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Topic Review (Newest First)
10-23-2011 07:29 PM
2JeepsThatRun Does any one know if this would fit on a 2.5l with a 4.0s throttle body?
09-02-2011 10:43 AM
IslandTJ Meh, IMO the only reason to replace a Jeep's stock airbox is to make space for OBA. Anything else, is time and money expended.
09-02-2011 10:24 AM
Originally Posted by Six Gun Matt View Post
Before and after Dyno tests showed 11 hp gain over stock, which is noticeable. T
That is BS. I have the sepctre intake and I did 18 dyno pulls with different tests during the intake install. There are no statistical gains. It runs pretty loud. Cold starts are the worst and you can really hear it sucking air. The sound bounces off the roof of my garage. At WOT it sounds bad ass, not too loud, but enough that it sounds cool. My reasons for doing this intake are as follows.
1. make room for a fender lift.
2. too lazy to find junk yard parts that fit.
3. another reason to play with the dyno and verify, or call BS on their claims.
4. To get fresh cowl cold air.

#4 is the best reason for a cowl intake. My IATs dropped substantially and run about 10* over ambient. This will cause a gain in hp under certain conditions that would be difficult or impossible to measure on the dyno. It really lowers the IATs while going slow offroading. I have seen IATs of 175F while the stock intake is sucking that nice fresh air off the back of the radiator.

I'm going to install a 90* elbow inside the cowl to cut down on the sound, and install one of the cab filter cowl scoop things (maybe 2 of them). Then I'll have a double filter, and the in-cab HVAC will be filtered as well.

Here is my testing data.
Jeep Wrangler 18 dyno pulls for CAI testing - Trick Tuners Forums
09-01-2011 03:51 PM
Beowulf Here where you can pick up the mushroom snorkel head.

Tisco Tractor Part Mart: Reliable Tractor Parts You Need. Fast :: PRECLEANER (C5NN9A660A)

Matt Savage Land Rover Parts Raised Air Intakes
04-11-2011 09:11 PM
Hawk Driver
Spectre CAI

