Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > Engine Performance/Intakes/Exhausts

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 09-12-2011, 09:29 PM
Member
 
Join Date: May 2011
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1332
wardy is on a distinguished road
Has anyone Modified Stock Exhaust System?

I would like to know if anyone has themselves modified the stock exhaust system? I have read dozens of posts from people who knew a bloke that did it and said it was great... but I have not heard first hand feedback from an owner who is living with a modified system.

I have my 5.7L v8 booked in next week for a mufflerectomoy. I was going to remove the center muffler, put a X piece in and leave the resonators in place.

That is one big muffler, so it must be doing a lot of work to keep the unit this quiet. I want a bit more sound without spending a fortune on a custom exhaust.

Has anyone tried this? What is the sound like? I do not want it to be obnoxiously loud. What is the drone like? is it un/bearable?

Any feedback? thanks in advance
__________________

__________________
Reply With Quote
  #2  
Old 09-18-2011, 08:47 AM
New Member
My Jeep: 2011 5.7L WK2
 
Join Date: Sep 2011
Location: bayou vista la
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
t-ray-foret is on a distinguished road
Re: Has anyone Modified Stock Exhaust System?

i did, took it to the guy that has done every car i have had in life, we put two 40 series flowmasters in the middle where the big muffler was, then at the back took out the back mufflers and put 12 inch glasspacks, finished off with 4 inch baffled stainless tips, with a h pipe connector, it sounds awesome, but being that its the wifes car she complains a little, i have also added bwoody intake and jet throttle body spacer, i dont find the exausht all that loud at 70 with the cruise set you barley notice it but when you mash the pedal people have to do a double take when they hear that 5.7 hemi growl
__________________

__________________
Reply With Quote
  #3  
Old 09-19-2011, 10:50 PM
Deception's Avatar
Imported From Detroit

My Jeep: 2011 3.6L WK2
 
Join Date: Sep 2011
Location: Michigan, USA
Posts: 439
Thanks: 19
Thanked 10 Times in 8 Posts
Rep Power: 6019
Deception has a reputation beyond reputeDeception has a reputation beyond reputeDeception has a reputation beyond reputeDeception has a reputation beyond reputeDeception has a reputation beyond reputeDeception has a reputation beyond reputeDeception has a reputation beyond reputeDeception has a reputation beyond reputeDeception has a reputation beyond reputeDeception has a reputation beyond reputeDeception has a reputation beyond repute
Re: Has anyone Modified Stock Exhaust System?

I want my Jeep to sound similar to the Infiniti FX exhausts, it's sleek and not too noticeable but growls when you want it to.
__________________
Reply With Quote
  #4  
Old 09-20-2011, 03:43 AM
Member
 
Join Date: May 2011
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1332
wardy is on a distinguished road
Re: Has anyone Modified Stock Exhaust System?

Thanks t-ray-foret, thats good feedback. From what i am gathering you cannot delete the center muffler without replacing it with something.

Did you do all those upgrades at once? Or one at a time to notice the difference? I would be intrested to know what effect the jet throttle spacer had on its own?
__________________
Reply With Quote
  #5  
Old 09-20-2011, 12:38 PM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Sep 2011
Location: OH
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1172
Clutch04 is on a distinguished road
Re: Has anyone Modified Stock Exhaust System?

Not exactly the route i would consider but if done right the cost/benefit is better than a high dollar catback system. Muffler swap is the best bet. Messing with the resonator would be more work and might result in unwanted drone or tone. The whole system is designed on noise canceling.
Ideally if you want it uncorked you replace the whole system.
__________________
11 GC Overland Summit- Hemi:thumbsup:
Mineral grey
08 MB C300 4matic
Previous: 04 Liberty 3.7, 04 Pontiac GTO
Reply With Quote
  #6  
Old 09-25-2011, 05:46 PM
Member
 
Join Date: May 2011
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1332
wardy is on a distinguished road
Re: Has anyone Modified Stock Exhaust System?

quick update... removed the center muffler, i didn't hear it but exhuast guy said is sound like SH$T. So put two small inline muffflers, not sure exactly what they are but only around 4 inches in diameter. The note down low is awesome. No resonance whatsoever. In fact at cruising speed sound is stock. At first noticed a drop in torque. It didn't pull up the hills as it used to. I also noticed full consumption dropped significantly... however after about 200 - 300km this seems to have returned to normal. I don't know if i have adjusted... but torque seems to be back to where it was, as is fuel consumption. Could it have been ECU adjusting?

With all that said, it's not perfect. There is a problem at WOT. Just as max power develops at around 5,000+ rpm and it changes gear, the exhaust lets out an almighty fart sound. It's a cross between a backfire and a loud turbo blowoff sound... weird????
__________________
Reply With Quote
  #7  
Old 09-28-2011, 12:21 PM
Member
 
Join Date: Aug 2011
Posts: 43
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1237
Ari gold is on a distinguished road
Re: Has anyone Modified Stock Exhaust System?

..................
__________________

__________________
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
A better exhaust system for the 5.7 WK?? jeepgcoman Grand Cherokee - WK 12 04-14-2011 09:04 PM
Anyone have the Corsa exhaust system yet? J13ntv Engine Performance/Intakes/Exhausts 6 02-16-2011 07:06 PM
BA Speakers in stock system jprieur Grand Cherokee - WK 9 06-27-2010 09:51 AM
Poll: What exhaust system you think is better all around?? SoCalMoparWK Performance Modifications 41 09-16-2009 04:58 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 12:41 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by Chrysler Group LLC.