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Unread 04-02-2008, 11:57 AM   #1
Unscathed
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Cowl Induction - snorkle (WRITE UP)

It's my first write-up, I will ad more pictures later.. as well as fix mistakes.

I started this project some time ago, looking at different write ups which made it a lot harder then it ended up because you had to source junkyard parts and crap. Since sourcing the parts was a pain, I made this so anyone that wanted to take a trip down to Autozone, could get everything they would need.

I have this installed and it works nice... I will add my mileage/horsepower benefits later.. as I just really did this to get clean cold air, instead of the warm dirty air it pulls from under the hood as well as a type of snorkel for deeper water driving & protection.. So far it
has provided better throttle response as well as some gas mileage increase.

DIY Stealth Snorkle/Cold Air intake:
Cost: $75



Novice install time from prep: 30-60 minutes

Requires the following:
Hole saw
Drill
Silicon
And the following products:


1- Cone Air Filter – Part No. 9192 – 19.99
http://www.autozone.com/images/produ...spe9132003.jpg

1- 90 degree elbow – Part No. 8698 - $9.99
http://www.autozone.com/images/produ...spe8698003.jpg

2- Air Intake ducts – Part No. 8148 - $5.99
http://www.autozone.com/images/products/spe/spe8148003.jpg

1- Air hose 3” x 3 feet – Part No. 8741 – $19.99
http://www.autozone.com/images/produ...spe8741003.jpg

2- Intake Tube Coupler’s – Part No. 8771-6 – $7.99
http://www.autozone.com/images/produ...spe8771003.jpghttp://www.autozone.com/images/produ...spe8771003.jpg

4- 2.5” to 3” hose clamps around $4 bucks
http://www.autozone.com/images/produ...yke28ss003.jpg


STEP ONE
Take the two Air intake ducts and attach them back to back using Silicone sealant so you have two ends away from each other to attach pipe to. Hold them together for a couple hours or a day to ensure a nice hold. Cut away any silicon that may appear in the center (http://www.autozone.com/images/produ...spe8148003.jpg)





STEP TWO

Take off the air induction cowl which is held on by 7 screws and two wipers.
4 of the screws are along the window sill – 1 is in the center of the vent on the hood.



2 more screws are actually where the hood meets the cowl. you have to lift the hood to get to them.



The wipers have this little lip on the backside, closest to the cowl that you just pull down a half inch to let you pull off the wiper arms.



STEP THREE
After you remove the cowl, you will see the cowl basin area, wiper motor, and AC/Heater shield duct. Depending on where you put the hole depends on if you will need to take out the AC/Heater shield.




I took mine out, but I don’t think I needed to after all was said and done.. but anyway. Take it out for now. measure up and cut a whole in the firewall/cowl area so that one end of the Air Intake ducts fits through.



Drill out the firewall for the four bolt holes that you will see in the air intake ducts you attached to each other. This will allow you to mount the intake to the firewall/cowl area. I would put a little silicon where the intake duct meets the firewall) and put the bolts through and tighten it up.


STEP FOUR
Take the 90 degree elbow http://www.autozone.com/images/produ...spe8698003.jpg
and one of the Intake Tube Coupler’s http://www.autozone.com/images/produ...spe8771003.jpg

Attach one end of the rubber coupler to the air intake duct that is inside the cowl area.

Attach the other end of the rubber coupler to the 90 degree elbow (which the opening should be facing the passenger side) and then attach the Air filter http://www.autozone.com/images/produ...spe9132003.jpg to the other end of the 90 degree elbow.



The inside is pretty much done. Depending on the clearance of the air filter, there is a small chance you may need to use a 5lb hand sledge to pound down some metal inside the cowl area. And before you close up the cowl area, turn on your wipers to make sure your motor arm will clear the 90 degree tube. Slight pipe adjustments will fix any clearance problems you will have.

Then bolt down the cowl and you are done with the first half of the project.

The second half will differ a little on how you do it…



LAST STEP
If you have the stock ABS pipe, you can cut it down as close as you can to the throttle body, keeping in mind that you will still need petcock so the vent line can still run from the valve cover.

At this point, all you need to do is take the 3” x 3 foot Air Pipe (http://www.autozone.com/images/produ...spe8741003.jpg) and run it from the intake coupler you just attached to the firewall, to the pipe headed to the throttle body.

I have this intake riser that I think can be found on 97-98 TJ's.. and the only reason I have it was because I bought it trying to do some other custom stuff, otherwise I would have just cut off the tube running to the stock box and piped right up to it.

