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Homebrew Cold Air Intake

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Old Dec 23, 2008 | 09:40 PM
  #1  
BuckB91XJ's Avatar
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From: Oak Harbor, WA.
Year: 1987
Model: Cherokee
Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
Default Homebrew Cold Air Intake

As promised, here are pictures of my Homebrew cold air intake that I built for my 91 XJ Sport. I copied a design that my son originally came up with. The following things are needed to build your own:

1.) 3" PVC Pipe
2.) 3" Pipe Clamp
3.) 3/8" Hose Fitting x 2 (Brass was cheap and there so I went with that)
4.) 3" cone air filter of your preference.

Drill a couple of holes in the PCV pipe for the 2 hose fittings and screw them in. Hook your breather hoses to the fittings. I did some trimming inside the PCV pipe so the threaded part of the 2 fittings isn't in the intake air stream. You may need to pick up some new longer breather hoses so they reach. Use the 3" pipe clamp to clamp your OEM flex air intake hose to the 3" PCV pipe. You will also need to do a little trimming on the other end of the piece of PCV pipe so the cone filter will fit on. You need to thin it out just a bit. I used a Spectre 3" cone filter as I was going for cheap. You can obviously use AEM, K&N or whatever floats your boat. I also mounted a 5.5" long chunk of 2 by 4 right where the stock air box was. This keeps my Air Intake as high as possible without hitting the hood when I close it. So, with my set up you're still getting air from the stock location but, you get a hellovalot more of it. So far, I haven't had a single hydrolock issue.

Last edited by BuckB91XJ; Feb 7, 2009 at 12:15 AM.
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Old Dec 23, 2008 | 09:46 PM
  #2  
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Year: 1993
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nice
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Old Dec 23, 2008 | 10:26 PM
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Year: 1987
Model: Comanche
Engine: I6 4.0L
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Nice its just like mine just make a heat shield and you will feel even more power
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Old Dec 23, 2008 | 10:30 PM
  #4  
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From: Oak Harbor, WA.
Year: 1987
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Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
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It is a pretty simple and generic design but, somebody awhile back asked me to post pics.
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Old Dec 23, 2008 | 10:56 PM
  #5  
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really nice. i was actually thinking bout doing something similar. how much did you spend on it?
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Old Dec 23, 2008 | 10:58 PM
  #6  
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From: New Castle, Delaware
Year: 91
Model: Cherokee
Engine: 4.0
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I like it
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Old Dec 24, 2008 | 09:59 AM
  #7  
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Year: 1998
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Engine: 4.0
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Heat Shield for intake..has anyone made one and what from
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Old Dec 24, 2008 | 11:22 AM
  #8  
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Year: 1996
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Engine: strait 6, 4.0 HO
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xj?2010 has
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Old Dec 24, 2008 | 02:28 PM
  #9  
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From: Oak Harbor, WA.
Year: 1987
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Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
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My son and I made an intake for his 87 and my 91 at the same time. We bought all the pieces to build 2 from our local Home Depot for about $30 minus the cone filters. Those babies are $25 at Autozone even for the Spectre cheapies. The known names are obviously more.
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Old Dec 25, 2008 | 01:55 PM
  #10  
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From: Illinois
Year: 1998
Model: Cherokee
Engine: 4.0L I6
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Very nice. What kind of gains did you see?

And is there any way you can make those pictures larger?
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Old Dec 25, 2008 | 03:19 PM
  #11  
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Year: 1987
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Heres mine its basicly the same thing but with a heat shield

To make to make the shield i just went up to Home depot and got a peice of sheet metal then made a card board template and cut it and bent it till it fit nice then i bolted it in at the bottom an zip tied it at the top corners. then i painted it black and put electrical tape around the edges so i would'nt cut my arms on it



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Old Dec 25, 2008 | 03:46 PM
  #12  
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You can use hose instead of electrail tape.
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Old Dec 25, 2008 | 08:09 PM
  #13  
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nope it would'nt contour to the curves of it when i tried it
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Old Dec 25, 2008 | 08:33 PM
  #14  
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the hose like goin to the windshield washer.
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Old Dec 25, 2008 | 11:17 PM
  #15  
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Year: 1987
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Again it wont work bud
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