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Old 04-13-2011, 10:06 PM   #1
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air intake

I have a 07 JK 2dr Sahara with a 4inch rough country lift and 35inch nitto's. I was wanting to put a new cold air intake on it anyone have any idea which is the best for the jeep. I have a K&N complete on my truck and didn't know for my jeep.

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Old 04-13-2011, 11:48 PM   #2
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If you are familiar with K&N and are using it on other vehicles, stick with what you know.
I had a K&n on my 09 Rubi for around 3K miles and took it off. It is sitting in a box now. I didn't see any performance or mileage difference, it was loud and I was very disappointed. Maybe, just maybe, the addition of an exhaust system would have made a difference but the CAI by itself was a flop.

My opinion only. Good luck with yours.

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Old 04-14-2011, 08:12 AM   #3
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K&N=JUNK Nothing but dirt sucking cotton gauze. Oh and can let water in more easily. And who wants to wash and oil that greasy mess. I like a paper type filter and I always replace at every 5000 mile oil change. People hear that sucking noise with a cai and think it is running better. All in your head for the most part.
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Old 04-14-2011, 09:35 AM   #4
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Agree with all of the above. If you like what you have, stick with it. I've also used them in combination with different exhausts - the most expensive 8-10HP (with exhaust) you'll ever buy. Plus I don't dig the fast and the furious sound effects. Unless it's a V8 or a diesel pounding out a sweet song, I prefer to stay away from high expense/low gain power mods...again just my preference.
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Old 04-14-2011, 09:36 AM   #5
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I have had an AEM for 4 years. You don't have to oil the filter, just rinse it off with water and dry it.
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Old 04-14-2011, 11:02 AM   #6
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I personally don't have one. My husband runs an intake on his V8 Canyon and swears by it. He's determined to put one on my Wrangler. According to him it's the combo with exhaust that gives you the difference. Intake alone not so much worth the money.

I'm still on the fence, but this video he showed me is pretty convincing with the actual numbers. And everything bad I've "heard" about the intakes is either from those running them without exhausts or those not running them at all.



Hope I don't get beat up too bad here.....
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Old 04-14-2011, 12:32 PM   #7
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Quote:
Originally Posted by Vici View Post
And everything bad I've "heard" about the intakes is either from those running them without exhausts or those not running them at all.
This is absolutely true and you're a step ahead of the crowd if you read every response with this in mind. I'm as guilty as the next guy as posting on things I don't have any direct knowledge on, though I try to make sure I make it clear in the response. Of course, if the only responders on every topic were folks with direct knowledge, it'd be pretty quiet around here on a lot of topics!

If it's of any help to you though, here's my post on the intake I installed in my Jeep. (http://www.wranglerforum.com/f33/my-...iew-73660.html). I haven't made any changes to my exhaust, but I do like my intake.

Quote:
Originally Posted by Vici View Post
I'm still on the fence, but this video he showed me is pretty convincing with the actual numbers.
I've seen this before and this video bothers me for at least three reasons.

First, it doesn't show you WHEN in the RPM range the gains are obtained. Every dyno chart I've seen done with an intake show the most horsepower gain up in the 5k RPM range. When was the last time you drove your JK at 5k RPM? Exactly. The hp gain at the 2500 range is much less (two or three horses for an intake maybe). So in that sense, I think this video is misleading.

Second, by dynoing the whole package together, the video obscures whether it's one mod or all three that's providing any results. It's even possible, for example, that the intake adds a few horses and the exhaust takes some away. So it's trying to force a bundling that may or may not be helpful.

Third and most serious, insofar as I know it's not even POSSIBLE for at throttle body spacer to do something for the JK's engine. Somebody with greater tech knowledge than I may have some comments, but as I understand it, once you loose the carburetor a throttle body spacer becomes moot as a matter of pure physics. So for that, it looks to me like this company is selling a known lie. I don't like that and it makes me distrust them overall.

If you're even considering a throttle body spacer, I would suggest instead looking at an entirely new throttle body. Such as discussed here: (http://www.wranglerforum.com/f33/ins...ody-83868.html).
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Old 04-14-2011, 01:52 PM   #8
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MTH -- You have a great point about the 5k RPM..... hadn't even crossed my mind..... yet another reason I'm firmly on the fence. Seems there's always something I haven't thought of, which is the value of forums like this.

If I was to do the intake, I would only do it with the exhaust. I wouldn't necessarily be doing it for the HP numbers. what impressed me was the torque it provided. Seems if you're getting that much more torque to the wheels you're getting more performance somewhere. But I definitely can get out of my league fast here so I'll be the first to admit I could be wrong.

Charts....yea. Dynos....yea. I'd really like to DRIVE ONE! Anyone offering?
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Old 04-14-2011, 03:04 PM   #9
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Been looking at a Cold Air Intake myself. The shop I deal with showed me an S&B they say they like on their off road vehicles. I really liked the box and it snaps right into the same holes the factory box is mounted to. Also thinking of the water resistant pre-filter cover. Still on the fence about the exhaust and which to go with.
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Old 04-26-2011, 11:25 PM   #10
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OK a 380 dollar air cleaner, are you kidding me? This is a quest to see how much I can build this for. I have a 2010 Jeep Rubicon.
I wanted 3.5 inch pipe and found a nice pipe from just-intercoolers on ebay called
“Alum Intercooler Intake pipe 3.5" OD 75deg Elbow Turbo” This is 24 inch long.