If you want to see what the clearance looks like from the sides:




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Last edited by Unscathed; 04-04-2008 at 09:34 AM..
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Unread 04-02-2008, 12:05 PM   #2
MillerTimeTJ
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seems like a decent idea, hope you are still getting appropriate filtration but otherwise sounds awesome. PICTURES!!!
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Unread 04-02-2008, 12:09 PM   #3
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Yea, I the filter can be changed to whatever anyone wants.. if they have one preference over another. I just put this together to keep it simple.

Sounds awesome when you press the pedal



Top down view:



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Last edited by Unscathed; 04-04-2008 at 09:35 AM..
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Unread 04-02-2008, 12:13 PM   #4
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We need Pictures of it in the Jeep
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Unread 04-02-2008, 01:09 PM   #5
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Quote:
Originally Posted by Pillswoj View Post
We need Pictures of it in the Jeep
Pics please
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Unread 04-02-2008, 01:19 PM   #6
badoosh27
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sounds good dude. one side note is that if you take the a/c vent shield off and water gets in, it will flow directly onto the passenger floorboard. took me a while to figure that out, but that was my only issue. deff post pics too!!
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Unread 04-02-2008, 01:45 PM   #7
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Looking forward to the pictures. I intend to move my filter under the cowl at some point too, so I'd like to see how yours looks.
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Unread 04-02-2008, 01:58 PM   #8
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Today I start to do something like this. I have parts, but not yet hole in firewall. Waiting sample pictures
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Unread 04-02-2008, 02:03 PM   #9
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I promise, I will do it as soon as I get home tonight -

I have some ideas to make a shield before the ac vent intake, but I just need to get a welder and a piece of metal to make a small dam.

Other then that.. I am really impressed with it so far.
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Unread 04-02-2008, 07:12 PM   #10
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Pictures Are Up!!!!
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The owner of Alljeep.com, Wayne Hartwig will work within your budget!!! He is very informative to anyone not knowing much about axle work and will meet or beat any competitor's advertised price on any specific product delivered to your door - even if he sells at cost!
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Unread 04-02-2008, 07:22 PM   #11
1CleanTJ
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always love the cowl intakes

a little expensive the way you did it, but it works which is all that counts
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Unread 04-02-2008, 07:40 PM   #12
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yea.. well the hidden costs in my previous mistakes made it much more expensive then I listed..

I have learned from my mistakes.. lol.. but at least this gives someone a one stop shopping list if they want to do it
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Unread 04-02-2008, 07:52 PM   #13
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Quote:
Originally Posted by Unscathed View Post
yea.. well the hidden costs in my previous mistakes made it much more expensive then I listed..

I have learned from my mistakes.. lol.. but at least this gives someone a one stop shopping list if they want to do it
trial and error is the way to learn sometimes

what i meant is most people go with a honda civic short intake kit for $30 shipped (ebay) that includes cone filter, air intake tube with the bunge welded on a rubber adapter that fits the intake tube to the stock plastic TJ intake tube (cut down of course) and even a rubber hose to connect to the bunge to valve cover breather

i like yours though, its something custom and you get the proud feeling when you know you made it
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Unread 04-02-2008, 08:11 PM   #14
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1CleanTJ, I hear you.. Trial and error... lol.. been alot of that lately..

I made a mistake this post and edited it..

So in your case using the Honda civic kit... you would need:
$30 for the Honda civic kit which includes the filter and cut down your stock tube to mate up

$12 for the 2 - Air Intake ducts – Part No. 8148
(unless you want the tube running through your firewall rigid and bouncing around)

$10 for the 90 degree elbow

$16.00 for two Intake Tube Couplers (one to attach elbow to duct, one to attach to the honda tube to the intake duct)

So between $56 and 68 bucks doing it your way

Hey, I'm happy the way mine turned out
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Best Axles and service you will find. http://www.alljeep.com/oscommerce/in...p?cPath=32_617

The owner of Alljeep.com, Wayne Hartwig will work within your budget!!! He is very informative to anyone not knowing much about axle work and will meet or beat any competitor's advertised price on any specific product delivered to your door - even if he sells at cost!

Last edited by Unscathed; 04-02-2008 at 08:25 PM..
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Unread 04-02-2008, 09:23 PM   #15
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You didn't have to turn the filter under the cowl. It will fit straight in. Also, you can just buy some door trim moulding to go around the hole you cut. $2 compared to $12. Just saved you $36 right there...lol
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