| 2004-2007 Cadillac CTS-V Performance Mods Discuss all Cadillac CTS-V performance modifications here. Engine tunes, exhaust, intake, suspension and more. | Cadillac Forums: Exhaust Sounds Different...Any Ideas? 
05-21-09, 10:24 PM
|  | Cadillac Owners Connoisseur Cadillac(s): 2005 Redline CTS-V, 1997 Catera  | | Join Date: Mar 2007 Location: Purdue University | | | Exhaust Sounds Different...Any Ideas?
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05-21-09, 10:49 PM
|  | Cadillac Owners Connoisseur Cadillac(s): 2005 CTS-V | | Join Date: Nov 2005 Location: Spring, Texas | | | Re: Exhaust Sounds Different...Any Ideas?
It sounds different to me, but I do not know what it could be other than gradual deteriotation of the cats/resonator/mufflers. |
05-21-09, 11:32 PM
|  | Cadillac Owners Member Cadillac(s): 2005 CTS-V | | Join Date: May 2009 Location: Midwest | | | Re: Exhaust Sounds Different...Any Ideas?
Had the same on my M5 granted different cars, but it was the CAT deteriorating, don't know as much considering I'm a newbie but, it may also be baffles in your mufflers going. |
05-21-09, 11:35 PM
| | Cadillac Owners Connoisseur Cadillac(s): 2005 Redline CTS-V, 1997 Catera | | Join Date: Mar 2007 Location: Purdue University | | | Re: Exhaust Sounds Different...Any Ideas?
Hmmm....maybe I should just gut the cats... |
05-21-09, 11:46 PM
| | Cadillac Owners Connoisseur Cadillac(s): 2005 CTS-V | | Join Date: Nov 2005 Location: Spring, Texas | | | Re: Exhaust Sounds Different...Any Ideas?
Quote:
Originally Posted by SkullV  Hmmm....maybe I should just gut the cats... | Those cats may be self-gutting - just be patient. |
05-22-09, 12:43 AM
|  | Cadillac Owners Enthusiast Cadillac(s): 2005 CTS-V, Black | | Join Date: Jun 2008 Location: Northern New Jersey | | | Re: Exhaust Sounds Different...Any Ideas?
Also agree on the cats. After I got my cats replaced with high flow ones on my GT, they got considerably louder as time passed. I wouldn't worry about it though, the car sounds good 
__________________ 2005 Raven Black w/ Sunroof... CAGS - UUC Shifter & Bushings w/ 09 V Shift Knob - Magnaflow Exhaust - 20% Tint - Blacked Out Rear & Sidemarkers - Creative Steel Motor Mounts/Trans Mount - UUC Diff Bushing - CTS Armrest - K&N CAI - Chrome OEM rims - Goodyear F1's - 07 Diff with KARS III - Ultimate Pedals - GM drilled/slotted rotors - Sea-V Billet Lock Pulls - Valentine 1 - Wait4Me Tune - JL Audio 10" W6V2 Sub Swap - Heavy's Fire Extinguisher ... waiting to go on: clear fogs  |
05-22-09, 02:51 AM
|  | Cadillac Owners Connoisseur Cadillac(s): 2007 Cadillac CTS-V | | Join Date: Apr 2007 Location: Plano, TX Age: 27 | | | Re: Exhaust Sounds Different...Any Ideas?
Wow...almost the same set up and our cars sound WAY different!
I too have more popping as time goes on.
Last edited by whisler151; 05-22-09 at 02:56 AM.
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05-22-09, 03:47 AM
| | Cadillac Owners Fanatic Cadillac(s): Raven Black 2004 CTS-V. Broken Diff! | | Join Date: Jan 2009 Location: San Juan Capistrano, CA Age: 26 | | | Re: Exhaust Sounds Different...Any Ideas?
sounds fantastic to me  |
05-22-09, 07:44 AM
|  | Cadillac Owners Connoisseur Cadillac(s): '05 CTS-V, '00 SLS, 98 SLS, 89 Eldo, '80 Eldo | | Join Date: Mar 2006 Location: NYC Age: 38 | | | Re: Exhaust Sounds Different...Any Ideas?
