K&N, and FIPK useful or not? - Page 2 - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ 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 07-17-2009, 01:28 PM   #31
delicate %$^&*@ flower

WF Lifetime Member
 
tiny terror's Avatar
 
Join Date: Feb 2006
Location: California
Posts: 14,753
Quote:
Originally Posted by rrich View Post
""""""I drew my conclusions when my engine started gasping for air because the filter was so clogged after a very short while. I replaced it with a traditional filter and no more problems,""""""

I wonder where that dirt's going now?
Never said a word about the dust getting through, said the filter clogged after a very short while and the engine begged for air. Nothing more. Not dismissing other's experience either, only stating mine. Draw your own conclusions.

tiny terror is offline   Quote Quick Reply
Old 07-17-2009, 01:57 PM   #32
Jeeper
 
Join Date: Aug 2008
Posts: 2,473
He He - Jerry - The reason is I still haven't found anything that does a better job.
The tests that you quote - I've seen rebuttals to it - on the internet. They say the tests were on a different K&N than we use, the dust was different, and the criteria for pass/fail was unusual. So who knows what is real and what isn't?

Like I said "paper does not reject ink." That's why we have so much trouble with politicians today. There are "high performance" plugs, TB spacers, cats and mufflers, computer chips, all sorts of flim flam that that claim near magic. Some may have some benefit, some not. The only real way to tell is to try it ourselves. (If you bought all the "mileage improvers" from JC Whitney they offer - would you have to periodically drain the gas tank just to keep it from overflowing?)

So that only leaves my crude tests that I've conducted myself, on my vehicles and on others that I've played with. Totally not scientific of course!

Hmmm, since the rag test I use comes out clean as opposed to ALL the other types I've tested (note - those I've tested,) stock, paper on snouts, prefilters over paper etc. They've been on lots of customer's and friends systems. I've stayed with what seems to work.

But then, if I did find another one that's even better, how would I know? A clean rag is still a clean rag.

I'm certainly not opposed to trying other methods.

Since I live where there's only 3 paved roads and everything else is dust roads or trails, it's important.

What I'd really like to see is a paper filter, then a centrifugal element, then another filter. But to handle that much volume of air with minimal restriction it would be huge! (Maybe it's time for you, or someone, to start inventing?)

What I have noticed is the worst ones seemed to have an issue with sealing - if the air can get around the filter it will!
Even the drop-in stock type K&N's let the dirt in - they don't seal properly around the edges. If there's a way around whatever restriction any filtration device has, the air will surely take it.

And - K&N is not for everything. Contrary to what K&N says, vehicles with MAF sensors will go nuts (so we know they "get creative" too.) The slight oil mist from the filter gets on the hot wire, when the ECM does it's "Burn off" at start-up, it turns that oil coating to charcoal/sludge. It will cause the ECM to get the wrong info - greatly affecting performance, mileage etc. Fortunately Jeeps don't use that system.
That's not from rumor I had it happen to one of my Astro Vans - the only MAF system I have - not just once either. Takes about 500 miles to start screwing things up.

5000 coke bottles every minute at cruise? That's a bunch of air!

__________________
It's no wonder the country is falling apart - stupidity abounds!
rrich is offline   Quote Quick Reply
Old 07-17-2009, 02:18 PM   #33
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 32,745
Images: 2
Rich, I'm extremely (!) confused.

How can you and I wheel in the same SOCAL deserts yet get two entirely different results from the same type of K&N air filter? Mine passed dirt so badly I ended up adding one, then another pre-filter to cut down on the dirt it was passing into my air intake. Yet you claim your K&N doesn't pass the same type of dirt my K&N passed like it was a screen door?

Why would I have gone to the trouble and expense of adding the two prefilters as shown below if my K&N air filter was even close to being as good at filtering out desert dust & dirt as you claim yours is?
Attached Thumbnails
Click image for larger version

Name:	K&N.jpg
Views:	10
Size:	64.8 KB
ID:	9776  
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 07-17-2009, 03:15 PM   #34
Jeeper
 
Levinoss's Avatar
 
Join Date: Apr 2007
Location: Jeffersontown
Posts: 5,540
Quote:
Originally Posted by Jerry Bransford View Post
Rich, I'm extremely (!) confused.

