Eliminating the raspy sounds - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Mint · 12-17-2013, 10:49 PM

Hey guys,

I've been searching around the forums for a while now but couldn't seem to find what I've been looking for. I have a 2013 Camaro 1SS (L99) and I recently added a Flowmaster American thunder series axle back exhaust with Borla LT offroad headers (no cats). Now I get this annoying raspy sound past 2500 RPM

I know the rasp sound is because there is a mid pipe instead of cat converters but I wanted to tone it down.

I was looking at a MagnaFlow x-pipe (11386) instead of the stock L99 resonator. Would this calm down the Rasp?

If not, what other options would there be? I don't believe that there are high-flow cats that can connect to these headers but if so please tell me.

Main Question: Will http://www.summitracing.com/parts/mpe-11386/overview/ in replace of stock L99 exhaust resonators help quiet down rasp?

Thanks to anyone who helps me

BubbaSS · 12-17-2013, 11:12 PM

Are you sure its not a rattle?

Mint · 12-17-2013, 11:16 PM

Quote:

Originally Posted by BubbaSS

Are you sure its not a rattle?

No rattle. Its hard to explain fully. Its not the deep exhaust sound. Its more rasply/ higher pitched. Kinda sounds metally like a tin can at some points.

BubbaSS · 12-17-2013, 11:31 PM

If its definitely rasp then a standard xpipe won't really help, might even make it worse. Magnaflow offers a resonated xpipe that helps reduce rasp, not sure if thats the one you listed. Look in to it

Medi0cr3 · 12-17-2013, 11:37 PM

Yea the borla LT are very raspy....

jman17 · 12-18-2013, 06:38 AM

You may actullay be hearing the drive train. Headers will make the actual engine noises more pronounced.

axis · 12-18-2013, 08:14 AM

Resonated X pipe will help a little but the only way to really silence it is to slap on some high flow cats.

Mint · 12-18-2013, 08:40 AM

Quote:

Originally Posted by axis

Resonated X pipe will help a little but the only way to really silence it is to slap on some high flow cats.

Thanks. So the MagnaFlow resonated x-pipe will be quieter/less raspy than the stock resonator on the L99? That's what i'm hoping for.

JDP Sales · 12-18-2013, 11:31 AM

Quote:

Originally Posted by Mint

Thanks. So the MagnaFlow resonated x-pipe will be quieter/less raspy than the stock resonator on the L99? That's what i'm hoping for.

Correct, It will definitely help a lot, but just about anything anything short of adding cats will not completely eliminate the rasp.

Let us know if you have any questions.

Best regards,

Tyler
888-308-6007

Mint · 12-18-2013, 11:48 AM

Quote:

Originally Posted by Sales@JDP

Correct, It will definitely help a lot, but just about anything anything short of adding cats will not completely eliminate the rasp.

Let us know if you have any questions.

Best regards,

Tyler
888-308-6007

Thanks,
If a resonator isn't enough... What hi-flow cats, if any will be able to fit on my setup?
Borla XR-1 LT headers (17249) With the factory exhaust

Headers had a 2.5in collector w/ midpipe

axis · 12-18-2013, 09:23 PM

Quote:

Originally Posted by Mint

Thanks,
If a resonator isn't enough... What hi-flow cats, if any will be able to fit on my setup?
Borla XR-1 LT headers (17249) With the factory exhaust

Headers had a 2.5in collector w/ midpipe

If you're still running the factory L99 resonator, I highly doubt the magnaflow version is going to make much if any difference, in sound. As far as HFC's, you'll need to get with Borla to see what they recommend. From looking that them, it appears as though you'll need to do a little fab work to get them to work. I'd bet some slip-ons would fit with a little bit of cutting. If the collector is 2.5in, you'll need 2.5in to 2.5in slip on HFCs.

