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Old 06-07-2010, 07:56 PM   #31
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Good, bad or indifferent, I keep the water out of my AFE CAI by not going 50 MPH thru stream crossings because you never know what's just under the surface.

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Old 06-13-2010, 09:10 PM   #32
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Anybody looking to know exactly what air intake to choose, refer to the February 2010 issue of 4x4 Garage - TJ edition; page 34 titled "Intake Shootout" writen by Pete Trasborg, this is dedicated to testing a bunch of aftermarket intakes on the TJ 4.0 6 cylinder engine. The results show:

Stock:
ave. peak torque = 188 lb-ft
ave peak hp=142.3hp
all do respect to what everyone has said the magazine even states under the cons about stock setup, quote "doesnt flow that well"

No intake or filter(not recommended, test was done just to see what they got when it was all removed)
ave peak torque=192.3lb-ft
ave peak hp=150.1
"cons: no filter means lack of engine longevity, very easy for water to get into the engine, manifold burritos will be sucked into the engine"

AEM Brute Force Intake
ave peak torque 198.4
ave peak hp 155.1

AFE Magnum Force CAI
ave peak torque 199.3
ave peak hp 153.0

Airaid cool air dam intake system
ave peak torque 200.9
ave peak hp 154.0

Banks ram air intake system
ave peak torque 197.2
ave peak hp 152.7

injen jeep intake with mr technology
ave peak torque 197.4
ave peak hp 152.4

k&n fuel injection performance kit
ave peak torque 198.5
ave peak hp 153.8

mopar cold air intake system
ave peak torque 199.8
ave peak hp 155.6

pacesetter air f/x performance intake
ave peak torque 197.9
ave peak hp 151.7

rock it parts intake kit
ave peak torque 197.3
ave peak hp 152.3

rustys off road airtube
ave peak torque 191.6
ave peak hp 146.9

i recommend this issue to any tj owner, it is amazing and you will be able to read each intakes pros and cons their price msrp and so much more on the tj and aftermarket test!

log onto SIMBackissues if you want to find it

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Old 06-13-2010, 11:36 PM   #33
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Do you think that they wouldn't diss CAI's because they're advertisers?
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Old 06-16-2010, 11:17 AM   #34
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take it for what it is, i dont care...i have no problem with mine and i had the airaid cai long before this publication came out. ive gotten stuck in mud, thrown mud everywhere in under my engine bay and everything except for going through water, obviously, and there are absolutely no clogs and the filter isnt dirty at all. for the power aspect i believe what they are reporting because I have a kiwi gas mileage gauge and i did notice a difference in my gas mileage (increase). so whether its an advertisement or truth or mixture of both...so be it, i love mine and wouldnt go back...just my opinion
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Old 06-16-2010, 11:33 AM   #35
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Every CAI listed shows an improvement in peak torque & HP, which usually occurs up around 5000 RPM with a wide open throttle.

Down around 2000 - 2500 for regular driving the stock setup is flowing just fine.
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Old 06-16-2010, 11:58 AM   #36
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Quote:
Originally Posted by tjjeepers View Post
Anybody looking to know exactly what air intake to choose, refer to the February 2010 issue of 4x4 Garage - TJ edition; page 34 titled "Intake Shootout" writen by Pete Trasborg, this is dedicated to testing a bunch of aftermarket intakes on the TJ 4.0 6 cylinder engine. The results show:

Stock:
ave. peak torque = 188 lb-ft
ave peak hp=142.3hp
all do respect to what everyone has said the magazine even states under the cons about stock setup, quote "doesnt flow that well"

No intake or filter(not recommended, test was done just to see what they got when it was all removed)
ave peak torque=192.3lb-ft
ave peak hp=150.1
"cons: no filter means lack of engine longevity, very easy for water to get into the engine, manifold burritos will be sucked into the engine"

AEM Brute Force Intake
ave peak torque 198.4
ave peak hp 155.1

AFE Magnum Force CAI
ave peak torque 199.3
ave peak hp 153.0

Airaid cool air dam intake system
ave peak torque 200.9
ave peak hp 154.0

Banks ram air intake system
ave peak torque 197.2
ave peak hp 152.7

injen jeep intake with mr technology
ave peak torque 197.4
ave peak hp 152.4

k&n fuel injection performance kit
ave peak torque 198.5
ave peak hp 153.8

mopar cold air intake system
ave peak torque 199.8
ave peak hp 155.6

pacesetter air f/x performance intake
ave peak torque 197.9
ave peak hp 151.7

rock it parts intake kit
ave peak torque 197.3
ave peak hp 152.3

rustys off road airtube
ave peak torque 191.6
ave peak hp 146.9

i recommend this issue to any tj owner, it is amazing and you will be able to read each intakes pros and cons their price msrp and so much more on the tj and aftermarket test!

log onto SIMBackissues if you want to find it
So that magazine is trying to say that the AEM Brute Force will give me over 10 ft/lbs of torque and almost 13 horsepower? I call BS on them......

