Stock CAI.. sort of?
05-07-2008 | 07:59 AM
#12
JK Enthusiast
Joined: Feb 2008
Posts: 456
Likes: 0
From: West Michigan
I'm NOT an expert but I have a hard time believing the crinkle tube is causing SO much turbulence that you would gain any sort of performance by replacing it. How's that saying go...something about if there where cheap and simple changes that would improve performance it would already have it from the factory...
One other thing to consider, I have read and also observed engine movement or twist in cars. Some (most?) motors will have room to "twist" under a sudden hard acceleration (not sure if the JK does?) so consider this when hard mounting something between the engine and the frame/body. The crinkle tube may be there for this very reason.
One other thing to consider, I have read and also observed engine movement or twist in cars. Some (most?) motors will have room to "twist" under a sudden hard acceleration (not sure if the JK does?) so consider this when hard mounting something between the engine and the frame/body. The crinkle tube may be there for this very reason.
05-07-2008 | 09:21 AM
#13
JK Enthusiast
Joined: Feb 2008
Posts: 307
Likes: 0
From: Seattle, WA
I did exactly what you're talking about last year.
It's actually easier than you think.
All you have to do is cut off the first 3"s or so of the stock tubing.
Throw away the initial section but keep the elbow part of it.
Then insert a piece of 3" exhaust tubing into the elbow and connect it to the airbox.
If you take the stock one off and look at it....it starts at 3" Then hits a wall (like a huge step) where it narrows down to about 2.5" or less. Right before the elbow it enlarges back to 3".
So like I said above, I cut out the 2.5" section and installed a 3" section of tubing.
It's actually easier than you think.
All you have to do is cut off the first 3"s or so of the stock tubing.
Throw away the initial section but keep the elbow part of it.
Then insert a piece of 3" exhaust tubing into the elbow and connect it to the airbox.
If you take the stock one off and look at it....it starts at 3" Then hits a wall (like a huge step) where it narrows down to about 2.5" or less. Right before the elbow it enlarges back to 3".
So like I said above, I cut out the 2.5" section and installed a 3" section of tubing.
05-07-2008 | 06:13 PM
#14
JK Enthusiast
Joined: May 2007
Posts: 421
Likes: 4
From: Indianapolis, IN
Your wish is my command
Here's the big step
As far as gains, I added the K&N at the same time.
I actually posted my results last year. Don't quote me but I think it was an average of about 1.2 mpg with my 35's.
***Edit*** I also did some opening up of the airbox. I got a 2nd airbox and intake tube for free so I was experimenting with the extra set.
Here's the big step
As far as gains, I added the K&N at the same time.
I actually posted my results last year. Don't quote me but I think it was an average of about 1.2 mpg with my 35's.
***Edit*** I also did some opening up of the airbox. I got a 2nd airbox and intake tube for free so I was experimenting with the extra set.