Modified XJ Cherokee Tech XJ (84-01)
All modified tech questions. If it modifies your XJ beyond stock parts ask it here.
Sponsored by:
Sponsored by:

Snorkel to 2'' PVC to 3'' filter - Restriction?

Thread Tools
 
Search this Thread
 
Old 10-10-2014, 06:58 PM
  #1  
CF Veteran
Thread Starter
 
92XJGuy's Avatar
 
Join Date: Jun 2011
Location: Colorado
Posts: 2,448
Likes: 0
Received 0 Likes on 0 Posts
Year: 1992
Model: Cherokee
Engine: 4.0
Question Snorkel to 2'' PVC to 3'' filter - Restriction?

I'm modifying my snorkel to run into my engine bay through the fender, opposed to running inside the fender and coming up into the engine bay. All I did was cut another hole and trim my snorkel. I found that 2'' PVC fit perfectly inside the snorkel. I have the PVC going to a 2-3'' coupler that then goes to my 3'' filter, that then goes to the TB. Will this small 2'' piece that's less than 6'' in length restrict my air flow too much?
Old 10-10-2014, 07:33 PM
  #2  
CF Veteran
 
holycaveman's Avatar
 
Join Date: Dec 2011
Posts: 3,643
Likes: 0
Received 1 Like on 1 Post
Default

Not at all. You should see a wrangler air box opening!
Old 10-10-2014, 09:33 PM
  #3  
Member
 
Rjmils's Avatar
 
Join Date: May 2011
Location: West Virginia
Posts: 139
Likes: 0
Received 0 Likes on 0 Posts
Year: 1994
Model: Cherokee
Engine: 4.0
Default

The stock wrangler intake is horrible but for optimum flow the whole system should be no less than 2 1/2 id
Old 10-10-2014, 09:43 PM
  #4  
CF Veteran
 
holycaveman's Avatar
 
Join Date: Dec 2011
Posts: 3,643
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by Rjmils
The stock wrangler intake is horrible but for optimum flow the whole system should be no less than 2 1/2 id
Where did that figure come from?
Old 10-10-2014, 09:47 PM
  #5  
Member
 
Rjmils's Avatar
 
Join Date: May 2011
Location: West Virginia
Posts: 139
Likes: 0
Received 0 Likes on 0 Posts
Year: 1994
Model: Cherokee
Engine: 4.0
Default

There's an intake thread on here some where. It came from this site I'll try to find it but I remember that for sure. Any less was a bit restricting
Old 10-11-2014, 12:04 AM
  #6  
CF Veteran
Thread Starter
 
92XJGuy's Avatar
 
Join Date: Jun 2011
Location: Colorado
Posts: 2,448
Likes: 0
Received 0 Likes on 0 Posts
Year: 1992
Model: Cherokee
Engine: 4.0
Default

Originally Posted by Rjmils
The stock wrangler intake is horrible but for optimum flow the whole system should be no less than 2 1/2 id
Well the 2'' piece is just 6'' long. Is it that big of a deal? I have the snorkel opening, then it goes from the 2'' or so hole into the 2'' PVC then into an adapter where it goes to a 3'' filter, then into the TB. I know it's not great, but it should be fine, right? I just was pretty limited with things to do since I didn't want a hose running inside my fender since I've had nothing but issues with that.
Old 10-11-2014, 12:30 AM
  #7  
CF Veteran
 
holycaveman's Avatar
 
Join Date: Dec 2011
Posts: 3,643
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by 92XJGuy
Well the 2'' piece is just 6'' long. Is it that big of a deal? I have the snorkel opening, then it goes from the 2'' or so hole into the 2'' PVC then into an adapter where it goes to a 3'' filter, then into the TB. I know it's not great, but it should be fine, right? I just was pretty limited with things to do since I didn't want a hose running inside my fender since I've had nothing but issues with that.
I really don't see a problem.
Old 10-11-2014, 06:06 AM
  #8  
Member
 
Rjmils's Avatar
 
Join Date: May 2011
Location: West Virginia
Posts: 139
Likes: 0
Received 0 Likes on 0 Posts
Year: 1994
Model: Cherokee
Engine: 4.0
Default

Oh yea it'll be fine I'm just talking about optimum performance
Old 10-15-2014, 07:09 PM
  #9  
CF Veteran
Thread Starter
 
92XJGuy's Avatar
 
Join Date: Jun 2011
Location: Colorado
Posts: 2,448
Likes: 0
Received 0 Likes on 0 Posts
Year: 1992
Model: Cherokee
Engine: 4.0
Default

So it's installed and seems fine.. but when I accelerate/floor it, it sounds like the snorkel is making a throaty exhaust noise. Like when I first noticed it, I thought it was the truck next to me with a nice exhaust. Then heard it later on and realized it was coming from my snorkel. Normal? Too restricted? Thoughts? I don't mind the noise, I just don't want to be causing damage.
Old 10-15-2014, 09:46 PM
  #10  
Seasoned Member
 
CrawdadSlim's Avatar
 
Join Date: May 2013
Location: Sucka Free East Bay Cali
Posts: 448
Likes: 0
Received 0 Likes on 0 Posts
Year: 2000
Model: Cherokee
Engine: 4.0
Default

It won't harm anything but performance. With an intake like that I wouldn't worry about freeing up the exaust.
Old 10-16-2014, 09:36 PM
  #11  
CF Veteran
Thread Starter
 
92XJGuy's Avatar
 
Join Date: Jun 2011
Location: Colorado
Posts: 2,448
Likes: 0
Received 0 Likes on 0 Posts
Year: 1992
Model: Cherokee
Engine: 4.0
Default

How much performance of a hit would it do? I kind of notice a difference in acceleration. Is that 2'' that big of a restriction? Should I even consider widening up the hole and getting new parts and going to 3''?


Here's the setup:
Snorkel goes to a 2'' PVC that is less than 6'' long through the fender, into a 2-3'' rubber adapter that goes straight to the 3'' air filter, which then goes to I'm assuming the stock hose to the TB.

Snorkel to 2'' PVC to 3'' filter - Restriction?-t0mj8lq.jpg

Last edited by 92XJGuy; 10-16-2014 at 09:39 PM.
Old 10-17-2014, 01:03 AM
  #12  
Seasoned Member
 
CrawdadSlim's Avatar
 
Join Date: May 2013
Location: Sucka Free East Bay Cali
Posts: 448
Likes: 0
Received 0 Likes on 0 Posts
Year: 2000
Model: Cherokee
Engine: 4.0
Default

The snork itself is a restriction. By reducing it even more compounds the performance loss. Imagin breathing through a straw and someone pinches it. I'd get rid of the reducer.
Old 10-17-2014, 08:06 AM
  #13  
Seasoned Member
 
kcdt58's Avatar
 
Join Date: Jun 2013
Location: Hickory, NC
Posts: 417
Likes: 0
Received 1 Like on 1 Post
Year: 2000
Model: Cherokee(XJ)
Engine: 4.0 L
Default

If it was me I would trim the hole larger and swap over to a 3" pipe. Simple and quick, and I think you'd be surprised on the performance gain compared to what you have right now.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Austindude2015
Cherokee Chat
17
12-28-2020 05:12 PM
Sethers775
Modified XJ Cherokee Tech
45
09-25-2017 08:35 PM
Blackxj51
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
17
11-26-2015 12:04 AM
Bearstream
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
2
09-28-2015 10:53 AM
jeepnewbie44312
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
24
09-28-2015 06:04 AM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


Quick Reply: Snorkel to 2'' PVC to 3'' filter - Restriction?



All times are GMT -5. The time now is 09:22 PM.