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Old 01-09-2011, 08:32 PM   #1
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cold air intake

I am looking to put a cold air intake in my 01 TJ sport because im looking to save some gas mileage, even if it is a tiny bit. one question, what all do i need? I mean i know what a cold air intake is but ive only seen them done in trucks and cars in person. is it any different in Jeeps?

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Old 01-09-2011, 08:34 PM   #2
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The difference is that they dont work in jeeps. because the stock air intake is more than good enough for the 4.0 engine and the 2.5 so there's no way to improve on it. If you just want it to sound good that's another story.

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Old 01-09-2011, 08:34 PM   #3
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so you're trying to save $1 every 250 miles, and the way to do that is install a $300 part? a $300 part that lets dust, dirt and junk into your engine, and still pulls in the same hot air from the engine compartment?

good luck
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Old 01-09-2011, 08:37 PM   #4
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so you're trying to save $1 every 250 miles, and the way to do that is install a $300 part? a $300 part that lets dust, dirt and junk into your engine, and still pulls in the same hot air from the engine compartment?

good luck
no need to be fiesty man, ive only worked on other cars and trucks with them, thats why i asked this quetion. and idt a cold air intake is 300 dollars enless u buy the whole kit, if u dont buy the kit, its less
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Old 01-09-2011, 08:40 PM   #5
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no need to be fiesty man, ive only worked on other cars and trucks with them, thats why i asked this quetion. and idt a cold air intake is 300 dollars enless u buy the whole kit, if u dont buy the kit, its less
here's some reading for ya:
FAQ - Cold Air Intake - JeepForum.com
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Old 01-09-2011, 08:42 PM   #6
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here's some reading for ya:
FAQ - Cold Air Intake - JeepForum.com
thats all what i was asking for, thankss
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Old 01-09-2011, 08:59 PM   #7
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There are many that will poo-poo the idea of CAI's. Then there are many that mke their own going through the cowl (true cold air). This is a shortcut if you do not want to fab up your own from junkyard parts.


Spectre Performance 9943 - Spectre Performance Cold Air Induction Filter System for 97-06 Jeep® Wrangler TJ & Unlimited with 4.0L Engine - Quadratec
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Old 01-09-2011, 10:15 PM   #8
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i have a banks cai on my 05 rubicon. i really do like mine. as far as gas mileage goes i dont know. i never put a pendcil to it, but i do like the throttle response and the way it sounds.
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Old 01-10-2011, 06:25 AM   #9
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Mind had the full K&N kit on it when I bought it
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Old 01-10-2011, 11:39 AM   #10
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I have a throttle body spacer, and a cai is in the future. From past experience (None Jeep vehicles) A cai & tbs make difference in the power, shift points and mileage. To say I got an extra 500hp and 50 mpg, it didn't happen. An extra 1-2 mpg, it happened, and just enough extra power to change the shift points.

Stu Olson's site has a build of putting a cai up through the cowl. I think this would be a true cai.
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Old 01-10-2011, 03:41 PM   #11
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I have the Rugged Ridge CAI with the throttle body spacer on my '05 and I love the throttle response and sound. Got it from Quadratec. I think I'm gonna find one for my '98 also but still considering that.
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Old 01-10-2011, 04:19 PM   #12
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I would advise doing some technical research. A TB spacer CAN DO NOTHING on a fuel injected engine.

Shift points are programmed into the PCM based on RPM and throttle. No affect on air consumption, ait temp or net HP is going to change shift points.
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Old 01-19-2011, 07:16 AM   #13
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Thanks dbbd1 , that was a good link ! Spectre Performance 9943 - Spectre Performance Cold Air Induction Filter System for 97-06 Jeep® Wrangler TJ & Unlimited with 4.0L Engine - Quadratec
I have been looking at the banks, cause it is mostly enclosed, but this cold air kit looks nice ! Has anyone done this where you drill a hole in the firewall/cowl? I drilled a hole in the roof of my house once to put in an attic fan, can't be any worse, right? Is this design better for keeping out muddy water/dirt ? Thanks for any help on this cold air from the cowl idea.
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Old 01-19-2011, 09:45 AM   #14
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U don't see much increase on the tj but u do on a yj. The tj box is already moved away from the exhaust manifold allowing cooler air to enter anyway. Not so on a yj hence the increase. But if u want to go that route just make one and save some cash. I made mine for $30. Plus I put a turbo exhaust on mine ( more air in more air out)
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Old 01-19-2011, 02:45 PM   #15
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Hmmmm...I like the idea but what happens if it rains...I mean I'm in Ohio, its not gonna monsoon, but would anyone be worried about all the water your motor would be sucking up if it was pouring down rain??
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Old 01-19-2011, 03:53 PM   #16
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Hmmmm...I like the idea but what happens if it rains...I mean I'm in Ohio, its not gonna monsoon, but would anyone be worried about all the water your motor would be sucking up if it was pouring down rain??
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Old 01-19-2011, 04:09 PM   #17
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I have seen them all and installed them all as a manager for 4 wheel parts (in the past) and I would have to say if you go through a lot of mud go witht the Banks CAI. bc it is enclosed and protects it form water and mud. If you just want your motor to breath better, I read a article in JP magazine that said AFE CAI produced the most power and whould most likely get you the most gas mileage. From my own personal experience my previous Wrangler was a 98 4.0 and i put a snorkle with a K&N filter and saw gains of 2mpg believe it or not I was getting 18mpg on 35's with 456 gears. I beleve it has to do with the cleaner colder air a snorkle can give you. So if you like the way those look that would be your best bet im sure. And I would like to recommend a EDGE programmer and throttle body set up which I now have on MY current TJ and I really think it is awesome it really wakes a Jeep up. It really helps get my 37's turning, and better milage too I get 17mpg w/o a cold air intake. But w/ Fabtech exhaust.
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Old 01-19-2011, 04:18 PM   #18
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I read a article in JP magazine that said AFE CAI produced the most power and whould most likely get you the most gas mileage.
Did you miss this part of the article?
Quote:
Originally Posted by Pete Trasborg from JP Magazine
Sometime between the last test and this one, we had formed a working theory that it wasn't so much the air filter as the air tube that makes the power in these kits. With most, if not all, aftermarket air intakes, the air filter itself can flow more air than the Jeep can use. Sure, there are varying degrees of restriction from one filter to the next, but on a stock 4.0l engine we just aren't convinced that a significant result will be seen at the wheels from the air filter alone.
from: Jeep TJ Wrangler - Intake Shootout - Jp Magazine

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It really helps get my 37's turning, and better milage too I get 17mpg w/o a cold air intake. But w/ Fabtech exhaust.
What gears, engine & tranny you running with those 37s?

With a 4.0L, 5-speed that should be 5.13s, with a 3-speed auto probably 4.88s, and with a 4-speed 42RLE, probably 5.89s. If you really want to wake your jeep up, install proper gearing.
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Old 01-19-2011, 05:18 PM   #19
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While spacers can perform miracles when placed under a carburetor or the older style throttle body injection systems, they do nothing for the type of throttle bodies used on 1991 and newer jeeps. Modern throttle bodies pass nothing but air so making that airpath longer will do nothing for performance.

And personally, I would not waste my money on CAI system either.
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Old 01-19-2011, 06:43 PM   #20
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I installed a Mopar CAI when gas prices went up a couple of years a go and didn't notice much of a difference. I'd save your money for the gas.
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Old 01-19-2011, 08:22 PM   #21
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I made my own cowl intake. My jeep had a TB spacer and a K&N cold air intake on it when i bought it. I Noticed a diff going from the K&N to the cowl intake. I had to keep the TB spacer on to make the XJ TB elbo clear the valve cover so i dont have any before and afters on it. Plus it looks damn cool with the intake coming out of the cowl..

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Old 01-20-2011, 07:00 AM   #22
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Does anyone have this Spectre Performance 9943 - Spectre Performance Cold Air Induction Filter System for 97-06 Jeep® Wrangler TJ & Unlimited with 4.0L Engine - Quadratec __________________?? I have read that there is a hissing noise cause its sucking air from the cowl right in front of the driver?? I am NOT expecting big, or ANY H.P. gains, so please no bashing, ok? Just like the idea of a little cold air, and maybe raising the height of intake in case i go swimming( I've been known to do some pretty stupid things) So.... does anyone have this spectre? How loud is the hissing? What about the windstar air intake conversion I have seen pics of on here? Is that one a hisser too? Thanks for any help guys
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Old 01-20-2011, 09:24 AM   #23
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Quote:
Originally Posted by UnlimitedLJ04 View Post
Did you miss this part of the article?

from: Jeep TJ Wrangler - Intake Shootout - Jp Magazine



What gears, engine & tranny you running with those 37s?

With a 4.0L, 5-speed that should be 5.13s, with a 3-speed auto probably 4.88s, and with a 4-speed 42RLE, probably 5.89s. If you really want to wake your jeep up, install proper gearing.
I dont know what kind of experience you have but im a Master Technician w/ Chevy and I was a service manager w/ 4 Wheel Parts for 5 Years. I had 488's in my Jeep b4 but could only drive 65-70 mph with out my motor screaming down the hwy and constantly watching the fuel guage fall. So I regeared it my self something I've done hundreds of times on other Jeeps and many other vehicles makes and models. I choose to get my final drive gearing on the low end from a teraflex NP231 low gear upgrade so I can still drive my 4.0 stock 5 speed with a 8in Fabtech Rock Crawler lift w/ 1in coil spacer and 1in body lift for a total of 10in of lift on the why at 80mph. Even at 80 I get 17mpg.And I'll tell you bc everyone asks it drives like a Cadi. its all in the alignment or to be more specific in the caster. And I suppose I did miss that part of the article I dont agree with it. A motor really cant have to much air Google superchargers sometime. But I know where your coming from and what you mean. Yes at some point the motor cannot suck any more air in its stock configuration which means if your TJ is not stock, ie exhaust or a programmer or header you probably will pass the point at which the JP artice was reffering. I will be installing and 5.3 w/ a 4L60E trans this year and G2 Dana 44's. So the 4.0 performance really is out the window at this point I've out grown it. I dont know what gear will be perfect for that set up for me and my needs. I'll keep the breakage prone Dana35 (which I've blown up twice, or I should say my wife lol) in there with the 456 gears for a month or 2 just to get a feel for what I need to order. And please do not respond that I'm going to blow up my new Dana 44's w/ chromoly axles and Ox lockers bc of the V8. If that is what you are thinking all I have to say is that many of the Jeeps in 4Wheel off Road mag. participated in the Ultimate Adventure with simular setups and had little or no breakage. And if I break it I'll fix it myself, sell it and break the bank to get a G2 Dana 60.
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Old 01-20-2011, 10:23 AM   #24
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The picture - Is that the stove pipe from a pot belly stove under the hood?
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Old 01-20-2011, 08:38 PM   #25
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A TB spacer may make a possible advantage similar to the way a variable length intake manifold works (very little/hard to notice/not worth it). Ide personally look into a new muffler or catback for better gas mileage before a CAI on a jeep. The exhaust shrinking from 2.5 to 2.25 after the cat can't help with HP and gas mileage. After installing my cat back i have noticed fewer times I have had to downshift out of 5th and LOVE the new sound
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Old 01-20-2011, 08:54 PM   #26
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I dont know what kind of experience you have but im a Master Technician w/ Chevy and I was a service manager w/ 4 Wheel Parts for 5 Years. I had 488's in my Jeep b4 but could only drive 65-70 mph with out my motor screaming down the hwy and constantly watching the fuel guage fall. So I regeared it my self something I've done hundreds of times on other Jeeps and many other vehicles makes and models. I choose to get my final drive gearing on the low end from a teraflex NP231 low gear upgrade so I can still drive my 4.0 stock 5 speed with a 8in Fabtech Rock Crawler lift w/ 1in coil spacer and 1in body lift for a total of 10in of lift on the why at 80mph. Even at 80 I get 17mpg.And I'll tell you bc everyone asks it drives like a Cadi. its all in the alignment or to be more specific in the caster. And I suppose I did miss that part of the article I dont agree with it. A motor really cant have to much air Google superchargers sometime. But I know where your coming from and what you mean. Yes at some point the motor cannot suck any more air in its stock configuration which means if your TJ is not stock, ie exhaust or a programmer or header you probably will pass the point at which the JP artice was reffering. I will be installing and 5.3 w/ a 4L60E trans this year and G2 Dana 44's. So the 4.0 performance really is out the window at this point I've out grown it. I dont know what gear will be perfect for that set up for me and my needs. I'll keep the breakage prone Dana35 (which I've blown up twice, or I should say my wife lol) in there with the 456 gears for a month or 2 just to get a feel for what I need to order. And please do not respond that I'm going to blow up my new Dana 44's w/ chromoly axles and Ox lockers bc of the V8. If that is what you are thinking all I have to say is that many of the Jeeps in 4Wheel off Road mag. participated in the Ultimate Adventure with simular setups and had little or no breakage. And if I break it I'll fix it myself, sell it and break the bank to get a G2 Dana 60.
Just curious, where are you located?
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Old 01-20-2011, 11:55 PM   #27
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not exactly cold air but had the 2 filters layin around and mine needed replaced so i put them in
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Old 01-21-2011, 01:05 PM   #28
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Good info to ponder. I did buy the Rugged Ridge Polished Aluminum Air Intake Kit Now after putting it on and reading more about info on it to really get my money's worth I should also put a new muffler on with a better output. Air in is only as good as your air out.

My problem is what is a good yet affordable exhaust system to go along with the CAI I got but now be so loud that I drowned out my radio.. lol

Thanks
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Old 01-23-2011, 06:27 AM   #29
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My problem is what is a good yet affordable exhaust system to go along with the CAI I got but now be so loud that I drowned out my radio.. lol

Thanks
I put a Cherry Bomb glasspack on my 99 Sport i6. It growls a lil more than stock but i cant still talk on the phone or to the person riding with me no problem, as for the radio, i have mine cranked up anyway.
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Old 01-23-2011, 06:48 AM   #30
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A cherry bomb glass pack is a "little" louder than stock? Is that like saying your girlfriend is "kinda" pregnant?

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