$4 "cold" air intake modification

streetKJ · **Posted:** Sun Oct 15, 2006 1:23 am

***UPDATE***

It rained a bit in my area for a few days in the past few weeks. When I drive in the rain, the grooves in the gutter pipe catch all the incoming water, which isnt very much at all. I touched the cone filter after driving, and its dry as a whistle.

And I just got back to SF from Portland, OR over the weekend. Drove through a snowstorm and heavy rain on Interstate 5. The open piping held its own and no water got in the intake.

But I'll have to clean and re-oil it.

DarbyWalters · **Posted:** Mon Apr 30, 2007 11:38 pm

I would bet that the new Snorkel that has a group buy would work great...Colder Air+Ram Effect+Cleaner Air=Power and Less Wear

SavageUrge · **Posted:** Sat May 05, 2007 12:08 pm

I finally got around to spending the $1.99 for one of these (at Lowes) and stuck it in there just as the pictures show (not that there is much choice in how you stick it in there) and can I just say HOLY $H*T! It's like I put a supercharger under there. I can't explain how this makes so much of a difference. Not only am I getting great gas mileage, I'm experiencing some serious throttle response! It runs all the time like it does when it's cold. There is no more lag when I hit the throttle and no ramp-up/turbo-lag feeling - just instant kick-you-in-the-a$$ acceleration! You can't beat the benefit for $1.99! I don't know if it makes a difference, but the K&N intake kit surrounds the whole filter and seals against the hood when it closes, making a sort of cold air "trap" where the filter is. I imagine this gutter tube would cause a positive pressure when moving forward, therefore pushing hot air away from the filter and sucking all the colder air from the tube. This is my attempt at a "scientific" hypothesis, LOL. At any rate, unless you don't care for better mileage and great throttle response - DO THIS!

KeswickDave · **Posted:** Wed Nov 14, 2007 5:57 pm

I have been contemplating something for a while, making a modification to the stock airbox.

I think someone else has done something similar to the stock box, I can't remember who, but mine comes with a twist...

Taking a similar route, I'm thinking about using a 2 1/2" "Shop Vac" or similar hose cut to length, terminating it to a "Shop Vac" style blast gate installed on the side of the airbox.

This would allow the air flow from the "cold air" hose to be shut off if you are worried about inclement weather or fording.

I will admit I haven't taken a really close look and thought this through entirely, but it seems to me it could work!

Best I could find for a pic of a blast gate...

Any thoughts?

riptricket · **Posted:** Wed Nov 14, 2007 7:21 pm

sounds like a great idea!!!

SavageUrge · **Posted:** Sun Dec 09, 2007 1:26 pm

As far as your "blast gate" idea...You could go to an RV store and buy a gate valve. Essentially the same idea, but much higher in quality and also waterproof! Get yourself an old choke cable or the like and rig it up through the firewall to your dashboard so you could operate the gate valve from inside. This way ya don't have to screw around with getting out and opening the hood.

KeswickDave · **Posted:** Mon Dec 10, 2007 3:26 pm

SavageUrge,

Good thoughts! Now we're talking, love the cable idea.

I may have a go at this down the road, but probably not until spring/summer due to lack of a garage and my allergy to below-freezing temperatures ;-)

Keep the ideas coming though and if anyone goes for it be sure to post pics!

Dave

MonsieurGlen · **Posted:** Mon Dec 17, 2007 3:02 am

I'm working on an intake mod using ABS pipe elbows instead of the flexible downspout.
I have already fitted it together, and it doesn't look like an add on. I have fitted the end that goes into my airbox with a threaded plug so that I can seal it while off-roading or it is too wet out. Now I need to determine the best way to permanently attach and seal it.

I'll post pictures, a parts list and a how-to in the fabrication section when I get the time to install it.

MonsieurGlen · **Posted:** Thu Dec 27, 2007 3:56 am

MonsieurGlen wrote:

I'm working on an intake mod using ABS pipe elbows instead of the flexible downspout.
I have already fitted it together, and it doesn't look like an add on. I have fitted the end that goes into my airbox with a threaded plug so that I can seal it while off-roading or it is too wet out. Now I need to determine the best way to permanently attach and seal it.

