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Old 12-28-2010, 09:24 AM   #1
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My Intake "Review"

Folks,

As I mentioned a few days ago, I installed an AEM Air Intake that I received as a Christmas gift in my 2010 JKU. The Jeep has a manual transmission, no lift, and 32" BFG (Rubi) tires.

Today is my first day back at work since the install, meaning I covered 35 miles driving in, including backroads and highways. My objective (so I believe) thoughts are as follows.

Overall, the intake does in fact sound different and appears to add a modest amount of power at highway speeds.

As to sound, the Jeep is throatier (is that a word?) at start up and idle. This change largely disappears during low RPM driving, but reappears whenever I'm firmly accelerating between 1800 and 3200 RPMs in any gear but first. It presumably continues at higher RPMs, though I generally shift by then. During acceleration, this throatier sound is such a change that I initially thought it was a large pick-up truck or similar vehicle nearby.

As to power, I only downshifted to 5th on the highway twice today, for the two "big" hills coming into Raleigh. Previously, I downshifted four or five times, essentially on each hill. Thus, while not much, there is clearly just a bit more pull at highway speeds. Whether I'll retain this as the engine ages (or perhaps as the onboard CPU adapts??), I don't know.

My only two complaints thus far are that (a) it obviously increases the risk of water problems, so I've got to swap back in the stock intake if I'm going wheeling anywhere wet, and (b) I find the new sound so appealing that my inner child insists I mash the gas pedal to get it, and that's going to kill my mpgs.

So, all in all, it was an easy install that has apparently produced modest performance results along with a neat sound change. I wouldn't recommend paying $270 for it, but if you can acquire one cheaply and install it yourself, it's no worse than many of the other mods we see out there ().

That's my two cents. Questions? Comments? I'm all ears.

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Old 12-28-2010, 09:32 AM   #2
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Thats a pretty good personal review and-

Even if an owner spends $1000-2000 bucks to gain 1/2 mpg-if the different parameters of the addition please the owner--THATS ALL THAT COUNTS !!

It's your jeep and you'll do what you damn well want to do !!!

Thanx for your review, that throaty acceleration sound is one of the reasons I went with the Flowmaster 40 cat-back-I LIKEM LOUD !

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Old 12-28-2010, 09:44 AM   #3
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Here's another option for getting the sound without the risk of hydrolock.

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Old 12-28-2010, 09:49 AM   #4
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Quote:
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it's no worse than many of the other mods we see out there ().
Hey! some people want their jeeps to look like hummers


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Old 12-28-2010, 09:53 AM   #5
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Originally Posted by daggo66 View Post
Here's another option for getting the sound without the risk of hydrolock.
I was thinking about that same video driving in today! It would indeed keep my risk of hydrolock at stock levels. I'd love to see someone who actually just drives around with a SoundRacer at all times, telling passengers not to touch the radio controls, etc.
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Old 12-28-2010, 09:56 AM   #6
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Originally Posted by Cons_Table View Post
Hey! some people want their jeeps to look like hummers
I never noticed the similarity! You're right, I believe. I just think that, as a general rule, mods shouldn't include the word "Applique." I'm sure there are exceptions, but in general, any "applique" is out as far as my Jeep is concerned.
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Old 12-28-2010, 09:56 AM   #7
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^ hummer
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Old 12-28-2010, 10:39 AM   #8
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I never noticed the similarity! You're right, I believe. I just think that, as a general rule, mods shouldn't include the word "Applique." I'm sure there are exceptions, but in general, any "applique" is out as far as my Jeep is concerned.
Ain't it the truth..... The only "appliques" that belongs on a Wrangler are stickers...
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Old 12-28-2010, 10:43 AM   #9
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That hood deal should be banned..
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Old 12-28-2010, 11:03 AM   #10
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To limit the risk of hydro locking, disconnect the air tube from the throttle body before going through deep water. This is recommend by Jeep Jamboree no matter what intake is installed.
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Old 12-28-2010, 11:12 AM   #11
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How does that help? You then have an open intake.
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Old 12-28-2010, 01:15 PM   #12
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I'm guessing he means it wouldnt work without the intake connected, thus rendering the vehicle unable to attempt the 'deep water' crossing?
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Old 12-28-2010, 02:16 PM   #13
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I'm guessing he means it wouldnt work without the intake connected, thus rendering the vehicle unable to attempt the 'deep water' crossing?
Unless the sensor in the intake tube would somehow preclude operation, I don't know why the Jeep wouldn't run.

Assuming that's not the case, my guess would be that by disconnecting the intake hose the intake is effectively relocated to directly above the engine block. I'd expect that's a tougher spot for water to spray into than the stock location for the air filter.

Of course, with the hose disconnected you're also pulling in unfiltered air directly into your engine. I wouldn't think that's a good thing to do for very long (or at all), particularly in dusty/dry areas.

That's my guess.
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Old 12-28-2010, 02:31 PM   #14
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Unless the sensor in the intake tube would somehow preclude operation, I don't know why the Jeep wouldn't run.

Yeah, havent had my jeep that long, thats me assuming the mass air flow sensor is connected right after the airbox, and given the level of computerization on the JK that it's information would be necessary for the engine to run? But, I could be totally wrong.
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Old 12-28-2010, 02:45 PM   #15
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It means the air intake is at it's most highest spot. Having the air filter disconnected for a short amount of time won't cause any damage.
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Old 12-28-2010, 06:45 PM   #16
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I removed my K&N intake after a trip to MOAB and a couple of water crossings that worried me. I personally haven't noticed any difference in mileage or power since putting the stock intake back on.
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Old 12-29-2010, 06:04 PM   #17
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For what it's worth, your understanding of the intake, and possible hydrolock from your new AEM CAI, is half the battle.

