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
 
  #37  
Old 10-05-2012, 02:17 PM
Member
My Jeep: 2011 3.6L WK2
 
Join Date: Jul 2012
Location: Prescott Arizona
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 846
kharrar has a reputation beyond reputekharrar has a reputation beyond repute
Re: Dynomax cat back system

I intalled it on a 3.6 and it is terrible; loud, drone, resonance issues. Thank God they have a really good return policy.

Will go with a Corsa?
__________________

__________________
Reply With Quote
  #38  
Old 10-05-2012, 02:43 PM
Member
 
Join Date: Jan 2012
Posts: 142
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 163476
bit50 has a reputation beyond reputebit50 has a reputation beyond reputebit50 has a reputation beyond reputebit50 has a reputation beyond reputebit50 has a reputation beyond reputebit50 has a reputation beyond reputebit50 has a reputation beyond reputebit50 has a reputation beyond reputebit50 has a reputation beyond reputebit50 has a reputation beyond reputebit50 has a reputation beyond repute
Re: Dynomax cat back system

Installed this last weekend. Love it and kind of don't like it at the same time. There is drone if you leave it in D. This happens when the torque converter is locked up. The second it unlocks it seems to go away. I drive in tow mode so it's fine. Aggressive sounding and sounds great at open throttle.

I'm going to make a video hopefully this weekend.
__________________

__________________
2012 Laredo X 4X4, 5.7 Hemi, luxury package.
Mods: 2.5" RR lift,RR SuperSliders, ProComp 7036 wheels, 275/65-18 Wrangler Duratracs
My WK2 offroad:http://www.youtube.com/watch?v=AueMX...2&feature=plcp
Reply With Quote
  #39  
Old 10-05-2012, 02:46 PM
five.7 Hemi's Avatar
Member
My Jeep: 2012 5.7L WK2
 
Join Date: May 2012
Location: Spring, TX
Posts: 504
Thanks: 1
Thanked 5 Times in 5 Posts
Rep Power: 1380
five.7 Hemi is on a distinguished road
Garage
Re: Dynomax cat back system

Quote:
Originally Posted by kharrar View Post
I intalled it on a 3.6 and it is terrible; loud, drone, resonance issues. Thank God they have a really good return policy.

Will go with a Corsa?

Sorry to hear that but I kind of expected it. I have it on my Hemi along with an aFe stage 2 intake. At full throttle it sounds incredible! I’ve just adapted my driving style to lessen the drone but I tell you what, it sounds so good @ WOT that my fuel mileage has suffered but my ears are in heaven.
__________________
[SIGPIC][/SIGPIC]
:boobies: <-- oh yeah! :D
Reply With Quote
  #40  
Old 10-05-2012, 03:22 PM
Member
My Jeep: 2011 3.6L WK2
 
Join Date: Jul 2012
Location: Prescott Arizona
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 846
kharrar has a reputation beyond reputekharrar has a reputation beyond repute
Re: Dynomax cat back system

Would love to buy someones stock V8 system? The Dynomax is going back.....

I would even take a factory system cut for easy shipping??

Thanks Karl in AZ
__________________
Reply With Quote
  #41  
Old 10-05-2012, 11:16 PM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Dec 2009
Location: Milwaukee, WI
Posts: 54
Thanks: 0
Thanked 2 Times in 1 Post
Rep Power: 1786
binford6100 is on a distinguished road
Re: Dynomax cat back system

I'm on my second week with the Dynomax and like others, I have adjusted my driving style to minimize the drone. Despite this effort, I'm seriously considering either the Borla (assuming this system doesn't suffer from the same level of drone) or putting the stock exhaust back on since I had the foresight to hang onto it without cutting it up.

Anyone heard both the dynomax and Borla systems and care to comment on a drone comparison?
__________________
Reply With Quote
  #42  
Old 10-06-2012, 07:05 AM
five.7 Hemi's Avatar
Member
My Jeep: 2012 5.7L WK2
 
Join Date: May 2012
Location: Spring, TX
Posts: 504
Thanks: 1
Thanked 5 Times in 5 Posts
Rep Power: 1380
five.7 Hemi is on a distinguished road
Garage
Re: Dynomax cat back system

I too have kept my stock exhaust but only for when I plan to sell the jeep.
I am going to look into cutting off the Dynomax X-pipe and replace it with a Dynomax X-flow muffler....don't know if it will make much difference but its worth a shot. Don't know when I'll get around to doing it cause I'm pretty busy working on my motorcycle right now and I'm not in any hurry to do it. I'll be sure to post up my results when I do it though.
__________________
[SIGPIC][/SIGPIC]
:boobies: <-- oh yeah! :D
Reply With Quote
  #43  
Old 10-06-2012, 08:32 AM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Dec 2009
Location: Milwaukee, WI
Posts: 54
Thanks: 0
Thanked 2 Times in 1 Post
Rep Power: 1786
binford6100 is on a distinguished road
Re: Dynomax cat back system