They forgot to add what baseline the engines were being run at.......maybe the stock peak hp comes at 3500 rpm while the AEM peak hp comes at 6500 rpm........not very useable in my mind........


I'm with Jerry on this one. Save your money for something worthwhile. If you want to waste your money on something stupid, buy an H2. I, for one, don't drink the KoolAid.......
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Old 06-16-2010, 12:08 PM   #37
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Sparky - the chart - RPM was not mentioned in the chart.

Typically max torque is around 2500 RPM, not 5000.

Max HP is higher R's, but that's because how the formula for HP works. HP is a theoretical figure, torque isn't.

You can see how RPM affects HP by looking at the formula.

HP = (Torque (ft lbs) X RPM) / 5252

The most difference the better flowing intakes make is at WOT and mid-range RPM.

Funny, my previous post tells how to try it for yourself for free - too difficult or trouble to just disconnect a tube?

You can lead a horse to water ----.
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Old 06-16-2010, 12:30 PM   #38
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Dyno results are so easily manipulated that it's not even funny. In fact, even when you aren't trying to manipulate them, it's hard to get the same results between runs on a dynometer with the same drivetrain configuration.

Automotive magazines have never tested an advertiser's product where they couldn't find something good to say about it or find a way to show dramatic results from using it. It's usually smoke and mirrors to help their advertisers sell product.
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Old 06-16-2010, 01:19 PM   #39
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So true Jerry about the magazines.

Recently I became friends with one of the editors and writers of a major off-road magazine. He's written many articles about our sport for several years.

I found out he's never even been off roading! I took him up near the Hammers - on an easy trail barely needing 4 wheel drive, he was white knuckled! We turned back.

How can he be an authority when he's never even experienced it? I've offered several more times - always "too busy."

Magazines? Bah Humbug!

True also on dynos - especially chassis dynos. If you can duplicate it within 2% you are doing good. The biggest errors stem from temperature - engine, oil, trans, diffs, air, fuel, and tires. I've had 2 myself.

An engine dyno is far more accurate because most of those are eliminated or under better control. Never owned one, but I have used a friend's many times.
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Old 06-16-2010, 05:30 PM   #40
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rrich,
No rpm was not mentioned, but any graph/chart you find by the CAI makers will show it. As an example, he is a selection Jeep Liberty Cold Air Intake - Intakes - K&N - 09 08 07 06 - PartsGeek.com, and yes they only talk HP.
My point still is, down at normal driving RPM, it doesn't matter, a stock setup will provide plenty of air.
The only time you see WOT at mid range RPM is hard acceleration. When do you see that. Blasting through a mud pit, hill climbs.
A daily driver / casual off roader, does not need this setup.
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Old 06-16-2010, 07:23 PM   #41
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X2 on the dyno variation and possible manipulation. I know people at two automotive companies that dyno everything and it would be very easy to adjust those numbers.
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Old 06-16-2010, 11:40 PM   #42
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Or bippin down the highway and encounter a slight rise or an uphill grade.

Hill climbs etc are usually done at higher R's, not mid range.

And of course, you are an expert now that you've tried it!

You did, didn't you?
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Old 06-17-2010, 09:58 AM   #43
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You're running full throttle down the highway, and for slight rises?
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Old 06-17-2010, 12:43 PM   #44
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Now isn't that an intelligent statement?

Obviously it won't work on yours. Whatever you do - DON'T TRY IT!
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Old 06-17-2010, 01:34 PM   #45
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That was a question about your statement
"Or bippin down the highway and encounter a slight rise or an uphill grade."

I did try your suggestion. Popped the tube off the TB and took a drive. It did not feel any different from before.
4.0 six with a manual
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Old 06-17-2010, 01:54 PM   #46
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Quote:
Originally Posted by sparky View Post
Popped the tube off the TB and took a drive. It did not feel any different from before.
Exactly, the 4.0L gets all the air it needs and could possibly consume through the OE air intake system.
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Old 06-17-2010, 03:50 PM   #47
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I didn't know there was Chrysler stock since its owned by a private equity firm since Daimler sold out. I guess with Fiat as a partner you could buy their stock but still not have Chrysler.
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Old 06-17-2010, 04:30 PM   #48
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I'm glad I dumped it - put my money where it's better off. Jan it was 15-20 cents, today .51.

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