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Old 03-27-2012, 04:55 PM   #1
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K&N or AIRIAD CAI and brakes with 35s question

Hey guys.

I know i know, another CAI question, but to put it to bed, i need your opinion.
Which one should i get for the '12, 3.6L Pentastar? K&N would be a more logical choice as my JKU is gonna be a European soon, shipping it overseas to my summer house, where it's gonna stay and K&N is definitely easier to get parts and oils for overseas (that's if i decide to go with the oiled filter), but i heard very good things about the Airaid for our JKs, so if it's better, i'm gonna go that route. What do you guys think?

And my second question is from a completely different barrel-brakes:
Did you guys change your brakes when upgrading to 35" tires? I just upgraded to 18" rims and heavy 325/35s and i'm worried the brakes are gonna get fried very soon. Do you guys have experience with this?
Thanks gals and guys

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Old 03-27-2012, 05:03 PM   #2
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K&N are known to let a lot of dirt in not to mention that CAI are not worth the money period. Doubt you will find many that would recommend either. Oil filer will suck in oil also. Not sure how these companies convince people that these are worthwhile products. Great marketing I guess. Before computer controlled engines there were some merits to these product but not any more. Better off putting your money in a worthwhile mod

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Old 03-27-2012, 05:15 PM   #3
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Originally Posted by rics1997 View Post
K&N are known to let a lot of dirt in not to mention that CAI are not worth the money period. Doubt you will find many that would recommend either. Oil filer will suck in oil also. Not sure how these companies convince people that these are worthwhile products. Great marketing I guess. Before computer controlled engines there were some merits to these product but not any more. Better off putting your money in a worthwhile mod
I agree with this.
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Old 03-27-2012, 05:18 PM   #4
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Originally Posted by rics1997 View Post
K&N are known to let a lot of dirt in not to mention that CAI are not worth the money period. Doubt you will find many that would recommend either. Oil filer will suck in oil also. Not sure how these companies convince people that these are worthwhile products. Great marketing I guess. Before computer controlled engines there were some merits to these product but not any more. Better off putting your money in a worthwhile mod
^^ Pretty much sums it up, IMO.

As far as the brake mod, I really don't know too many who've done it. I run 35's and don't plan on doing anything special to my brakes. My setup's very lightweight, though...35" DuraTracs on 16" Teflon wheels. That said, TeraFlex makes an HD brake kit:

Jk Big Brake kit | TeraFlex Suspensions
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Old 03-27-2012, 05:33 PM   #5
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That said, TeraFlex makes an HD brake kit:

Jk Big Brake kit | TeraFlex Suspensions
Thanks for this
and thanks to everyone about their CAI opinions.
I guess i'm one of the few fans of CAI after installing it to my SRT8 Charger. Not only does it sound better with a slight whistling supercharger-like sound (yes i know completely different vehicle) but you can definitely hear the engine breath better and a proven increase of 4HP on a dyno (yes not much but still...). But that's HEMI, known to be air happy, but so are all engines, and since i'm putting a new muffler in, i think CAI can only help. I mean it only makes sense, more air in, more air out, i'm actually pretty surprised about the skepticism about the product.
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Old 03-27-2012, 05:43 PM   #6
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Originally Posted by JK NotLimited

Thanks for this
and thanks to everyone about their CAI opinions.
I guess i'm one of the few fans of CAI after installing it to my SRT8 Charger. Not only does it sound better with a slight whistling supercharger-like sound (yes i know completely different vehicle) but you can definitely hear the engine breath better and a proven increase of 4HP on a dyno (yes not much but still...). But that's HEMI, known to be air happy, but so are all engines, and since i'm putting a new muffler in, i think CAI can only help. I mean it only makes sense, more air in, more air out, i'm actually pretty surprised about the skepticism about the product.
The reason there is skepticism is because an engine, no matter what filter, exhaust, CAI you put on it, it still requires the same amount of air, coming in. The only time you will get a noticeable usage from a CAI is with a higher compression, long camshaft lobe, and or port and polishing of the heads or forced induction.

The engine can only use so much air, and the stock intake works perfect at that. Not only will you waste your money but you will lose cleanness of air, and wont gain any HP.

Think of it this way, you have a hole 2 inches in diameter, you have a pipe that is 2 inches in diameter you will have good flow. Add a 6" pipe, and you still get restricted down to 2" at the hole. The only way to use the extra flow, is to increase the need of air into the engine.
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Old 03-27-2012, 06:01 PM   #7
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In this thread a guy got an extra 6 HP at the wheels with just the AFE CAI, so I guess a little more air doesn't hurt. Skip to post #73:

http://www.wranglerforum.com/f33/afe...-137259-3.html
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Old 03-27-2012, 06:14 PM   #8
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Originally Posted by pdubois64
In this thread a guy got an extra 6 HP at the wheels with just the AFE CAI, so I guess a little more air doesn't hurt. Skip to post #73:

http://www.wranglerforum.com/f33/afe...-137259-3.html
All comes down to the buyer. Ive been in my turd 2.5l and I've been in promod drag cars. 6hp isnt going to be noticeable in a 5,000lb vehicle all those "feelings" are placebo.

