Exhaust Popping During Decel - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

lee215 · 09-09-2009, 06:25 AM

My LS3 cracks and pops during decel- i didnt like it with the stock exhaust- now with an MBRP catback its real bad. I know some guys like this sound but i dont, even find myself dumping the clutch at a red light so it doesnt do it.
Anyone have any info or suggestions on how to make it stop? I know if i ask my dealer they will tell me its because of the catback.

4SD FED · 09-09-2009, 06:51 AM

I thinks it's a back pressure, the more back presure the less it will make the noise, but a free flowing exhaust will have less back pressure, so it's something we mut live with... I like the noise

Camar0wn3d · 09-09-2009, 07:12 AM

Yea I don't like it either...from what I can tell it has to do with the exhaust gases igniting in the exhaust pipes. My best guess is the chambers in the stock mufflers provided a buffer to allow the expanding gases be dampened. With straight pipes, or MBRP, etc. there is nowhere for the expanding gases to go except out the tailpipe at full force.

tandtperformance · 09-09-2009, 07:17 AM

did you have it tuned after exhaust if not this will help some it did mine

Camar0wn3d · 09-09-2009, 07:26 AM

That makes sense because after I put a Leo Vince full exhaust on my R6 and revved it, as the RPM's went back down it would pop and a flame about 6" long would shoot out of the exhaust... I later installed a power commander III and it stopped. :(

Now, I could handle the popping if I could get the Camaro to shoot flames...that would be sweet.

lee215 · 09-09-2009, 07:39 AM

When you say "tuned" do you mean a hand held unit like a hypertech or predator, or garage or shop?

Crowley · 09-09-2009, 07:41 AM

Quote:

Originally Posted by lee215

When you say "tuned" do you mean a hand held unit like a hypertech or predator, or garage or shop?

I think it could be either or. I have the popping with my combo (ARH system and stock axelback). I have heard it can be tuned out, but at the expense of a few MPG. It is bothersome, but not enought to worry about it.

Crowley

Andro · 09-09-2009, 07:46 AM

With my enigine mods and when I had the stock exhaust on it did it alot but once I installed the kooks 3 inch exhaust system and a new tune it's barely noticable

Michael_Js · 09-09-2009, 08:35 AM

Yeah, mine (stock) does it also and I think it's cool. However, today I get the Zoomers CAT back exhaust installed, so, we'll see what the drive home sounds like

WeeZee · 09-09-2009, 09:03 AM

Get a good dynotune, hand-held's are ok but cost more, WTF ?
"Most V8's with guts do it so get used to it up to a point"

fdjizm · 09-09-2009, 09:09 AM

i think most all manual cars do this, and i love those pops and burbles

Sack Rat 2SS · 09-09-2009, 09:14 AM

Usually a high quality X-pipe solves this problem. I do not know what your MBRP cat-back system includes. Listen to the sound clip on the ADM install of Magnaflow 3inch system that includes the type of X-pipe I am referring to. The sound clip has no pops etc. in it at all during reving and driving. I had a similar problem, which I dislike, on my Vette and a quality x-pipe solved the problem years ago. Check it out.

rharon · 09-09-2009, 09:21 AM

It's a borderline backfirethat people walking down the street would duck! LOL it wasn't bad with the stock system, I liked it. But when you open up the stock exhaust it gets loud

BlackinBlack · 09-09-2009, 10:10 AM

My MBRP system does this too but it is not very loud. My stock exhaust had the same burble/pop and I feel it was MORE noticeable with the quieter exhaust. I personally kind of like it.

09-09-2009, 06:25 AM	#1
lee215 Drives: 1969 SS 2013 ZL1 Join Date: Aug 2009 Location: central pa Posts: 9	Exhaust Popping During Decel My LS3 cracks and pops during decel- i didnt like it with the stock exhaust- now with an MBRP catback its real bad. I know some guys like this sound but i dont, even find myself dumping the clutch at a red light so it doesnt do it. Anyone have any info or suggestions on how to make it stop? I know if i ask my dealer they will tell me its because of the catback.

09-09-2009, 06:51 AM	#2
4SD FED Drives: 2010 rs/ss camaro Join Date: Sep 2009 Location: Rochester Mich Posts: 340	I thinks it's a back pressure, the more back presure the less it will make the noise, but a free flowing exhaust will have less back pressure, so it's something we mut live with... I like the noise __________________

09-09-2009, 07:12 AM	#3
Camar0wn3d formerly "wh0rsep0wer" Drives: 2016 1SS Summit White Join Date: Oct 2008 Location: Myrtle Beach, SC Posts: 489	Yea I don't like it either...from what I can tell it has to do with the exhaust gases igniting in the exhaust pipes. My best guess is the chambers in the stock mufflers provided a buffer to allow the expanding gases be dampened. With straight pipes, or MBRP, etc. there is nowhere for the expanding gases to go except out the tailpipe at full force. __________________ 2010 1SS/RS - CGM/Gray Interior - M6 (SOLD) Kooks 1 7/8" headers, Solo Mach-X, Vararam. 2012 2LS - Black A6 (SOLD) 2016 1SS Summit White A8

