn
Posts: 4,767
Filters or CAI will not increase gas mileage in newer model computer controlled vehicles. I had an article on this a while back but can't find it right now but even filter manufacturers will tell you this. They can possibly help a very little with throttle response and hp but can not improve gas mileage. Go figure.
__________________
2010 Dark Charcoal Pearl Jeep Wrangler Sport S Automatic
4.88 Yukon w/Trac-Lok rear and Eaton ELocker Front - Synergy Gussets - B&M 70264 Trans Cooler
BDS 3" lift - BDS Fox 2.0 Racing Shocks
XHD front Bumper - Trektop NX - Goodyear MT/R w/Kevlar 35X12.5X15 on MB Chaos 5 Wheels - Thrush Turbo Muffler

Become a WranglerForum Supporting Member!
rics1997 is offline   Quote Quick Reply
Old 11-17-2011, 07:23 AM   #24
Jeeper
 
Overtrained's Avatar
 
Join Date: Jul 2009
Location: Seaford- New York
Posts: 259
Are you guys soaking the filters overnight in a barrel of filter oil? It's supposed to be a very light coat!
Overtrained is offline   Quote Quick Reply
Old 11-17-2011, 07:39 AM   #25
MallCrawler

WF Supporting Member
::WF Moderator::
 
kjeeper10's Avatar
 
Join Date: Feb 2011
Location: Connecticut
Posts: 33,785
Quote:
Originally Posted by Overtrained
Are you guys soaking the filters overnight in a barrel of filter oil? It's supposed to be a very light coat!
__________________
2007 Rubicon/Rock Krawler TR 2.5 coils/rear TB/Rancho 9000 31/32XL shocks/Teraflex monster TB/Synergy highsteer,tie rod, ball joints/Hankook MT 315-75-16 on Level 8 ZX's/MC front SB links/Rancho geo brackets & shocks/Fox ATS stabilizer/Adams front DS/Artec front armor w/ Currie upper bushings=Frankinjeep from hell.

Lifting your JK? Read this!!



Click HERE to become a WranglerForum Supporting Member!
kjeeper10 is online now   Quote Quick Reply
Old 11-17-2011, 07:42 AM   #26
MallCrawler

WF Supporting Member
::WF Moderator::
 
kjeeper10's Avatar
 
Join Date: Feb 2011
Location: Connecticut
Posts: 33,785
Quote:
Originally Posted by rics1997
Filters or CAI will not increase gas mileage in newer model computer controlled vehicles. I had an article on this a while back but can't find it right now but even filter manufacturers will tell you this. They can possibly help a very little with throttle response and hp but can not improve gas mileage. Go figure.
MPG and HP from what I understand
__________________
2007 Rubicon/Rock Krawler TR 2.5 coils/rear TB/Rancho 9000 31/32XL shocks/Teraflex monster TB/Synergy highsteer,tie rod, ball joints/Hankook MT 315-75-16 on Level 8 ZX's/MC front SB links/Rancho geo brackets & shocks/Fox ATS stabilizer/Adams front DS/Artec front armor w/ Currie upper bushings=Frankinjeep from hell.

Lifting your JK? Read this!!



Click HERE to become a WranglerForum Supporting Member!
kjeeper10 is online now   Quote Quick Reply
Old 11-17-2011, 08:20 AM   #27
Jeeper
 
obidya's Avatar
 
Join Date: Sep 2011
Location: Fort Wayne, Indiana
Posts: 1,502
Quote:
Originally Posted by Overtrained View Post
Are you guys soaking the filters overnight in a barrel of filter oil? It's supposed to be a very light coat!
X3 the people that think the oil is getting into there engine must REAALLY oil them
__________________
Black 97 Sahara 4.0L 5 Speed - Fully Cloak'd
1.75" BL with 35"x12.5" Wrangler MTR w/ Kevlar 10k Engo winch
obidya is offline   Quote Quick Reply
Old 11-17-2011, 08:33 AM   #28
Jeeper
 
Join Date: Jul 2011
Location: Broken Arrow, OK
Posts: 2,305
Quote:
Originally Posted by AMangum View Post
What metric are you using to get these numbers I wonder? Are you doing any kind of strict testing procedure with controls to ensure the numbers you are reporting are scientifically accurate or are you just tossing out arbitrary stats based on your perceptions? Did you dyno using both filters on each vehicle to get your power comparisons? Did you run a static test track under identical conditions where you precisely measured fuel consumption with each vehicle using each filter? Short of forced air induction or a paper filter that is severely obstructed, the differences in normal aspiration between the two filters could not reasonably account for such differences.