You better get under there, and take a look. Sounds like one of those corsa losers swapped out your Magnaflow while you were hungover one night.
Just sayin.....
Hey, isn't the popping a condition of a lean mixture? And doesn't that kill your cats, if you have the rear O2s turned off?
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05-22-09, 12:34 PM
| | Cadillac Owners Connoisseur Cadillac(s): 2005 Redline CTS-V, 1997 Catera | | Join Date: Mar 2007 Location: Purdue University | | | Re: Exhaust Sounds Different...Any Ideas?
Quote:
Originally Posted by Twitch You better get under there, and take a look. Sounds like one of those corsa losers swapped out your Magnaflow while you were hungover one night.
Just sayin.....
Hey, isn't the popping a condition of a lean mixture? And doesn't that kill your cats, if you have the rear O2s turned off? | From what I understand popping is a side effect of swapping out your resonator for an x pipe... |
05-22-09, 12:45 PM
| | Cadillac Owners Connoisseur Cadillac(s): '05 CTS-V, '00 SLS, 98 SLS, 89 Eldo, '80 Eldo | | Join Date: Mar 2006 Location: NYC Age: 38 | | | Re: Exhaust Sounds Different...Any Ideas?
Quote:
Originally Posted by SkullV From what I understand popping is a side effect of swapping out your resonator for an x pipe... | Very much doubt that. I have an x pipe with no popping at all.
I could be wrong (I'm certainly not one of the "smart" guys). But back in my bike days, when you change the exhaust, sometimes you get the popping on decel. Change the jets to richen up the mixture, and the popping was gone.
It doesn't sound bad, but compared to what it sounded like last year, I'd be pissed. |
05-22-09, 12:55 PM
| | Cadillac Owners Connoisseur Cadillac(s): 2005 Redline CTS-V, 1997 Catera | | Join Date: Mar 2007 Location: Purdue University | | | Re: Exhaust Sounds Different...Any Ideas?
Quote:
Originally Posted by Twitch Very much doubt that. I have an x pipe with no popping at all.
I could be wrong (I'm certainly not one of the "smart" guys). But back in my bike days, when you change the exhaust, sometimes you get the popping on decel. Change the jets to richen up the mixture, and the popping was gone.
It doesn't sound bad, but compared to what it sounded like last year, I'd be pissed. | Yeah, I do remember adding a little fuel to the mix being the solution to reducing the popping...I am less concerned with the popping then the terrible sound it makes RIGHT after you let off the gas though. From what people are telling me its the cat's breaking down |
05-22-09, 12:55 PM
|  | <----- go ahead and stare Cadillac(s): Maggied '05 CTS-V | | Join Date: Jan 2008 Location: West Chester, PA Age: 26 | | | Re: Exhaust Sounds Different...Any Ideas?
Might you have any exhaust leaks that are changing the flow of exhaust?
I thought popping was from un-burnt fuel (rich mixture)? I thought the tuning solution to getting rid of the pop was removing fuel on decel?
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05-22-09, 01:47 PM
| | Cadillac Owners Connoisseur Cadillac(s): 2005 Redline CTS-V, 1997 Catera | | Join Date: Mar 2007 Location: Purdue University | | | Re: Exhaust Sounds Different...Any Ideas?
Well does anyone have any ideas of what to do about it? Would gutting the cat's work? I have heard that gutting them decreses velocity and is a no-no, and that I should either run a straight pipe through them or get test pipes made. |
05-22-09, 01:56 PM
| | Cadillac Owners Connoisseur Cadillac(s): Kooks,MOMO seats,C5 hubs,3489# | | Join Date: Jun 2007 Location: Ashland, Ohio | | Just the opposite. DFCO or decel fuel cut off is a major contributor to popping.
Ted, you'll have to pull the exhaust to take a look at the cats. 
Norm Quote:
Originally Posted by CTSV_510 Might you have any exhaust leaks that are changing the flow of exhaust?
I thought popping was from un-burnt fuel (rich mixture)? I thought the tuning solution to getting rid of the pop was removing fuel on decel? | | | Cadillac Discussion Tools | | | 
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