Exhaust Questions - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ctk1 · 10-08-2009, 04:34 PM

First off, I installed the loudmouth 1 last night, sounds good, wich it was louder, and the deceleration popping is annoying.

First question...I have heard that you can program the popping out of the car. Will a hand help tuner like the Diablo Sport do this or do I need to take it to a shop?

2nd...Does anybody know a good tuner in the central Pennsylvania area?

3rd...The exhaust sounds much better, but I wish it was louder. Do all 4 cats have oxygen sensors? What would removing 2 cats do as far as throwing codes? How will the car run?

ZZcamaro · 10-08-2009, 04:43 PM

If you have an automatic trans, thn you can turn off the AFM and it will help the popping A LOT. You will need a real tuner to do it, the handhelds will nto do it. Also you will not get rid fo all the popping, you WILL have that in an exhaust that is so free-flowing.

I could set you up with some tuners here in western PA that I know and trust. If you are open to coming out here for an afternoon of tuning, I would be hapy to set you up, just PM me and I can help you out.

To get a little more sound I would remove a set of resonators...That is the easiest and safest way to get some more sound. It is an easy job.

Quote:

Originally Posted by ctk1

First off, I installed the loudmouth 1 last night, sounds good, wich it was louder, and the deceleration popping is annoying.

First question...I have heard that you can program the popping out of the car. Will a hand help tuner like the Diablo Sport do this or do I need to take it to a shop?

2nd...Does anybody know a good tuner in the central Pennsylvania area?

3rd...The exhaust sounds much better, but I wish it was louder. Do all 4 cats have oxygen sensors? What would removing 2 cats do as far as throwing codes? How will the car run?

LightningSS · 10-08-2009, 04:45 PM

I kinda like the popping. Happens reliably at 1200 rpm when slowing down...

Rodrunner · 10-08-2009, 08:54 PM

ZZcamaro is right, ctk1, the resonators, not the cats, are deadening your sound. You should have installed a true catback exhaust or just eliminated the mufflers (muffler delete).
With an auto, the AFM is easily "turned off" by putting the shifter in the M position and then using either of the tap-shift buttons. As far as I can tell though, it has no effect on the popping. With the auto and no mufflers, mine (popping) is not loud or annoying.

defragme · 10-08-2009, 09:00 PM

Quote:

Originally Posted by Rodrunner

ZZcamaro is right, ctk1, the resonators, not the cats, are deadening your sound. You should have installed a true catback exhaust or just eliminated the mufflers (muffler delete).
With an auto, the AFM is easily "turned off" by putting the shifter in the M position and then using either of the tap-shift buttons. As far as I can tell though, it has no effect on the popping. With the auto and no mufflers, mine (popping) is not loud or annoying.

The loudmouth I is just a muffler delete.

bdg · 10-08-2009, 09:11 PM

I have to agree on the decel. popping. I can not stand it. I did the muff. delete and will be ordering a cat back soon.

Rodrunner · 10-08-2009, 09:16 PM

Quote:

Originally Posted by defragme

The loudmouth I is just a muffler delete.

By muffler delete I mean getting rid of the stock mufflers and replacing them with straight pipe. I believe the SLP Loudmouth I does incorporate a baffling chamber and packing of some sort and is not just a pipe.

defragme · 10-08-2009, 09:17 PM

From all the pics and discussion I have seen it is just a bolt on DIY muffler delete. Basically an axle back kit that is just a pipe. It is pretty expensive for what it is IMO.

defragme · 10-08-2009, 09:18 PM

BTW - The loudmouth II is the one with the muffler I think.

Rodrunner · 10-08-2009, 09:19 PM

I stand corrected. Sorry defrag!

ORANGE U NV · 10-09-2009, 12:32 PM

I have a L99 w/ a CAI and added the LMII. I have no "popping" & just hear the AFM a little more. I think anytime you increase your exhuast volume you are going to hear the AFM sound difference more. I will be doing a tune to eliminate the AFM as soon as I'm ready to cut my powertrain warranty loose.

Buffnshine · 10-09-2009, 01:16 PM

Sorry for sounding ignorant, can some one expalin what AFM is. I just picked up a 1SS/RS automatic (I guess that is the L99 not the LS3 as was told). I would rather have the 6 speed but couldnt pass on the deal on this one as it was a cancelled order and was their as they rolled it off the truck. OMG I love this car. Anyways the exhaust is where Chevy really missed the mark, so trying to rectify that. Very interesting adn informative posts here on the CAI as well, CALI car so have to check on smoging that.

Blood · 10-09-2009, 05:22 PM

First mistake was buying exhaust lol

get QTP electric cut outs!
450$ so cheap!

MoranoRacing · 10-09-2009, 05:25 PM

If you don't like the popping sound consider an exhaust with mufflers. Perhaps you would like the loudmouth 2 better. It comes with mufflers but is still on the loud side.

10-08-2009, 04:34 PM	#1
ctk1 Camarofanatic Drives: 1969 SS, 1998 RS, 2010 VR 2SS/RS Join Date: Sep 2008 Location: Gallitzin PA Posts: 1,433	Exhaust Questions First off, I installed the loudmouth 1 last night, sounds good, wich it was louder, and the deceleration popping is annoying. First question...I have heard that you can program the popping out of the car. Will a hand help tuner like the Diablo Sport do this or do I need to take it to a shop? 2nd...Does anybody know a good tuner in the central Pennsylvania area? 3rd...The exhaust sounds much better, but I wish it was louder. Do all 4 cats have oxygen sensors? What would removing 2 cats do as far as throwing codes? How will the car run?