Take that 6hp and put it on a qaud, or lightweight single person vehicle and youll feel it. If you want the sound thats fine, I took my airraid off my TJ and installed the factory system. No changes in driving at all.
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Old 03-27-2012, 06:22 PM   #9
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Originally Posted by IndyJeepMan View Post
All comes down to the buyer. Ive been in my turd 2.5l and I've been in promod drag cars. 6hp isnt going to be noticeable in a 5,000lb vehicle all those "feelings" are placebo.

Take that 6hp and put it on a qaud, or lightweight single person vehicle and youll feel it. If you want the sound thats fine, I took my airraid off my TJ and installed the factory system. No changes in driving at all.
I'm not saying I think it's worth while, but there are gains, it isn't zero.

At least these companies are posting more realistic HP numbers these days, I don't see anyone claiming 25 HP anymore..
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Old 03-27-2012, 06:29 PM   #10
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Looking at this also, The kits, for the cost, don't have a great boost/dollar value. Plus, still pulling air from the engine compartment.

Second point is, there is a vacuum pump, this is due to the low vacuum at the intake. This tells me there is a good air flow already.

So I did this. Drilled some holes in the side of the hole to get true/better cold air into the engine. So far, have noticed it spins up a litter faster when above 3K RPMs. Will see if there is any MPG changes.
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Old 03-27-2012, 07:48 PM   #11
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Originally Posted by pdubois64

I'm not saying I think it's worth while, but there are gains, it isn't zero.

At least these companies are posting more realistic HP numbers these days, I don't see anyone claiming 25 HP anymore..
This is true! On a performance with increased stroke and compression it would achieve those numbers. My.neighbor went from the factory style LS1 intake on his super street, to a custom "true" cold air $2,000 intake and brought almost 75hp and 82lbs torque
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Old 03-27-2012, 10:20 PM   #12
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This is true! On a performance with increased stroke and compression it would achieve those numbers. My.neighbor went from the factory style LS1 intake on his super street, to a custom "true" cold air $2,000 intake and brought almost 75hp and 82lbs torque
What's the "true CAI" u r talking about? I'm guessing your neighbor has a Camaro? I like those. But at 6'6" 250lbs can't fit in it But am very happy with my SRT8 (pic on a track with some unfair rivals )
Has anyone seen American Chopper this past Monday? Junior did the Camaro...
Could've been much better as far as the looks go IMO but the supercharger and the exhaust sounded AWESOME huh? I can't remember, did they do CAI? I guess that's a good measurement no? If it was worth while they'd definitely throw it in there since they put 8k for a supercharger and exhaust system i doubt they wouldn't throw 400 for a CAI if Vinnie thought it was any good am i right? Does anyone remember?
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Old 03-27-2012, 11:17 PM   #13
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Originally Posted by JK NotLimited

What's the "true CAI" u r talking about? I'm guessing your neighbor has a Camaro? I like those. But at 6'6" 250lbs can't fit in it But am very happy with my SRT8 (pic on a track with some unfair rivals )
Has anyone seen American Chopper this past Monday? Junior did the Camaro...
Could've been much better as far as the looks go IMO but the supercharger and the exhaust sounded AWESOME huh? I can't remember, did they do CAI? I guess that's a good measurement no? If it was worth while they'd definitely throw it in there since they put 8k for a supercharger and exhaust system i doubt they wouldn't throw 400 for a CAI if Vinnie thought it was any good am i right? Does anyone remember?
It was a custom fabbed one off intake for an LT1, in yes his Camaro (90's body style). Went down under the car with a scoop for true cold air. But its highly cammed, and needs all that freshness!
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Old 03-28-2012, 07:15 AM   #14
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Originally Posted by JK NotLimited View Post
Thanks for this
and thanks to everyone about their CAI opinions.
I guess i'm one of the few fans of CAI after installing it to my SRT8 Charger. Not only does it sound better with a slight whistling supercharger-like sound (yes i know completely different vehicle) but you can definitely hear the engine breath better and a proven increase of 4HP on a dyno (yes not much but still...). But that's HEMI, known to be air happy, but so are all engines, and since i'm putting a new muffler in, i think CAI can only help. I mean it only makes sense, more air in, more air out, i'm actually pretty surprised about the skepticism about the product.
4hp? So even if you do actually have proof of that gain, unless you're a NASCAR driver that needed that tiny, tiny edge over another car, what did 4hp do for you? A hemi has what? 400 some hp? Next, if you tell me that you can feel the difference of adding 4hp, then I'd like you to come up to Jersey with me this weekend. I have some prime real estate near Giant's stadium that I think you might be interested in.

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