I bought an 04 TJ Unlim. which had one already installed. I owned a '00 sport before this. Same engine. I DO notice a difference between the acceleration of this jeep vs my other. What I'm looking for now is a way to snorkel this sucker so that I don't have to keep cleaning my air filter every time I get muddy. Something to think about though is IF it does introduce cooler air, this will definately help over the life of the engine. You add a louvered hood and you may extend the life of your engine for many miles.
03-25-2011 11:27 PM
99TJCrawler I have one of these. It will not get you better mileage.
03-25-2011 10:38 PM
s3nt3nc3d What mixture? Our engines are fuel injected, not carbureted. The intake only allows air into the system...the air and fuel aren't mixed until they enter the cylinders. A cold-air intake on our engines will have no significant effects on fuel economy.
03-25-2011 09:45 PM
eric_b993 Does anyone know what this does for mileage? It should increase efficiency by making the mixture burn better, but does it?
01-29-2011 11:13 PM
99TJCrawler Just installed it yesterday. I don't feel a real difference to be honest. I didn't expect a lot out of it. The throttle response seems a little snappier. The biggest benefit for me, as I stated earlier, was gaining the space where the intake box used to be. Right now, I'm working on how to turn this into a snorkel. Shouldn't be too difficult to do. Just so you know, the hole you need to drill in the firewall IS NOT in the dead center. Make sure to read the instructions. I did not read them but fortunately, I made the hole on the passenger side anyways lol. That could have been really bad. Like I said, instructions are your friend. Overall, the install was very simple. It makes it easier if you take off the hood also. Anyone know where I can get a snorkel head from w/o having to buy the kit?
01-27-2011 05:57 PM
sandro thanks six gun matt, and 99 tj crawler, i was guessing to use black silicone, please get back to us and let us know how you like it, does it make noise, etc.
thanks again, i live vicariously through you until i can do this to mine. (still at engine shop in pieces) week 4 now
01-27-2011 05:52 PM
99TJCrawler Holy crap! That is awesome! Your going to put a freaking welder where the air box was?! Your like a mad scientist or something! Now I want a damn welder on my car! Make sure to post those pics!
01-27-2011 01:53 PM
acrijos I am using the spectre as the basis for home built hummer type snorkel. I cannot install a "normal" snorkel as the ARB as I have a Premier Power Welder in the place where the OEM airbox used to be. As soon as I finish, I will post pictures.
01-27-2011 12:32 PM
99TJCrawler Btw, drilling the hole isn't that big of a deal. Just make sure the hole is the size of the tubing, (3") and use black silicone gasket maker to make a seal on it. The tubing does not go into the passenger compartment and you will not be drilling into the passenger compartment so it will not cause problems.
01-27-2011 12:28 PM
99TJCrawler I am installing it sometime this week so I will give you some feedback on it.
01-27-2011 10:01 AM
Six Gun Matt Spectre actually installed one on my TJ, as noted above. Yes, it does make a whistling noise at certain points related to RPMs, speed, and throttle position. It's not really a constant loud whistling, but there is a very slight constant hissing. It doesn't bother me at all, I think it sounds kinda cool, but that's just me. It's not like you have to wear ear plugs or anything. In fact my exhaust is far more distracting than the intake. But be prepared for some sort of noise, it's a given.
01-27-2011 08:59 AM
sandro 99TJCrawler, Please tell me, does it make that hissing sound I read about? Is there anything at all as far as throttle response? Anything? I'm very reluctant to cut a hole in my firewall, but this seems like true cold air, vs. the K&N style cone under the hood type? I know my truck runs better on a cold morning, so i was hoping this would help my jeep just a hair? Any input you have is appreciated, thanks
01-26-2011 09:48 PM
99TJCrawler I just bought one of these and I understand where you guys are coming from. The reason that I bought it was 1) as stated previously, it frees up that space where the air box used to be so that I can finally put in my manifold for my on board air, 2) It seems pretty simple to make a snorkel from this kit if you were to run some tubing under the cowl and up the passenger side and if you ever wanted to get rid of it, you could just replace the cowl panel instead of your fender. Little cheaper than buying a snorkel and looks better. If I was suggesting this kit to someone, or any kit for that matter, I would tell them not to expect any horsepower.
01-26-2011 07:34 PM
sandro I like the idea of cold air...i like the idea of a higher intake... i DON'T want anything loud, and i've read that these things can make a hissing sound that is audible from the cabin while driving? Having said that...I'm the guy who would paint a pink stripe on my hood and paste a michael jackson bumper sticker on if it would give me another 10 horse power, so... if anyone has one of these things, please let us know what you think ! Also, I am intrigued about the idea of having a couple of beers and cutting a 3" hole in my firewall with a saws all....that can never be fixed...idk
07-13-2010 02:18 PM
Six Gun Matt
Originally Posted by Jerry Bransford View Post
...They might have told you that or they might have told you about an 11 hp gain on a different engine but I don't believe it with the TJ 4.0L engine...

...The TJ's air intake is completely free breathing with no restrictions like some engines have. So when the factory OE air intake system is already capable of delivering more air than the engine can consume, offering it more air won't make a difference...
I don't disagree with you because I know nothing about dyno tests and certainly all of the arguments you pose should be considered into the decision in doing a mod like this. Whatever hp was gained or not, it seems like there is a difference in how the engine runs, which to me is nice.

All the more reason I never even considered this mod before. But I do have to say I was more intrigued by the other features I mentioned before and schnutzy pointed out another feature that will prove beneficial when I move forward with body armor. The added bonus of potential power increase is nice, but at least to me, is the lowest on the list of benefits.
07-13-2010 01:08 PM
schnutzy the only reason i see to instal an aftermarket intake, is if you have high clearance tube fenders that cause the stock intake to no longer fit.
07-13-2010 01:05 PM
Jerry Bransford
Originally Posted by Six Gun Matt View Post
Before and after Dyno tests showed 11 hp gain over stock, which is noticeable.
I don't want to pick an argument but I find an 11 hp gain on a TJ 4.0L engine from that product alone totally unbelievable unless the old filter was clogged with dirt. They might have told you that or they might have told you about an 11 hp gain on a different engine but I don't believe it with the TJ 4.0L engine. That engine came from the factory with a totally non-restrictive air intake system.