10-08-2009, 08:54 PM	#4
Rodrunner Senior Member Drives: 2010 SS/RS, '06 350Z Join Date: Oct 2008 Location: So. Maryland Posts: 2,326	ZZcamaro is right, ctk1, the resonators, not the cats, are deadening your sound. You should have installed a true catback exhaust or just eliminated the mufflers (muffler delete). With an auto, the AFM is easily "turned off" by putting the shifter in the M position and then using either of the tap-shift buttons. As far as I can tell though, it has no effect on the popping. With the auto and no mufflers, mine (popping) is not loud or annoying. __________________ 2SS/RS - Black/Black - CGM Rally Stripes - Auto - VIN 10171

10-08-2009, 09:19 PM	#10
Rodrunner Senior Member Drives: 2010 SS/RS, '06 350Z Join Date: Oct 2008 Location: So. Maryland Posts: 2,326	I stand corrected. Sorry defrag! __________________ 2SS/RS - Black/Black - CGM Rally Stripes - Auto - VIN 10171

10-09-2009, 12:32 PM	#11
ORANGE U NV Drives: The Wife Crazy Join Date: Jul 2009 Location: TAMPA BAY Posts: 550	I have a L99 w/ a CAI and added the LMII. I have no "popping" & just hear the AFM a little more. I think anytime you increase your exhuast volume you are going to hear the AFM sound difference more. I will be doing a tune to eliminate the AFM as soon as I'm ready to cut my powertrain warranty loose. __________________ "God is great, beer is good and people are crazy" 2010 2SS IOM/IOM L99 Black Rally Stripes, Polished Wheels, Loudmouth II, Rotofab CAI, IOM Heritage Grille,Tune by Jeremy Formato (Fasterproms Tuning).

10-09-2009, 01:16 PM	#12
Buffnshine So Cal Camaro5 Race Team Drives: '10 SS/RS, '06 HHR, '70 El Camino Join Date: Sep 2009 Location: Huntington Beach, CA Posts: 2,589 View My Garage	Sorry for sounding ignorant, can some one expalin what AFM is. I just picked up a 1SS/RS automatic (I guess that is the L99 not the LS3 as was told). I would rather have the 6 speed but couldnt pass on the deal on this one as it was a cancelled order and was their as they rolled it off the truck. OMG I love this car. Anyways the exhaust is where Chevy really missed the mark, so trying to rectify that. Very interesting adn informative posts here on the CAI as well, CALI car so have to check on smoging that. __________________ TEAM L99 - So Cal Camaro5 Race Team #27 9/5/09 Purchased #36962 Black 1SS/RS L99 "E-TCKT" Base Dyno 328hp/341tq @BBK meet Mods to Date: Window Tint 5% & 15%, ACC P13W Lighting, Adaptive DRL Harness, Ghost Armor, Lloyds "SS" Mats, Dash Plaque, Flowmaster Outlaw Exhaust, Drake Front Bowtie Delete, Stealth 3457 Chrome/Mirror Signal Bulbs, Grant Revolutions Steering Wheel, PFADT Sport Springs, Sway Bars, End Links, Trailing Arms, 4 Wheel Alignment, Hurst Auto Shifter and Paddle Shifter, Satin Black Rear Tail Light Bezels Last edited by Buffnshine; 10-12-2009 at 05:43 AM.

10-08-2009, 04:45 PM	#3
LightningSS Drives: WAS '10 SS IBM, NOW '14 BRM ZL1 Join Date: Jun 2009 Location: WA Posts: 170	I kinda like the popping. Happens reliably at 1200 rpm when slowing down...

10-08-2009, 09:11 PM	#6
bdg Drives: 2010 camaro Join Date: Sep 2009 Location: Tx. Posts: 93 View My Garage	I have to agree on the decel. popping. I can not stand it. I did the muff. delete and will be ordering a cat back soon.

10-08-2009, 09:17 PM	#8
defragme Drives: 2SS/RS LS3 Join Date: Sep 2009 Location: Morehead, KY Posts: 77	From all the pics and discussion I have seen it is just a bolt on DIY muffler delete. Basically an axle back kit that is just a pipe. It is pretty expensive for what it is IMO.

10-08-2009, 09:18 PM	#9
defragme Drives: 2SS/RS LS3 Join Date: Sep 2009 Location: Morehead, KY Posts: 77	BTW - The loudmouth II is the one with the muffler I think.

10-09-2009, 05:22 PM	#13
Blood Drives: 2003 Silverado z71 1500 Join Date: Oct 2009 Location: Texas Posts: 272	First mistake was buying exhaust lol get QTP electric cut outs! 450$ so cheap! __________________ www.greenhousesforsale.org.uk www.doubledinnavigation.com

10-09-2009, 05:25 PM	#14
MoranoRacing Account Suspended Drives: 2005 GTO, 1973 Camaro Join Date: Aug 2009 Location: Westchester Posts: 460	If you don't like the popping sound consider an exhaust with mufflers. Perhaps you would like the loudmouth 2 better. It comes with mufflers but is still on the loud side.

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