I'll post pictures, a parts list and a how-to in the fabrication section when I get the time to install it.

I finished my install on christmas eve. The parts that I used are all 2" ABS street elbows as follows:

1 - 90 degree elbow
3 - 45 degree elbows
3 - 22.5 degree elbows
1 - female threaded coupling
1 - threaded plug
ABS cement
Black RTV silicone

I first removed the grill and the airbox. After determining the best fit I assembled the 90, 45's and a 22.5 elbows to form an "s" to come out of the side of the air box and go around the radiator support post. It should look like this when assembled:

Using a 2 1/2" hole saw, cut a hole in the side of the airbox:

Also cut a hole in the rubber behind the grill just below the headlight for the pipe to go through. The second 22.5 elbow goes through here into the "s" pipe. Make sure to aim it forward like this:

Reinstall the airbox and fit the pipe into it so that the last 22.5 elbow can fit on it to direct the air up toward the filter. Then install the female coupling to be able to cap it off in wet conditions.:

Once it is all installed, make sure to seal around the new intake and the box with the silicone to keep any unwanted water out. Reinstall the grill and it should look like this when it is finished:

I really like this set up because it is hardly noticable and almost looks factory under the hood.

SavageUrge · **Posted:** Fri Dec 28, 2007 1:11 am

Looks good! Nice job

Rush345 · **Posted:** Fri Dec 28, 2007 2:57 am

MonsieurGlen wrote:

I'm working on an intake mod using ABS pipe elbows instead of the flexible downspout.
I have already fitted it together, and it doesn't look like an add on. I have fitted the end that goes into my airbox with a threaded plug so that I can seal it while off-roading or it is too wet out. Now I need to determine the best way to permanently attach and seal it.

I'll post pictures, a parts list and a how-to in the fabrication section when I get the time to install it.

I finished my install on christmas eve. The parts that I used are all 2" ABS street elbows as follows:

1 - 90 degree elbow
3 - 45 degree elbows
3 - 22.5 degree elbows
1 - female threaded coupling
1 - threaded plug
ABS cement
Black RTV silicone

I first removed the grill and the airbox. After determining the best fit I assembled the 90, 45's and a 22.5 elbows to form an "s" to come out of the side of the air box and go around the radiator support post. It should look like this when assembled:

Using a 2 1/2" hole saw, cut a hole in the side of the airbox:

Also cut a hole in the rubber behind the grill just below the headlight for the pipe to go through. The second 22.5 elbow goes through here into the "s" pipe. Make sure to aim it forward like this:

Reinstall the airbox and fit the pipe into it so that the last 22.5 elbow can fit on it to direct the air up toward the filter. Then install the female coupling to be able to cap it off in wet conditions.:

Once it is all installed, make sure to seal around the new intake and the box with the silicone to keep any unwanted water out. Reinstall the grill and it should look like this when it is finished:

I really like this set up because it is hardly noticable and almost looks factory under the hood.

Have you noticed the kick in pants responce described by others?? I just last week finished pulling the slat insert behind the grill face and painted them with Dupli-Color Anodized Red and Anodized Blue I also painted the Fluid caps different Red and Blue then pulled the both Air boxes the Factory Filter lid and tne throttle bodie box painted them Anodizede Blue and the lettering JEEP and V-6 3.7L with Red looks rather sharp now I have to tear it all apart and play cut and paste with your air box design I'll be posting pictures as soon as I get some Decals I've ordered from PIX and when finished then I'll post my paint jobs.

MonsieurGlen · **Posted:** Mon Jan 07, 2008 9:58 pm

I was out of town for the New Year so I didn't drive much after Christmas. But I finally got to drive enough today to see a difference in the power, and yes, I could feel the "kick in the pants" that the others have mentioned. It seems to run at slightly lower RPM's than before but I could be mistaken. Did anybody else notice that? Now I just need to drive through a full tank of gas to see if it makes a difference in the MPG's.