How can you and I wheel in the same SOCAL deserts yet get two entirely different results from the same type of K&N air filter? Mine passed dirt so badly I ended up adding one, then another pre-filter to cut down on the dirt it was passing into my air intake. Yet you claim your K&N doesn't pass the same type of dirt my K&N passed like it was a screen door?

Why would I have gone to the trouble and expense of adding the two prefilters as shown below if my K&N air filter was even close to being as good at filtering out desert dust & dirt as you claim yours is?
Jerry I think we all know the cat is out of the bag....











JERRY WORKS FOR THE MAN! HE IS TRYING TO SELL ALTERNATIVE FILTERS OTHER THEN THE GREAT K&N! STOP THE ALL THE LIES!
__________________

"Yesterday is history, tomorrow is a mystery, but today is a gift. That is why it is called the "present."
Levinoss is offline   Quote Quick Reply
Old 07-17-2009, 03:24 PM   #35
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 32,745
Images: 2
Quote:
Originally Posted by Levinoss View Post
Jerry I think we all know the cat is out of the bag....











JERRY WORKS FOR THE MAN! HE IS TRYING TO SELL ALTERNATIVE FILTERS OTHER THEN THE GREAT K&N! STOP THE ALL THE LIES!
Oh sheesh, the secret's out. How'd you find out?
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 07-17-2009, 03:28 PM   #36
delicate %$^&*@ flower

WF Lifetime Member
 
tiny terror's Avatar
 
Join Date: Feb 2006
Location: California
Posts: 14,753
Quote:
Originally Posted by Levinoss View Post
Jerry I think we all know the cat is out of the bag....











JERRY WORKS FOR THE MAN! HE IS TRYING TO SELL ALTERNATIVE FILTERS OTHER THEN THE GREAT K&N! STOP THE ALL THE LIES!
You should have seen him at the Meet and Greet, trying to entice us with his filters. He's up to no good. And has a sneaky look on his face, too.
tiny terror is offline   Quote Quick Reply
Old 07-17-2009, 03:31 PM   #37
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 32,745
Images: 2
Oh gawd this is going down a rat hole fast.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 07-17-2009, 03:45 PM   #38
Jeeper
 
Levinoss's Avatar
 
Join Date: Apr 2007
Location: Jeffersontown
Posts: 5,540
Quote:
Originally Posted by tiny terror View Post
You should have seen him at the Meet and Greet, trying to entice us with his filters. He's up to no good. And has a sneaky look on his face, too.
Oh I saw him there and I got shots to back up my theory.



He is now selling his ORANGE DROP IN'S TO KIDS! ORANGE! What is he doing?
__________________

"Yesterday is history, tomorrow is a mystery, but today is a gift. That is why it is called the "present."
Levinoss is offline   Quote Quick Reply
Old 07-17-2009, 03:48 PM   #39
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 32,745
Images: 2
That pic is frigging hilarious, I'm stealing a copy for future use.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 07-17-2009, 04:39 PM   #40
Jeeper
 
meyers's Avatar
 
Join Date: Apr 2009
Location: Dover, New Hampshire
Posts: 738
I use a K&N in my 02 4.0, with the stock air intake. Works for me, but I don't do the high dust off road stuff you all do. If its like the desert here in the Sandbox, doesn't matter what you use you will be changing or servicing it frequently. Anyone wanna discuss oil filters now
meyers is offline   Quote Quick Reply
Old 07-17-2009, 04:58 PM   #41
Jeeper
 
Levinoss's Avatar
 
Join Date: Apr 2007
Location: Jeffersontown
Posts: 5,540
Quote:
Originally Posted by meyers View Post
I use a K&N in my 02 4.0, with the stock air intake. Works for me, but I don't do the high dust off road stuff you all do. If its like the desert here in the Sandbox, doesn't matter what you use you will be changing or servicing it frequently. Anyone wanna discuss oil filters now
Don't wana go there! Jerry might start pimping the oil filters too!
__________________

"Yesterday is history, tomorrow is a mystery, but today is a gift. That is why it is called the "present."
Levinoss is offline   Quote Quick Reply
Old 07-17-2009, 09:31 PM   #42
Jeeper
 
Join Date: Aug 2008
Posts: 2,473
Ha Ha Jerry - now we know! A plant!