09-09-2009, 07:26 AM	#5
Camar0wn3d formerly "wh0rsep0wer" Drives: 2016 1SS Summit White Join Date: Oct 2008 Location: Myrtle Beach, SC Posts: 489	That makes sense because after I put a Leo Vince full exhaust on my R6 and revved it, as the RPM's went back down it would pop and a flame about 6" long would shoot out of the exhaust... I later installed a power commander III and it stopped. :( Now, I could handle the popping if I could get the Camaro to shoot flames...that would be sweet. __________________ 2010 1SS/RS - CGM/Gray Interior - M6 (SOLD) Kooks 1 7/8" headers, Solo Mach-X, Vararam. 2012 2LS - Black A6 (SOLD) 2016 1SS Summit White A8

09-09-2009, 07:46 AM	#8
Andro NOICE!!! ™ Drives: Force Fed 427 Join Date: Jan 2009 Location: GOT BOOST? Posts: 5,213 View My Garage	With my enigine mods and when I had the stock exhaust on it did it alot but once I installed the kooks 3 inch exhaust system and a new tune it's barely noticable __________________

09-09-2009, 07:17 AM	#4
tandtperformance Drives: 2010 Camaro 2011 PACE CAR 2012 ZL1 Join Date: Mar 2009 Location: frederick Posts: 969	did you have it tuned after exhaust if not this will help some it did mine

09-09-2009, 07:39 AM	#6
lee215 Drives: 1969 SS 2013 ZL1 Join Date: Aug 2009 Location: central pa Posts: 9	When you say "tuned" do you mean a hand held unit like a hypertech or predator, or garage or shop?

09-09-2009, 08:35 AM	#9
Michael_Js SoCal C5 Family Member Drives: 2010 Camaro SS/RS - Black w/IOM; 6M Join Date: Jul 2009 Location: San Diego, CA, USA Posts: 5,298 View My Garage	Yeah, mine (stock) does it also and I think it's cool. However, today I get the Zoomers CAT back exhaust installed, so, we'll see what the drive home sounds like __________________ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~ 2010 Black 2SS/RS; 6M; IOM, GFX, sunroof; ADM Race CAI; Zoomers CB; Viper Alarm; Pdaft F&R sways, Adj Endlinks, Rtrailing arms, Camber kit, strut brace, Front Trailing Arm Bushing; SLP Skip-Shift Elim; Tinted lights/windows; Hurst Short-throw; LoJack; Door & Dash ABL Mods; ********; JBA Shorty headers; AACStyle LEDs; Stillen DS rotors, Hawk Ceramic pads; Havoc Blk Chrome wheels: 20x9s; Lingenfelter Blk Al Pedals; RevXtreme Catch Can; Goodridge SS lines; Ported TB; RK Sport hood; Hotchkis chassis brace; KW V3 coilovers;

09-09-2009, 09:03 AM	#10
WeeZee Drives: SuperSport's Join Date: May 2009 Location: Michigan Posts: 382	Get a good dynotune, hand-held's are ok but cost more, WTF ? "Most V8's with guts do it so get used to it up to a point" __________________ 2002 Chevy CamaroSS MN6 '08 Chevy TBSS AWD "DD" Plans : 2013 CamaroSS 1LE

09-09-2009, 09:09 AM	#11
fdjizm Account Suspended Drives: 2008 Mustang GT/CS Join Date: Mar 2009 Location: New Jersey Posts: 1,429 View My Garage	i think most all manual cars do this, and i love those pops and burbles

09-09-2009, 09:14 AM	#12
Sack Rat 2SS Drives: Silver SS/RS, Man 6 Join Date: Apr 2009 Location: DFW area, Texas Posts: 884	Usually a high quality X-pipe solves this problem. I do not know what your MBRP cat-back system includes. Listen to the sound clip on the ADM install of Magnaflow 3inch system that includes the type of X-pipe I am referring to. The sound clip has no pops etc. in it at all during reving and driving. I had a similar problem, which I dislike, on my Vette and a quality x-pipe solved the problem years ago. Check it out. __________________ Silver 2SS/RS Man/6 CTS-V front 6-Piston Calipers, GM 3.91 Rear Gears

09-09-2009, 09:21 AM	#13
rharon Drives: 2010 Yellow 2SS/RS Join Date: Jun 2009 Location: Fresno / Clovis , CA Posts: 328 View My Garage	It's a borderline backfirethat people walking down the street would duck! LOL it wasn't bad with the stock system, I liked it. But when you open up the stock exhaust it gets loud __________________ Magnacharger TVS2300, ARH HEADERS, ROTO-FAB CAI, NOWEEDS.NET DIVERTERS

09-09-2009, 10:10 AM	#14
BlackinBlack Drives: 2016 Corvette Z06 Blade Silver Join Date: Jun 2009 Location: Florida Posts: 822	My MBRP system does this too but it is not very loud. My stock exhaust had the same burble/pop and I feel it was MORE noticeable with the quieter exhaust. I personally kind of like it. __________________ 2016 2LZ Z06 Blade Silver 2013 ZL1 BLACK on BLACK <SOLD> Roto-Fab CAI 2010 2SS/RS BLACK on BLACK <SOLD> 3" MBRP 304 Stainless Exhaust Roto-Fab CAI

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