Rush345 · **Posted:** Tue Jan 08, 2008 11:12 pm

I stopped at Lowes and looked at your list of parts but also considered a sleeve type ring with a screen pulled over the grill opening peice to keep bugs out of the box. Of coarse you posted after I had my grill reasembled having taken it off to paint the grill inserts with Dupli-Color anodized RED and BLUE. Now I'll have to tear it apart all over again. :twisted:

Rush345 · **Posted:** Sat Jan 19, 2008 11:33 pm

MonsieurGlen wrote:

I was out of town for the New Year so I didn't drive much after Christmas. But I finally got to drive enough today to see a difference in the power, and yes, I could feel the "kick in the pants" that the others have mentioned. It seems to run at slightly lower RPM's than before but I could be mistaken. Did anybody else notice that? Now I just need to drive through a full tank of gas to see if it makes a difference in the MPG's.

Upon looking at my engine bay today it looks rather tight as to installation into the front grill area, any additional tips as to installation??
I have a Dremel type tool to cut and trim the installation types. As I look at it more and more I wonder if a Shop Vac's enlongated nozzel might work as well and give more area induction area. All help and advise would be appreciated.
Thank-You
David

MonsieurGlen · **Posted:** Mon Jan 21, 2008 3:32 am

Rush345 wrote:

MonsieurGlen wrote:

I was out of town for the New Year so I didn't drive much after Christmas. But I finally got to drive enough today to see a difference in the power, and yes, I could feel the "kick in the pants" that the others have mentioned. It seems to run at slightly lower RPM's than before but I could be mistaken. Did anybody else notice that? Now I just need to drive through a full tank of gas to see if it makes a difference in the MPG's.

Upon looking at my engine bay today it looks rather tight as to installation into the front grill area, any additional tips as to installation??
I have a Dremel type tool to cut and trim the installation types. As I look at it more and more I wonder if a Shop Vac's enlongated nozzel might work as well and give more area induction area. All help and advise would be appreciated.
Thank-You
David

It is a rather tight fit around the radiator support. I would suggest fitting the 90 into the box first then assembling the rest except for the piece that fits through the rubber by the radiator (put that on last, from the front). Once the pieces are all together, glue them to the 90 then glue the last piece on.

Rush345 · **Posted:** Mon Jan 21, 2008 11:20 pm

But hopefully I will figure out a MOD that will perform all functions.

Kugellager · **Posted:** Thu Sep 11, 2008 10:38 pm

Check out page 3 of my mods thread to see my version of the cold air intake (It's more like pseudo ram-air). Cost is around $6 in materials and a few hours of cutting, pounding and fitting. I am in the process of testing the gas mileage to see if there is any significant difference. I averaged 14.5-15.5mpg before the intake. We'll see what happens (if anything) after a few tanks of gas.

http://www.lostjeeps.com/forum/phpBB3/vie ... 542#375542

John
];')

richar43 · **Posted:** Sun Jul 18, 2010 2:39 pm

I'm interested in trying this out on my 07 liberty, and was wondering how the results are from this, also concerning water getting in, it looks easy enough as well. I may have to give this a try later this week....

tommudd · **Posted:** Sun Jul 18, 2010 3:56 pm

Wow digging them up from the past aren't ya! :ROTFL:

I have been running a 3 inch dryer hose set up to the grill for 50,000 or so miles, in combination with the Amsoil air filter in the stock box its been the best setup I have had on it so far.
Tried CAI with K&N and others and this gets the best mileage all around and better performance, had it through rain, hail, snow and creeks and its still going with no problems

richar43 · **Posted:** Sun Jul 18, 2010 4:19 pm

, honestly I didn't even notice the date.... man I guess I did drag it up from the past.....thanks for the input, it is good to know, also one question, do you still use the factory air inlet, or do you block it off, just wanting to clarify if i need to leave it or just close it off. thanks again

$4 "cold" air intake modification

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