You know there is a possibility of water getting in, just take it easy.
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Old 12-29-2010, 06:09 PM   #18
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Do you remove the stock air intake horn when installing this type of intake? I'm trying to understand why changing out to the different intake would make water getting more of a concern.
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Old 12-29-2010, 06:27 PM   #19
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Thanks MTH for the info. Its stuff like this that keeps me coming back to the forum. (The jokes are nice sometimes, too.)
Anyone know what else can be done to a stock jeep that could improve performance or mpg?
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Old 12-29-2010, 06:29 PM   #20
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Do you remove the stock air intake horn when installing this type of intake? I'm trying to understand why changing out to the different intake would make water getting more of a concern.
Open filters, not enclosed, and fan throwing H2O right at it.
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Old 12-29-2010, 06:32 PM   #21
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Would air intake improve MPG?
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Old 12-29-2010, 07:39 PM   #22
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Quote:
Originally Posted by ESP123
Do you remove the stock air intake horn when installing this type of intake? I'm trying to understand why changing out to the different intake would make water getting more of a concern.
Yes, the stock horn comes out. In fact, everything back to the throttle body comes out, and I bet that if you saw it in person, you'd see the issue immediately.

The opening on the stock horn where the air enters is only about 4x1". Even this small opening is of course much maligned for its likelihood to take on water as a result of it's placement. Now take a look at the pic I posted at the beginning of the thread. See that big red conical thing? That's the new filter. Aside from a steel heatshield from underneath it, there's no horn around it at all. That entire cone sucks air through it. It can plainly pull in gobs more air than the stock horn.

However, whereas a splash on the stock horn would have done nothing unless it landed precisely in that 4x1" area, a splash in the same spot on this filter would land on the cone filter, and pass straight through into the intake tube.

Make sense?
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Old 12-29-2010, 07:54 PM   #23
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Originally Posted by j33pZ
Thanks MTH for the info. Its stuff like this that keeps me coming back to the forum. (The jokes are nice sometimes, too.)
Anyone know what else can be done to a stock jeep that could improve performance or mpg?
No problem--just trying to do my part here.

There are some things for reasonable cost. Need more info though on your Jeep. Manual or auto? Stock tires or bigger? Either way, if you've got an auto, search the forum for "flashpaq" or "superchip" and see what you get.

Quote:
Originally Posted by Mile High 4wheeler
Would air intake improve MPG?
Perhaps, but I truly don't know. If I had to guess, it would be "none to very little improvement"--particularly because I mash the gas pedal more to get the grumble made by the intake.
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Old 12-29-2010, 08:11 PM   #24
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Ok I gots it now. Did you find out anything about the PCM update for your Jeep?
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Old 12-29-2010, 08:41 PM   #25
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Ok I gots it now. Did you find out anything about the PCM update for your Jeep?
Nope. Sport Durst didn't call me back. They got until tomorrow and then I'm going to your place.
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Old 12-30-2010, 07:15 AM   #26
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Anyone know what else can be done to a stock jeep that could improve performance or mpg?
If you're trying to get more air into the engine, try swapping out the stock throttle body for a Viper TB. It's an easy swap (direct fit) and is much larger bore. Works best with a tuner and aftermarket exhaust, but I see a difference with just the TB swap (about 1.5 MPG and way better throttle response).
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Old 12-30-2010, 08:16 AM   #27
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Originally Posted by willywaxer

If you're trying to get more air into the engine, try swapping out the stock throttle body for a Viper TB. It's an easy swap (direct fit) and is much larger bore. Works best with a tuner and aftermarket exhaust, but I see a difference with just the TB swap (about 1.5 MPG and way better throttle response).
Really? This sounds suspiciously like the infamous "throttle body spacers", a.k.a, paperweights . . . .
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Old 12-30-2010, 06:11 PM   #28
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Comparing a larger bore TB to a TB spacer addition is like comparing a dollar to Monopoly money. They aren't even the same thing. Do a little digging on other boards. The Viper part is a direct replacement and totally changes throttle response.
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Old 12-30-2010, 10:59 PM   #29
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What is a viper TB? Where do you get one? How much does it cost? Anyone else heard of this?
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Old 12-30-2010, 11:46 PM   #30
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I call bs on a cold air letting any more water in than a stockbox. I have tons of buddies with Tjs that slam into water holes and none of them have ever hydroed. I had a nissan xterra and a cheapodeapo cai on it and i abused the hell outta that thing and I never even stalled it. I did however watch a friend bounce his cherokee through a deep mud hole and stall out his jeep. Once we took the stock intake off there was muddy water all around the throttle body, but after several attempts to start, it finally fired up. I look at it like this, a cold air intake may not be as sealed as a stock box, but it also allows water to immediately pass through the bottom of the filter where a stock box can only drain as fast as big as your drain holes are. This means that there can be a standing body of water in your airbox the second something clogs that hole up. Im not saying a cai is better, i just think the whole rationale behind a cai being worse in splashes than a stock system cant really be proven without on the trail evidence. I have a stockbox and dont plan on changing it because i have 35s and steel all over my jeep and wouldnt get any power anyways. If you like the noise, more power to you!

Sorry if my grammar and spelling is awful, but im on an iphone.

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