Just kidding. I really don't know why we are getting different results. You can drop by here sometime and have a look at mine. I'm beginning to wonder if it's the Rockette tube I'm using - maybe the inside is too smooth the catch the errant dust to make the white rag test valid? Dunno.

I think I'll roughen it up inside, then spray a little of the K&N oil inside - if there's dust that should catch it.
If it is passing dust, it should show signs of it pretty quick.

But then, I'd think the throttle plates would get dirty too. So far, they look clean. 60,000 miles and I've never touched them. And I never did find a pre-filter that fit properly over the K&N I'm using. I do clean it more often than recommended, probably every 6-8000 or so, and rotate between 3 elements.

I did buy one of the Filters you recommended - but it's a little too big, hits the hood, I need to bend the metal snout a little, and remake the support. It's on the "to do list."

I just bought 2 used Cherokees - haven't looked to see if they are dusty or dirty yet. If I remember right, one has a K&N sticker on the airbox. That doesn't mean it has one, but it might. I'll go look.

I know this subject has been beaten to death - because it's important. There are an awful lot of scams out there, chips that do nothing, TB spacers, performance? plugs, etc. Many have so called "studies" intended to establish credibility - yet they are totally untrue. Places like this where we try things, essentially do our own testing are invaluable.

No, I'm not a K&N shill either. I'd just like to find something that really works!
__________________
It's no wonder the country is falling apart - stupidity abounds!
rrich is offline   Quote Quick Reply
Old 07-17-2009, 09:36 PM   #43
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 32,745
Images: 2
Quote:
Originally Posted by rrich View Post
Ha Ha Jerry - now we know! A plant!

Just kidding. I really don't know why we are getting different results. You can drop by here sometime and have a look at mine. I'm beginning to wonder if it's the Rockette tube I'm using -!
It can't be that, I'm using the same TurboCity Rock-It air intake tube too. I'm running it because of its CARB sticker, my sawed off OE air intake tube failed the smog visual inspection.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 07-17-2009, 10:28 PM   #44
Jeeper
 
Join Date: Aug 2008
Posts: 2,473
Hmmmm, then it's the same set-up. Same dust from the same areas we frequent. Dunno!
Too many people have reported dirt getting through to figure it's a wives tale or the competition telling lies. But why is mine clean?
It's about due for servicing, I'll take pics of the ugly filter and the rag. It'll probably be a few days, it's air conditioning recharge season and I have a backlog.

True, I haven't been off roading much lately due to heart and foot troubles, but enough to ingest dirt.

The cut off stock tube - it shouldn't have failed - if it was a TAC - Thermostatic Air cleaner - that was modified, then yes, but it's just considered a duct from the filter box, not an emission control. The box is not heat controlled in any way. The test tech didn't understand. But I'm sure that's why Rock-it has the CARB approval to prevent probs.

Next time when it needs smogging, let me know - I have a friend with a smog station in Yucca that understands the laws (he used to be a BAR inspector) and is an avid off roader. I won't ask him to pass anything illegal but he knows what is and what isn't OK. I dropped my smog license years ago.
__________________
It's no wonder the country is falling apart - stupidity abounds!
rrich is offline   Quote Quick Reply
Old 07-18-2009, 12:09 PM   #45
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 32,745
Images: 2
My TJ passes its smog tests, it only failed the visual test once years ago when I showed up with the OE air tube having been cut off to clear the OBA compressor. It was easy for the tester to see I had modified the air intake so he wouldn't even start the rest of the test. All it took to pass a week later was the Rock-It air tube that has the required CARB sticker. Stupid since it's essentially the same thing but what are ya gonna do Rich, it's California and the Dems are in charge.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 07-19-2009, 03:40 PM   #46
Jeeper
 
Join Date: Aug 2008
Posts: 2,473
Boy my face is red!

