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:

Why doesn't my 4.0 sound good

Thread Tools
 
Search this Thread
 
Old Jun 4, 2014 | 03:55 PM
  #1  
toddreg's Avatar
Thread Starter
Junior Member
 
Joined: Jan 2009
Posts: 92
Likes: 4
From: NW GA
Year: 1997
Model: Cherokee
Engine: 4.0
Default Why doesn't my 4.0 sound good

My recently acquired XJ has Dorman headers, high flow cat and a Magnaflow 11256 with 2.5" pipe. It does not sound deep or throaty like some of the sound clips I have viewed on this forum. What's up with that? How can I make this thing sound half way decent?

(deleted comment about cat)

Last edited by toddreg; Jun 4, 2014 at 04:28 PM.
Reply
Old Jun 4, 2014 | 04:03 PM
  #2  
Atmos's Avatar
CF Veteran
 
Joined: Nov 2011
Posts: 7,387
Likes: 10
From: City of Trees, CA
Year: 93 2 door
Model: Cherokee
Engine: 4.0
Default

removal of the cat is illegal in all states and discussion of cat removal is not permitted on forums

that being said, if it's not chopped right after the muffler I would start there. chop after muffler, weld on turndown tip
if it already is chopped, that's probably as good as it's going to get. please stand by and wait for some of the actual exhaust pros on this forum to step in and help ya
Reply
Old Jun 4, 2014 | 04:06 PM
  #3  
SteveMongr's Avatar
Beach Bum
 
Joined: Jul 2011
Posts: 6,123
Likes: 22
From: Cape Hatteras, North Carolina
Year: 2000 WJ
Model: Grand Cherokee
Engine: 4.0
Default Cat.

^That is a question that cannot be mentioned or discussed here because it goes against federal law. Editing it out would be a good idea, otherwise a moderator may do it for you (not good).
I think the muffler itself makes the most difference in sound, if you would like a rumble then try a "cherry bomb' type. They are cheap.
Reply
Old Jun 4, 2014 | 05:14 PM
  #4  
MonacaYankee's Avatar
CF Veteran
15 Year Member
 
Joined: Mar 2010
Posts: 1,441
Likes: 9
From: Georgia
Year: 99 94
Model: Cherokee (XJ)
Engine: I6
Default

My super 44 has a pretty deep blub blub blub at idle but goes away at any Rpm higher. Take the muffler off .
Reply
Old Jun 4, 2014 | 06:17 PM
  #5  
JD Cravin's Avatar
Senior Member
 
Joined: Nov 2010
Posts: 922
Likes: 0
From: Vegas Baby!
Model: Cherokee
Default

is that Dorman header a long tube design...or is it the same length as the stock manifold?


My Pacesetter long tube header with a spun, hi-flow cat and super 44 sounds hella good...and deep, manly even.
Reply
Old Jun 4, 2014 | 09:04 PM
  #6  
dirtyjerz's Avatar
Member
 
Joined: Apr 2013
Posts: 152
Likes: 0
Year: 1996
Model: Cherokee
Engine: 4.0
Default

My super 44 has a pretty deep blub blub blub at idle but goes away at any Rpm higher. Take the muffler off .
x2 with no carpet sometimes its annoying sometimes
Reply
Old Jun 5, 2014 | 12:50 AM
  #7  
andrewmp6's Avatar
CF Veteran
 
Joined: Jun 2011
Posts: 8,014
Likes: 17
From: Louisville,KY
Model: Cherokee
Default

Unhook the muffler and start it up see if it sounds good to you.
Reply
Old Jun 5, 2014 | 06:21 AM
  #8  
Kingfisher's Avatar
Senior Member
 
Joined: Mar 2014
Posts: 552
Likes: 1
From: Central Indiana
Year: 1996
Model: Cherokee
Engine: 4.0
Default

I have the round red Thrush, and I like it.
About $30 I think.........
Reply
Old Jun 5, 2014 | 06:38 AM
  #9  
Lowrange2's Avatar
Junior Member
 
Joined: May 2008
Posts: 15,016
Likes: 11
From: +34° 25' 35.67", -81° 21' 12.04"
Year: 1993
Engine: 4.0
Default

IMO, a stock cat and a stock muffler would make it sound spectacular.
Reply
Old Jun 5, 2014 | 08:34 AM
  #10  
XJlimitedx99's Avatar
CF Veteran
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2012
Posts: 3,132
Likes: 357
From: Andover, VT
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0 L
Default

So you have an intake or any other mods? That 2.5" pipe is probably slowing down your exhaust velocity. It might sound better if you get more air in the front. A CAI or bored throttle body may help with the deepness of it.
Reply
Old Jun 5, 2014 | 08:57 AM
  #11  
toddreg's Avatar
Thread Starter
Junior Member
 
Joined: Jan 2009
Posts: 92
Likes: 4
From: NW GA
Year: 1997
Model: Cherokee
Engine: 4.0
Default I have both

I have a K&N and a spacer

Originally Posted by XJlimitedx99
So you have an intake or any other mods? That 2.5" pipe is probably slowing down your exhaust velocity. It might sound better if you get more air in the front. A CAI or bored throttle body may help with the deepness of it.
Reply
Old Jun 5, 2014 | 01:06 PM
  #12  
XJlimitedx99's Avatar
CF Veteran
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2012
Posts: 3,132
Likes: 357
From: Andover, VT
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0 L
Default

It could just be you aren't really a fan of the sound of your muffler. I've always preferred the sound of a flow master over a magnaflow. IMO the magnaflow almost sounds ricey, although I've never heard one with headers and a high flow cat.
Reply
Old Jun 5, 2014 | 09:23 PM
  #13  
96xjcheapjeep's Avatar
Junior Member
 
Joined: Feb 2014
Posts: 85
Likes: 0
Model: Cherokee
Default

I have all stock parts on except for the thrush muffler I threw on to make it a lil louder there bout 3 inches of pipe between the cat and muffler and nothing after the muffler and it sounds good to me
Reply
Old Jun 5, 2014 | 10:04 PM
  #14  
Tom95YJ's Avatar
CF Veteran
 
Joined: Nov 2011
Posts: 3,603
Likes: 3
From: SLC, Utah
Year: 1999
Model: Cherokee
Engine: 4.0L
Default

Originally Posted by XJlimitedx99
It could just be you aren't really a fan of the sound of your muffler. I've always preferred the sound of a flow master over a magnaflow. IMO the magnaflow almost sounds ricey, although I've never heard one with headers and a high flow cat.
Goto the exhaust sound clip sticky thread mine is the first video
Reply
Old Jun 6, 2014 | 10:55 PM
  #15  
XJlimitedx99's Avatar
CF Veteran
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2012
Posts: 3,132
Likes: 357
From: Andover, VT
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0 L
Default

Originally Posted by Tom95YJ
Goto the exhaust sound clip sticky thread mine is the first video
Yeah that's sounds like a magnaflow if I've ever heard one. Magnaflow has great products, but the design of them makes them sound the way they do. If you want the "deepness" then I'd try another brand muffler like a flowmaster 40. I'm sure there's a ton of other options but I don't really have experience with anything other than flowmasters and cherrybombs.
Reply



All times are GMT -5. The time now is 10:09 AM.