For the coupler you will need a 3.5 to 2.75 inch reducer again on ebay,
3.5" to 2.75" Silicone Coupler Reducer Turbo, Red” $15.94

Sensor relocation
http://www.spectreperformance.com/#CATALOG.8711

Air cleaner
Spectre Performance - Official Site


Prices:
3.5 inch 75 deg pipe with shipping $40.88
3.5" to 2.75" Silicone Coupler Reducer Turbo, Red with shipping $15.94
Hose clamps at local home improvement store with tax $3.28
Spectre Sensor relocation kit, Local parts store with tax $8.59
Spectre Air cleaner Local parts store with tax $21.65

Stainless for the air box – Mine was a kick plate on a kitchen
door in an old church. Cutting and forming with lots of time.

Total price: $90.34 – I just saved around 300 bucks.

I started by cutting the 24 inch pipe and installed the grommets. Then made a Cardboard mockup of the air box. Then fab-ed the air box out of the stainless. Lastly bolted down the air box and connected everything up. I do agree with the noise comments, you can hear it growl when the Jeep is under load in gears 1,2,3 less in 4, 5 and 6. I was pleased how it came out. As for HP, it seems like it helped a little and time will tell if it helped MPG.



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Old 04-27-2011, 12:44 AM   #11
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Anyone ever use this filter? They also have a oil version. Both fit in stock box.

aFe Power MagnumFlow Pro-Dry S OE Replacement Flat Air Filter




Product Description (# 31-80155-AFE )
aFe Power MagnumFlow Pro-Dry S OE Replacement Flat Air Filter

Constructed with 100% polyurethane on all four sides this high flow oil-free OE replacement performance filter will outflow stock paper filter for improved horsepower and torque. Two layers of progressively finer mesh synthetic media provide maximum convenience and easy maintenance. Washable and reusable for multiple cleaning cycles the tall open evenly spaced pleats provide excellent dust holding capacity for longer service cycle between cleanings. Integrated urethane bump seal insures tight no leak seal over the life of the filter.
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Old 04-27-2011, 01:23 AM   #12
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i have a question. i have a edge tail jammer CIA. and the throttle body. i was wondering how to clean my filter. i went wheeling a few weeks ago and its covered but im not sure on how to clean it. which brings me to my next question. how do you clean a semi mud covered engine? can you just spray it with a power washer while having the intake covered?

now back to the OP. i personally saw a little gain out of the edge trail jammer kit. an honestly if there wasnt gain i still think the sound of the intake with the spacer is pretty sick. so i like it. i also have a magna flow exhaust which i saw no gain just a deeper tone when i put it on. if that helps any.
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Old 05-12-2011, 10:47 AM   #13
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Here is a good scientific test of paper vs gauze air filters. Check it out...My main concern is protecting my engine in an off road environment.

http://www.bobistheoilguy.com/airfilter/airtest1.htm

Granted...its not a jeep...but they all suck air the same!
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Old 05-12-2011, 04:09 PM   #14
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I have the aFe with the "oiled" filter, I liked the sound and the "power" it gave however I have heard that oiled filters are bad for the Jk so I will be replacing it with a dry one.

Two bad things about it though:
1) aFe does not come with an emissions exemption
2) there is a much higher chance of water injestion.
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Old 05-12-2011, 05:24 PM   #15
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Howdy,
I have had a Banks CAI on my Jeep for a week now. My mpg has improved 1.5 - 2 on two fill ups. This was checked with a calculator at fill up and not the dash estimate. I have no idea about a power increase but it does feel a little better. I am going to add an outerwear to help on water splashes. I had a cai on my Z-71 and the outerwear repelled water and I never had a problem with it. I am also going to change over to a dry element. On my truck I had a K&N and it fouled my mas with oil. GM even had a memo out about oiled elements and the problem with oil inside the mas. I know most will say that a cai is a wast of money but I like mine and would do it again!!! Have a goodun!!!
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Old 05-12-2011, 10:45 PM   #16
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I just pulled the little snout off the stock air filter housing. It sounds a bit better, and was free. I figure the box can suck a bit cooler air than directly off the bottom of the hood that way, but I am tempted to put a piece of aluminum in the gap under the intake hose to block debris flying off the the belt and pulleys and heading into the space behind the air box.
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Old 05-13-2011, 01:56 AM   #17
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Ask yourself, does your Jeep really need it? Is there an underlying problem that is making your Jeep less than adequate?

Are you running large tires without the gears to back it? Have you been maintaing your engine like you should? Are you maintaining your tranny like you should?

Other than the 2.5L, I can't see a reason why the 4.0L or the 3.8L would actually need performance mods under the hood. With proper gearing, any jeep can be brought back to life. You bought one of the most un-aerodynamic vehicles on the face of the earth, and installed tires that weren't designed for the vehicle. What did you honestly expect?

Stop wasting your money on silly things like engine mods. Buy something useful for your jeep.
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Old 05-13-2011, 11:50 AM   #18
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Howdy,
I bought my first car in 1960 and have never driven a stock vehicle over a month. Any factory stock engine can be improved on using after market parts. I enjoy doing it myself and I never had an engine that didnt respond to tweaking. I have heard all the "mini van engine" crap on these Jeep sites and dont buy into that one bit. Maybe I got the optional "Maxi van engine"!! Have a goodun!!!!!

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