Last night I decided to service the Rubi - and swap the K&N with a clean one. I took along my camera - took pics of how dirty it was on the outside.
I was going to do my usual white rag test and show everyone here how clean it comes out.
I didn't have a white rag handy, so I used a white paper towel. Made a thick pad and shoved it down the snout - snout still in place on the engine. My grabber wouldn't grab it to pull it out, so I took off the snout and pushed it the rest of the way.

WHAT'S THIS? Dirty! The towel was dirty! That had never done that before - every time I'd done that to test the efficiency of the K&N it always came out clean.
Looking down the throttle body I could see what looked like grease on the butterfy and the throat. That "grease" turned out to be a slight bit of K&N oil and super fine dust. I remember last time I'd over oiled the filter, thinking it would get ingested harmlessly.

Bummer!

I just proved what others have been saying all along!

But why this time and not all the previous times?

Using a strong light inside the filter did not show any holes, I hadn't washed it out yet.
Running a towel inside the filter did not show any signs of dirt - except in one spot - a little - but there was no hole there.
A mystery.

After pondering it awhile, and a beer helped, I remounted it in the same position it had been. The snout mount is actually slightly too high, so when the hood closes it pushes down on the K&N element. It only pushes it about 1/2 inch, and the base is rubber, easily deflecting the push. Shouldn't hurt anything.

Took it off - then bent the element slightly like the hood does with the light inside - a hole! The screens were pulling away from the rubber mount, leaving a crack!

Apparently this element was falling apart, where before they hadn't been.

In any case - NO MORE K&N FOR ME!

Cleaned a ton of crud off the TB, I'm surprised it even worked.

Jerry - I think you said you now use a True Flow with a pre-filter. I have one and just ordered a prefilter from Outerwears. Are you still using a foam pre-filter too? If so, what kind?

I've been searching for a small centrifugal filter unsuccessfully. That may be a good way to go. A friend that used to race a VW in Baja had one on his VW - he thinks he may still have one. If I could get the mfgr's name from it they may make something that would do the job.
Thinking centrifugal in conjuction with a good foam.

I'm cutting, bending, welding the snout and mount lower so it won't touch the hood.

How do you prepare crow, with onions and peppers? I'll be eating it a long time!

Rich
__________________
It's no wonder the country is falling apart - stupidity abounds!
rrich is offline   Quote Quick Reply
Old 07-19-2009, 07:33 PM   #47
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 32,745
Images: 2
Join the crowd Rich, and don't worry about eating crow since I already long-ago pretty much ate the entire local crow population and there's none left for you.

Yep I'm runnng a TrueFlow air filter, and the same Outerwears & foam air filter I did when I was running the K&N. I figured even though the TrueFlow is a better air filter, the olf prefilters fit it perfectly and the more dust I can keep out of the engine the better. I bought the Unifilter foam filter locally, we just looked through the store's stock for one with the right diameter to provide a good snug fit.

Enjoy that new TruFilter, mine works pretty good though I still wish I could just go back to the OE air filter box and paper element air filter.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 07-19-2009, 08:07 PM   #48
Senior Member
 
Join Date: Sep 2008
Posts: 2,775
I'll be getting an OE box and tube from a local seller next week.

I was going to do a little cutting and mount the box closer to the battery than the stock setup.

Would that be a concern for smog when I have to start worrying about it?
stevens243 is offline   Quote Quick Reply
Old 07-19-2009, 08:17 PM   #49
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 32,745
Images: 2
Quote:
Originally Posted by stevens243 View Post
I'll be getting an OE box and tube from a local seller next week.

I was going to do a little cutting and mount the box closer to the battery than the stock setup.

