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08-07-2013, 05:36 AM
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#1 |
 
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Exhaust pop?
Sometimes on start up or high RPM deaccleration my exhaust has a loud pop(once) almost like a engine back fire sound. I bought this vechile used the orginal owner had the muffler/cats/resonators deleted. And had true duals put on coming right off the headers. Since I live in a low population area this is fine (no emissions) I have talked to other SS owners around and some says their cars pop also when deacclerating from high RPM. Any ideals what could be causing this? Car runs great not trowing any codes or anything. Was just curious what was causing this and if I should be concerned or not? The vechile never does this it I'm in drive or sports mode btw in M using the paddle shifters.
Thanks
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Mods- Top Speed 3" LT headers catless, 3" Top Speed Catback, Tuned at ADM, Cold Air Inductions CAI, Elite catch can, ADM racing scoop
Interior-(amber) interior dome, trunk, port custom sub box, 10" sub, 1000watt kenwood amp, sumbthump harness, CDF short shifter, epco shift knob, vitesse paddle shifters Exterior (amber)-mailslot scanner, grill illumnation kit, halos, fog halos, drl nightime harness, Rear Led bowtie. Painted Heritage grill, hex vents Body-removed stock decals had painted in inferno orange |
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08-07-2013, 05:47 AM
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#2 |
Drives: 2000 Camaro SS Join Date: Feb 2010
Location: Louisville, Ky.
Posts: 25,179
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Decel pop is due to the way these cars are tuned from the factory. Very normal.
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08-07-2013, 06:07 AM
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#3 |
 Drives: 2010 CGM 2SS/RS - L99 Join Date: Mar 2013
Location: Southern Pines, NC
Posts: 197
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Yup I love decel pop
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2010 CGM 2SS/RS - L99
--------------------------------- Performance: Vararam CAI, Vmax Ported Throttle Body, GM Performance Dual Mode Exhaust (NPP), JRE Tune, Hotchkis TVS Stage 2 Track Pack, Vitesse Paddle Shifters, Vitesse Throttle Controller Functional: Hex Vents, Elite Catch Can, WeatherTech Digital Fit Mats, Escort Passport Max Cosmetic: Heritage Grill, GM Splash Guards, ZL1 Rockers |
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08-07-2013, 06:40 AM
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#4 |
   
Drives: 2013 Camaro 2SS RS LS3 Join Date: Feb 2011
Location: Grand Rapids, MI
Posts: 1,058
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I loooove the pop also. It sounds so great throught the NPP exhaust btw!
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 -2013 Summit White over Inferno Orange 2SS RS- -2014 White Diamond Silverado Z71 Crew Cab Short Box- |
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08-07-2013, 06:50 AM
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#5 |
 
Drives: black 2011 2ss Join Date: Apr 2011
Location: plain city utah
Posts: 248
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Mine does it (headers/ muffler delete) normal
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 FASTER THAN A SPEEDING TICKET 2011 cammed 3600 stall LSA super charger. 68 cammed 2800 stall 4/11 posi |
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08-07-2013, 06:52 AM
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#6 |
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Right on doesn't bother me was just wanting to make sure thanks guys
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Mods- Top Speed 3" LT headers catless, 3" Top Speed Catback, Tuned at ADM, Cold Air Inductions CAI, Elite catch can, ADM racing scoop
Interior-(amber) interior dome, trunk, port custom sub box, 10" sub, 1000watt kenwood amp, sumbthump harness, CDF short shifter, epco shift knob, vitesse paddle shifters Exterior (amber)-mailslot scanner, grill illumnation kit, halos, fog halos, drl nightime harness, Rear Led bowtie. Painted Heritage grill, hex vents Body-removed stock decals had painted in inferno orange |
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08-07-2013, 07:36 AM
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#7 |
 
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The popping sound is called exhaust reversion. It is caused by rich unburnt exhaust gasses meeting with oxygen rich air that pulses up the tail pipes when the throttle is closed. It is caused by the camshaft overlap (when the intake and exhaust valves are open at the same time to aid in exhaust scavenging within the cylinders.
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Live in peace but defend it...Embrace it but never take it for granted...
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08-07-2013, 07:50 AM
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#8 |
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PHAT B33
Drives: 2012 TF3 Camaro 2SS/RS M6 Join Date: Jun 2012
Location: Dark of the Moon
Posts: 1,460
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In our case, it happens when DFCO (decel fuel cut off) occurs.
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Another 1 of 371 '12 T3 LS3 M6's built.
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08-07-2013, 07:53 AM
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#9 |
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V8 Lounge member #2
Drives: 2001 Ws6 Join Date: Sep 2009
Location: Burbank,IL
Posts: 6,373
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Also the car has "true" dual exhaust from the factory.
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2001 ws6, 40k miles, Ls3 416 stroker, short block built by PER the rest by me. LPE Ls3 heads milled to 12-1 comp, FAST 102, NW 102, kooks 2", dual DMH cutouts, Magnaflow C/B, BTR cam + springs. Full UMI suspension.
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08-07-2013, 07:54 AM
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#10 |
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No Tags/Habitual Violator
Drives: 2012 SIM 2SS/RS & z71 Join Date: Sep 2011
Location: North Georgia
Posts: 2,379
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Janetty tuned mine out by request. I think the pipes collect more soot.
I have a new car with factory tune that pops. No plans to change this one. |
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08-07-2013, 08:26 AM
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#11 | |
Drives: 2013 2SS/RS/1LE Join Date: Jun 2013
Location: Irmo, SC
Posts: 149
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Quote:
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08-07-2013, 12:35 PM
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#12 | |
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Drives: 2013 Camaro 2SS RS LS3 Join Date: Feb 2011
Location: Grand Rapids, MI
Posts: 1,058
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Quote:
I bet it does! 
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-2013 Summit White over Inferno Orange 2SS RS- -2014 White Diamond Silverado Z71 Crew Cab Short Box- |
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08-07-2013, 12:39 PM
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#13 |
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Emerald Coast Camaros
Drives: 2010 Camaro 2LT/RS M6 Join Date: Nov 2009
Location: Tallahassee FL
Posts: 9,687
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Happens all the time to me and I love the sound
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08-07-2013, 01:11 PM
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#14 |
 
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NPP does it more than my Loudmouth I on my 02 did. Not complaining
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 2013 SS/RS 1LE VR-Backup System, SOLO Perforsance HF Cats, Muffler Delete, BBK Off-road X-pipe 2002 35th Aniversary SLP SS-Sold |
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