First, dyno tests not exactly highly accurate or repeatable... you can run the same engine three different times through a dyno and get three different results. Second, dyno tests are VERY easily manipulated to produce the results you want to show. Third, even the couple 4x4 magazine tests I have read showing some sort of dyno gain with aftermarket air intakes never showed gains anywhere near 11 hp. And finally, 4x4 magazines never tested an advertiser's product they didn't like so it's not like even those tests are reliable.

The TJ's air intake is completely free breathing with no restrictions like some engines have. So when the factory OE air intake system is already capable of delivering more air than the engine can consume, offering it more air won't make a difference.

Installing an aftermarket air intake onto a 4.0L engine is, in my personal opinion, like inserting a big funnel into your mouth in the belief you'll be able to breathe more air in and thus be able to run faster.
07-13-2010 10:16 AM
Six Gun Matt Well, I have to chime in here, because I was actually the lucky one that was picked by Spectre for a magazine article install of this exact system. I had always said that I wouldn't want to spend money on a CAI, so when the opportunity rose to try this out, I was very curious. Before and after Dyno tests showed 11 hp gain over stock, which is noticeable. There are a couple of other advantages other than just horse power gains, such as opening up the stock air box location to allow for the (future) install of a York compressor system in addition to my existing a/c system using the Kilby kit, which wouldn't be possible without modifying the air box.

It also does raise the air inlet point by several inches, which actually does decrease the risk of sucking up water when going through deeper water. Where this system actually enters the cowl is not directly under the openings in the cowl, so rain and water coming over the hood is not as likely to enter the system as you might think. Besides, if you are going through deep enough water that you would have water over the hood, your stock air box is already under water. A splash of water over the hood would not get into the air system easily.

So if someone asked me if I would pay for this or do it again, it's hard to say. There are so many other things to do on my list that this probably wouldn't take priority. But if you were looking to do a CAI I think this system is better than the other CAI systems out there that use the stock filter location.
07-12-2010 03:10 PM
530ktm That thing is a joke.
07-12-2010 02:26 PM
Jerry Bransford
Originally Posted by rbraden1970 View Post
I'll save the money for the rock sliders that I want.
Great decision.
07-12-2010 01:27 PM
rbraden1970 Thanks jerry, the bling is probably what caught my eye at first. I will probably just see what I get into and if a ever am that concerned with water I will go the way of a snorkel. I really didnt care about the any power gains just were it pulled fresh air from. I'll save the money for the rock sliders that I want.
07-12-2010 01:23 PM
Jerry Bransford I finally clicked on your link and what a contraption (crock, to be blunt). I think they went for visual bling over anything else. Prime example is the stainless steel mesh covering the rubber hose that does nothing more than provide a non-pressurized vent for crankcase ventilation. Pure bling.

After reading their tripe, I wouldn't touch it. Save your $$$ and put it into something that will actually provide some measure of benefit to your Jeep. No engine mods in that price range provide any real performance benefits for the TJ engine.
07-12-2010 01:22 PM
Neil F. Don't spend 200 on that. You can build your own a lot cheaper using a Ford Windstar (also available on Ranger, Explorer, F150 and other), Hummer intake, Buick filter box. There is a recent thread here for a Windstar. Spectra sells the canister seperately for 50 or so and you can buy/fabricate tubing
07-12-2010 01:14 PM
rbraden1970 It looks like it is a cone style that fits in the part that runns parallel to the valve cover on the way back to the firewall
07-12-2010 01:12 PM
Cons_Table Where is the filter even located in that system?

EDIT: Nevermind, I found it
07-12-2010 01:10 PM
rbraden1970 I agree with you but like the idea that it pulls are from the cowl. I always get a little nervous when I see water come up over the hood. I dont drive in stuff that deep but some times going through high water a little fast it is pushed up over the hood for a moment. I guess I could slow down and I ussually do at that point.
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