Would that be a concern for smog when I have to start worrying about it?
I can't imagine the smog guy giving you trouble over that since you're just slightly moving the OE filter box. He probably wouldn't even know it wasn't supposed to be like that if you did a nice job relocation it.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 07-19-2009, 08:40 PM   #50
Jeeper
 
Join Date: Aug 2008
Posts: 2,473
Thanks Jerry - we still have some crows out here. LOL
He He - I'm still going to try to pursue the centrifugal thought - but I'm pretty much out of room. But if it's better, then room will be made somehow.


Larry - technically where the PVC system connects is where the emissions controls start. Out toward the filter from there is NOT part of the emissions system. The airbox is not thermostatically controlled and no other emissions devices are out there. So technically it should be legal. I'd pass it.

But - many technicians are a bit overzealous - and afraid to pass it if it's not original factory stock. The fines and penalties are too huge a risk for them.

So - think about it - unless the tech is a Jeep owner would he know the airbox is in the wrong location? He'd just about have to compare it with another or a picture.

Make it look factory original and it shouldn't be an issue. All you are doing is remounting it and shortening the ducting.

Making room for on-board air?

Something I've never addressed but should. At slow speeds but high RPM, the fan blows an awful lot of air downward - if the terrain is dusty at all, it creates a huge dust storm. That duststorm is also going inside the engine compartment. Everything gets dirty instantly. That makes filtration harder and even more important.
It's air exiting the engine compartment that stirs it up.
I'm "gunna" try experimenting with a deflector shield to deflect at least some of that air rearwards.

Anybody address it already?

I've been planning on building a skid plate to protect the bottom of the radiator - it could be a combination skid and deflector.
Ideas?
__________________
It's no wonder the country is falling apart - stupidity abounds!
rrich is offline   Quote Quick Reply
Old 07-19-2009, 08:50 PM   #51
Jeeper
 
Join Date: Jan 2009
Posts: 15
2001 wrangler inline 6 with k&n CAI and i love it....
forner is offline   Quote Quick Reply
Old 07-19-2009, 10:02 PM   #52
Jeeper
 
Dfib's Avatar
 
Join Date: Apr 2009
Location: LaX, WI
Posts: 47
Quote:
Originally Posted by Loic View Post
I have changed on all my bikes to K&N air filter without any problems. and much better than OEM air filter.
No... It's not. Not at all...

BMC? Maybe. K&N, never...

If you have any questions, inquire here: http://www.power-tripp.com/

He has personally tested aftermarket filters. K&N did not produce better hp than stock.
__________________
[SIGPIC]
03 TJ "Work in progress"
Dfib is offline   Quote Quick Reply
Old 07-20-2009, 02:13 PM   #53
Senior Member
 
Join Date: Sep 2008
Posts: 2,775
Thanks Jerry and Rich. I assumed that was the case, just wanted to check.

Yeah, I want to leave room for a future OBA system. Jerry introduced me to his and now I have PSI envy.
stevens243 is offline   Quote Quick Reply
Old 07-20-2009, 02:29 PM   #54
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 32,745
Images: 2
Quote:
Originally Posted by stevens243 View Post
Jerry introduced me to his and now I have PSI envy.
You had me scared for a second until I re-read it.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 07-20-2009, 02:40 PM   #55
Jeeper
 
Jeepzcb09's Avatar
 
Join Date: Jun 2009
Location: springfield,OH
Posts: 714
what do you guys think of frams Air Hog filters? They claim to add hp and other performance and are reusable? I would trust fram over K and N
Jeepzcb09 is offline   Quote Quick Reply
Old 07-20-2009, 03:10 PM   #56
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 32,745
Images: 2
The problem with any air intake or filter system claiming to add power is they can ONLY add power if the air intake they are replacing is restrictive. Some vehicle air intakes are indeed restrictive and some actually have flow restrictor plates purposely added. For those types of air intakes, yes they can add power.