My point is that people's perception of something often does not line up with reality and that's fine if you want to think the K&N filters are doing for you what you claim, but pushing those hard numbers as factual results and then tossing in the disclaimer at the end that those are just opinion based is disingenuous at best when there is no testing method behind those numbers. The variance in MPG you state could easily be attributed to a large number of factors and unless you tested with controls in place to ensure accurate results, even something as small as if you were driving into the wind as opposed to with the wind, those numbers are then suspect and could easily be skewed by such variances.
This is exactly what I was thinking the whole time I was reading that post. For most people that install a mod they feel exactly what they want to feel whether it's there or not. That's just human nature. If you do something to make the car louder or change its sound you tend to interpret that as more power/faster whether it is or not. If you install an exhaust you tend to see a reduction in mileage because your foot is in it all the time so you can hear the exhaust. If you install something that is supposed to help mileage you usually drive easier and your mileage does go up. The world of bolt on mods is full of misinterpreted signals and self fulfilling prophesies.

Quote:
Originally Posted by rics1997 View Post
Filters or CAI will not increase gas mileage in newer model computer controlled vehicles. I had an article on this a while back but can't find it right now but even filter manufacturers will tell you this. They can possibly help a very little with throttle response and hp but can not improve gas mileage. Go figure.
I have yet to understand why anyone would think a filter will increase mileage unless the old one was so dirty the engine could barely pull you down the road. If you have an engine that makes 200 hp and uses maybe 20 hp to go down the road, how could the same filter that allows you to make 200 hp be so restictive that it is hurting performance when the engine is making 20 hp? That makes no sense at all. The only exception to this is if you have a an engine that has to work pretty hard just to get down the road like when you're pulling a trailer or have an engine that doesn't make much power and the pedal is on the floor a lot just driving around.

Quote:
Originally Posted by Overtrained View Post
Are you guys soaking the filters overnight in a barrel of filter oil? It's supposed to be a very light coat!
Quote:
Originally Posted by kjeeper10 View Post
Quote:
Originally Posted by obidya View Post
X3 the people that think the oil is getting into there engine must REAALLY oil them
Have you guys purchased a K&N filter lately? They may as well be shipped in a 55 gallon drum of oil. You can spend an hour sopping up the oil with a rag then lay the filter on the workbench and it will leave a puddle if you let it sit for an hour. There's no way you could install a new K&N that's properly oiled because they come swimming in the crap and there's no practical way to fix that.
__________________
2012 Silver Sport S, Silver, 6 speed, soft top, 3.73s, LSD, PCG, Infiniti, deep tint windows, Pro Comp 1028 wheels, 33" Duratracs, Smittybilt bumpers and steps, KC fog lights, Mopar slush mats and fuel door.

Happiness is a belt fed weapon.
oilwell1415 is offline   Quote Quick Reply
Old 11-17-2011, 08:58 AM   #29
Member
 
Join Date: Dec 2010
Posts: 764
On ford trucks, the people on FTE forum all have trouble with k+n filters as they get oil on the mas air sensor which sets right behind the air box. Then the truck doesn't run right and you have to replace or clean the mas which isn't cheap. Never had to clean a mas on all the fords I run. We run in dirt and dust a lot so I change air cleaners on all vehicles at every 5000 mile service. Wouldn't want to wash and oil a k+n every 5k as it is a pain to do. Most people who run the k+n filters neglect to service them properly. Yes they do increase air flow, but in doing so they don't filter as fine as a paper filter. Best left for the guy running on the drag strip. Not good for the daily driver, or the average soccer mom. Or even a mall crawling jeep!
KSCRUDE is offline   Quote Quick Reply
Old 11-17-2011, 09:43 AM   #30
MallCrawler

WF Supporting Member
::WF Moderator::
 
kjeeper10's Avatar
 
Join Date: Feb 2011
Location: Connecticut
Posts: 33,785
Alright since nobody else wants to doit


__________________
2007 Rubicon/Rock Krawler TR 2.5 coils/rear TB/Rancho 9000 31/32XL shocks/Teraflex monster TB/Synergy highsteer,tie rod, ball joints/Hankook MT 315-75-16 on Level 8 ZX's/MC front SB links/Rancho geo brackets & shocks/Fox ATS stabilizer/Adams front DS/Artec front armor w/ Currie upper bushings=Frankinjeep from hell.

Lifting your JK? Read this!!



Click HERE to become a WranglerForum Supporting Member!
kjeeper10 is online now   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler 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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may 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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wtb: K&N Drop In Filter 33-2114 02WranglerTJ Classifieds Archive 2 06-08-2011 04:14 PM
replacing my k&n intake old_blue TJ General Discussion Forum 7 05-07-2011 10:21 AM
K&N Intake System henderrj YJ Tech Forum 1 04-02-2011 07:50 AM
k&n air filter, vs k&n air intake? gotpepsi TJ General Discussion Forum 21 12-22-2010 12:24 PM


logo carid shop wrangler parts carid fender flares custom wheels store avs deflectors at carid
» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 07:02 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC