Cold Air Intake? - JeepForum.com

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post #1 of 21 Old 01-24-2012, 08:16 PM Thread Starter
handy3030
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Cold Air Intake?

Does anyone have any recommendations on a nice and good cold air intake for a 2004 grand cherokee 4.0 LS

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post #2 of 21 Old 01-24-2012, 08:25 PM
ezflip
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No such thing. You can get a k&n or make your own, but its going to be a warm air intake and wont do much if anything at all as far as performance.

~James
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post #3 of 21 Old 01-24-2012, 08:57 PM
thisguyhasadd2
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i run dry ice in my stock airbox

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post #4 of 21 Old 01-24-2012, 09:00 PM
pinky2252s
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Quote:
Originally Posted by thisguyhasadd2 View Post
i run dry ice in my stock airbox
I thought about that for a second, thought it would work, but then i thought harder and realised that dry ice emits CO2, so... your engine most likely wouldnt even start. Hah.

Funny though.
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post #5 of 21 Old 01-24-2012, 09:01 PM
peytonimor7
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Quote:
Originally Posted by thisguyhasadd2 View Post
i run dry ice in my stock airbox
I've already got one of your quotes in my sig... you just keep em comin! LOL

l 04 WJ l OME HD+3/4" spacers l Bilstein 5100 l 245/70/17 Firestone M/Ts l IRO A-Arm & CAs F & R l
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post #6 of 21 Old 01-24-2012, 09:40 PM
WeThePeople408
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Recently installed a K&N on my 4.0

http://s1068.photobucket.com/albums/...Engine%20Mods/
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post #7 of 21 Old 01-24-2012, 10:05 PM
Voltage258
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I got a K&N and noticed a differance. And the sound is worth it alone. But im not sure how it will do in the 100 degree summers but i guess i will find out.

03 Grand Cherokee, 4inch Zone lift 15inch craiger soft 8's 31 inch duratracs nothing to special. SOLD

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post #8 of 21 Old 01-24-2012, 10:16 PM
McCloudsZJ
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I have a K&N with a heat shield on my 4.7. According to my Ultragauge reader, the inlet air temperature is usually about five degrees warmer than it was with the stock box. I don't think 5*F would make that much of a difference, and it does sound a lot cooler... Just my $0.02

March 2014 GCOTM. 1998 Deep Slate 5.9
On the Jeep:Hot intake, 52mm TB, Summit 8mm wires, catch can, 703s, insulated fuel rails, indexed Champions, Bilstein 4600s, Eibach lowering springs, Moog SS, Ironman mounts, Lotek 2GP, lots of gauges, sparkly paint.
In the garage: M1 4bbl
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post #9 of 21 Old 01-24-2012, 10:56 PM
mycreativename
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Quote:
Originally Posted by McCloudsWJ
I have a K&N with a heat shield on my 4.7. According to my Ultragauge reader, the inlet air temperature is usually about five degrees warmer than it was with the stock box. I don't think 5*F would make that much of a difference, and it does sound a lot cooler... Just my $0.02
So your new intake is warmer than the stock one or am I reading that wrong?

Also fun fact, whenever I read your name, I can just think "There can only be one" (Yes I know its spelled "MacLeod" in the Highlander series, still just makes me lol)

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That being said, it's like boinkin' your sister...just because you can, doesn't mean you should." - Double E
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post #10 of 21 Old 01-24-2012, 11:42 PM
McCloudsZJ
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Originally Posted by mycreativename View Post
So your new intake is warmer than the stock one or am I reading that wrong?

Also fun fact, whenever I read your name, I can just think "There can only be one" (Yes I know its MacLeod in the Highlander series, still just makes me lol)
Yes, you're reading it right. It's technically a FIPK (Fuel Injection Performance Kit or something like that). They're supposed to increase performance because they're "less restrictive" than the stock air box.

I don't know of any true cold air intakes out there for a WJ. A real cold air intake is supposed to pull cooler air from somewhere other than the engine bay.

An engine's potential to make power is a function of the temperature difference between the inlet and the combustion chamber (as well as a couple other things). If you can get cooler air in, or get the engine to burn hotter, there is a larger potential for power. Some math to prove it http://en.wikipedia.org/wiki/Otto_cycle

Bottom line up front, there may be power gains from the less restrictive air flow. There may be power lost to the smaller heat differential. You'll have people that will swear by both arguments. But, it sounds cool as hell.

Most CAI's are some variation of this--the air going into the engine is from outside of the engine bay and supposedly cooler:


A FIPK looks like this, with the inlet still inside of the engine bay:

March 2014 GCOTM. 1998 Deep Slate 5.9
On the Jeep:Hot intake, 52mm TB, Summit 8mm wires, catch can, 703s, insulated fuel rails, indexed Champions, Bilstein 4600s, Eibach lowering springs, Moog SS, Ironman mounts, Lotek 2GP, lots of gauges, sparkly paint.
In the garage: M1 4bbl
In the works: Addco/Hellwig sway bars, nitrous, full polly bushings, full exhaust, data logging, billet UD pulleys
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post #11 of 21 Old 01-25-2012, 12:11 AM
mycreativename
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Quote:
Originally Posted by McCloudsWJ
Bottom line up front, there may be power gains from the less restrictive air flow. There may be power lost to the smaller heat differential. You'll have people that will swear by both arguments. But, it sounds cool as hell.
Any chance of a video to show, or rather let us hear the difference in noise? I'm curious to what changes.

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That being said, it's like boinkin' your sister...just because you can, doesn't mean you should." - Double E
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post #12 of 21 Old 01-25-2012, 12:28 AM
thisguyhasadd2
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there is a loud suction and swoosh noise. as mccloud showed above if you could reroute where the air comes from that goes to filter it would be better. I like the FIPK to clear things up a bit and make it easier to do work. I got mine done for 15$ including filter. Really wouldn't want to spend the flow on the kits
peyton good stuff amigo. although i definitely did a triple take the first time i saw it!

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post #13 of 21 Old 01-25-2012, 11:42 AM
pinky2252s
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I'll just make my own... Haha. Maybe ill do a write up..

Is it broken?

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post #14 of 21 Old 01-25-2012, 01:38 PM
K10roc
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I made mine and powder coated it when i port and polished and powder coated my throttle body. works great!!! wiht as much that is open under the filter keeps cool air coming in, i noticed much better throttle response, sounds cool, and a bit better gas milage




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post #15 of 21 Old 01-25-2012, 01:52 PM
1AAdam
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Originally Posted by ezflip View Post
No such thing. You can get a k&n or make your own, but its going to be a warm air intake and wont do much if anything at all as far as performance.
thats pretty much what i have heard. it may help response just a little but the sound is the biggest difference.

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