But the TJ's air intake was specifically designed to be non-restrictive and has no restriction points added to it. Look at that air intake, it's just a huge surface area air filter plus a wide-open air intake tube with nothing inside but air. It is capable of flowing more air than the engine is capable of demanding. If it's already totally non-restrictive, you can't make it less restrictive.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 07-20-2009, 04:46 PM   #57
Jeeper
 
Join Date: Aug 2008
Posts: 2,473
Except for the tiny little air inlet/airhorn to the airbox - in the front of the box.

Remember, 5000 liters of air (or Coke) trying to get through that small opening at 2500 RPM - cruise. (4L/2*2500) Not to mention WOT at 3500-4000.

No, it will not make it run rich - the O2 sensors compensate for that, but you'll be operating at a greater throttle angle - leaving less room to "punch it." That's where the "extra power" or "extra acceleration" comes in.

At WOT it can't get all the air it could without that restriction (the extra fuel is added by the computer.)

Notice WHY they put that little airhorn (restriction) on - try running without it (it just pops off) - the noise is considerably louder without it.

The box itself isn't very restrictive, even though it makes the air bend around through the filter, the tube or duct to the TB isn't bad either. It's mainly that little airhorn.

Try it on the road - simply unhook that long duct from the airbox - take it for a ride - avoid dust. You'll feel the difference.

And if you want to get technical - try something else - remove the PCV hose, let it dangle to get fresh air.
Hook a vacuum gauge to the PCV connection on the duct. Snap the accelerator - if you see ANY vacuum in that duct, it's restricting. Try holding your hand over that small airhorn while snapping and watching the gauge, you'll see how it works.

For a more accurate trial - instead of a typical insensitive vacuum gauge, use a Manometer. ANYTHING read on the manometer is unacceptable for racing purposes. But for our purposes, that's overkill.
__________________
It's no wonder the country is falling apart - stupidity abounds!
rrich is offline   Quote Quick Reply
Old 07-20-2009, 05:18 PM   #58
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 32,745
Images: 2
Quote:
Originally Posted by rrich View Post
Except for the tiny little air inlet/airhorn to the airbox - in the front of the box.
Right from Jim Repp in Jeep engineering... while it might appear to be restrictive, that trumpet is necked down slightly only to quiet the air intake sounds by speeding the air flow. But Jeep engineering dept. tests show that it does not restrict the air flow to below what the engine is capable of demanding. This is right from senior Jeep engineer Jim Repp who has been with Jeep engineering since its AMC days. I used to talk with Jim off & on back in 2001-2002 quite a bit just before the Rubicon came out and this is one subject I asked him about due to my interest in the TJ's air intake. It's not hearsay in other words.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 07-20-2009, 06:11 PM   #59
Jeeper
 
Join Date: Aug 2008
Posts: 2,473
Necked down for a venturi effect (smoothing the pulsations) - but look at the size of the hole it goes through. 5000 liters through that?

But the proof is in the pudding - remove the air duct tube from the box, then take it for a short drive. It's a very noticeable difference. (and much louder.) Just remember there isn't any filtration like that.

Some folks open up that hole, cut more holes, or cut the end of the box out completely.

Because it does make a difference several industries have focused on modified air induction systems for the TJ. It's a million dollar industry now.

But - at low end, or even cruise it's not noticable (throttle angle will be greater) - acceleration or wide open it is.

Kinda like a snorkel swimming mask - you can breathe fine - unless you try to run with it.
__________________
It's no wonder the country is falling apart - stupidity abounds!
rrich is offline   Quote Quick Reply
Old 07-20-2009, 08:06 PM   #60
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 32,745
Images: 2
Quote:
Originally Posted by rrich View Post
5000 liters through that?
Nope but it handles 4 liters just fine.

__________________
When you have a choice, buy American.

Jerry Bransford is offline   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:
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
K&N FIPK Legal in CA? dylan California Jeep Forum 13 01-07-2010 09:53 AM
K&N FIPK - 91-95 YJ 4.0L - Gotta Go - Super Deal 4x4ROCKSHOP Classifieds Archive 1 02-03-2008 07:25 PM



Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 12:00 PM.



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