Quote:
Originally Posted by five.7 Hemi View Post
I too have kept my stock exhaust but only for when I plan to sell the jeep.
I am going to look into cutting off the Dynomax X-pipe and replace it with a Dynomax X-flow muffler....don't know if it will make much difference but its worth a shot. Don't know when I'll get around to doing it cause I'm pretty busy working on my motorcycle right now and I'm not in any hurry to do it. I'll be sure to post up my results when I do it though.
I had exactly the same thought! I looked at the dynomax web site and wondered if swapping that x-pipe would help. I hate to simply scap the dynomax altogether, but I don't think I can just live with that obnoxious drone that seems to be so prevalent at ~1400RPM when the transmission has not shifted out of O/D going up a steep grade. It makes the whole vehicle rattle!
__________________
Reply With Quote
  #44  
Old 10-06-2012, 09:34 AM
five.7 Hemi's Avatar
Member
My Jeep: 2012 5.7L WK2
 
Join Date: May 2012
Location: Spring, TX
Posts: 504
Thanks: 1
Thanked 5 Times in 5 Posts
Rep Power: 1380
five.7 Hemi is on a distinguished road
Garage
Re: Dynomax cat back system

Quote:
Originally Posted by binford6100 View Post
I had exactly the same thought! I looked at the dynomax web site and wondered if swapping that x-pipe would help. I hate to simply scap the dynomax altogether, but I don't think I can just live with that obnoxious drone that seems to be so prevalent at ~1400RPM when the transmission has not shifted out of O/D going up a steep grade. It makes the whole vehicle rattle!
I know exactly what u mean......that's why I step on it and make it down shift.....that's why my MPG has dropped.
__________________
[SIGPIC][/SIGPIC]
:boobies: <-- oh yeah! :D
Reply With Quote
  #45  
Old 10-07-2012, 06:29 PM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Dec 2009
Location: Milwaukee, WI
Posts: 54
Thanks: 0
Thanked 2 Times in 1 Post
Rep Power: 1786
binford6100 is on a distinguished road
Re: Dynomax cat back system

I'd be very interested in hearing whether or not swapping the x-pipe improves things at all or not. If it doesn't, I'll be ordering my Borla before the snow starts flying here...
__________________
Reply With Quote
  #46  
Old 10-07-2012, 07:02 PM
five.7 Hemi's Avatar
Member
My Jeep: 2012 5.7L WK2
 
Join Date: May 2012
Location: Spring, TX
Posts: 504
Thanks: 1
Thanked 5 Times in 5 Posts
Rep Power: 1380
five.7 Hemi is on a distinguished road
Garage
Re: Dynomax cat back system

Well the snow never flys here and I'm not sure when I'll get around to it.
__________________
[SIGPIC][/SIGPIC]
:boobies: <-- oh yeah! :D
Reply With Quote
  #47  
Old 10-09-2012, 07:03 AM
etennyson's Avatar
Member
My Jeep: 2012 5.7L WK2
 
Join Date: Jul 2012
Location: Houston, Texas
Posts: 149
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 936
etennyson is on a distinguished road
Garage
Re: Dynomax cat back system

My dynomax exhaust system comes in today.....yay! five.7 Hemi, what tools are needed for the installation?
__________________
Reply With Quote
  #48  
Old 10-09-2012, 12:56 PM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Dec 2009
Location: Milwaukee, WI
Posts: 54
Thanks: 0
Thanked 2 Times in 1 Post
Rep Power: 1786
binford6100 is on a distinguished road
Re: Dynomax cat back system

Quote:
Originally Posted by etennyson View Post
My dynomax exhaust system comes in today.....yay! five.7 Hemi, what tools are needed for the installation?
FWIW, I paid $57.00 at a local exhaust shop that specializes in custom work for muscle cars, etc. I didn't think that the local Mid*s or Ca*X would be willing to install it.

After watching experienced hands wrestle the old system out from the rear hangers, I think the money was well spent. I'm all about DIY, but I felt that up on a lift would be the best way to locate and fix any leaks that might be present after the install. :-)
__________________

__________________
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
4.7 V8 Gibson Cat Back DGoral31 Engine Performance/Intake/Exhaust 73 05-06-2012 09:20 PM
WK Magnaflow Cat Back Redrubicon2004 Grand Cherokee - WK 13 09-29-2010 02:59 PM
Mopar Cat back Exhaust 1 GRAND Grand Cherokee - WK 9 01-29-2010 01:53 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 02:27 AM.


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