Camarodriver2 · 12-18-2013, 10:44 PM

With your setup, if you remove the stock center resonator, you'll go from raspy sound to full-on DRONE. You may want to change out the mufflers for Magnaflow for a deeper sound. The stock exhaust was actually designed properly and we're trying to make them sound like modified race cars. Fun, but an expensive learning process.

axis · 12-18-2013, 11:04 PM

Quote:

Originally Posted by Camarodriver2

With your setup, if you remove the stock center resonator, you'll go from raspy sound to full-on DRONE. You may want to change out the mufflers for Magnaflow for a deeper sound. The stock exhaust was actually designed properly and we're trying to make them sound like modified race cars. Fun, but an expensive learning process.

The factory mufflers do a very good job at eliminating drone. It's when you move to aftermarket mufflers, the drone appears.

Mint · 12-18-2013, 11:55 PM

Thanks for the replies. Drone doesn't affect me much due to my lack of highway driving. What is getting me annoyed is the raspy tin can sound from the exhaust. It's not as bad as others say theirs is but it's there. I'm going to try swapping the stock resonator for the magnaflow one. See if it works.

12-17-2013, 10:49 PM	#1
Mint Drives: 2013 Camaro SS Join Date: Jan 2013 Location: Jersey Posts: 343 View My Garage	Eliminating the raspy sounds Hey guys, I've been searching around the forums for a while now but couldn't seem to find what I've been looking for. I have a 2013 Camaro 1SS (L99) and I recently added a Flowmaster American thunder series axle back exhaust with Borla LT offroad headers (no cats). Now I get this annoying raspy sound past 2500 RPM I know the rasp sound is because there is a mid pipe instead of cat converters but I wanted to tone it down. I was looking at a MagnaFlow x-pipe (11386) instead of the stock L99 resonator. Would this calm down the Rasp? If not, what other options would there be? I don't believe that there are high-flow cats that can connect to these headers but if so please tell me. Main Question: Will http://www.summitracing.com/parts/mpe-11386/overview/ in replace of stock L99 exhaust resonators help quiet down rasp? Thanks to anyone who helps me Last edited by Mint; 12-18-2013 at 08:38 AM.

12-17-2013, 11:12 PM	#2
BubbaSS WHAT RED LIGHT?! Drives: 2011 Black Camaro 2SS/RS M6 Join Date: Apr 2011 Location: Miami, Florida Posts: 1,115	Are you sure its not a rattle? __________________ 2011 2SS/RS M6 BLACK - VARARAM NO TUNE INTAKE, MODDED AND PORTED TB, PORTED INTAKE MANIFOLD, VITESSE THROTTLE CONTROLLER, DOUG THORLEY LT'S, CATLESS, X-PIPE, 25" STAINLESS WORKS RETRO CHAMBERED MUFFLERS, CUSTOM 2.5" MANDREL BENT EXHAUST, RICHMOND 4.10 GEARS, CUSTOM CAM (231/242 @ 114LSA), MUSTANG DYNO TUNED BY TORQ, 20% CERAMIC TINTS, EIBACH PROKIT SPRINGS 1" DROP, HAWK PERFORMANCE CERAMIC BRAKES, NITTO INVO TIRES, HYDROCARBON TAIL LIGHT AND FOG LIGHT BEZELS BY EMBLEMPROS, METRA DASH KIT, JVC KW-AV71BT, PHOENIX GOLD iAMP GM1, PASSPORT QI45 - 450 RWHP 415 RWTQ

12-17-2013, 11:31 PM	#4
BubbaSS WHAT RED LIGHT?! Drives: 2011 Black Camaro 2SS/RS M6 Join Date: Apr 2011 Location: Miami, Florida Posts: 1,115	If its definitely rasp then a standard xpipe won't really help, might even make it worse. Magnaflow offers a resonated xpipe that helps reduce rasp, not sure if thats the one you listed. Look in to it __________________ 2011 2SS/RS M6 BLACK - VARARAM NO TUNE INTAKE, MODDED AND PORTED TB, PORTED INTAKE MANIFOLD, VITESSE THROTTLE CONTROLLER, DOUG THORLEY LT'S, CATLESS, X-PIPE, 25" STAINLESS WORKS RETRO CHAMBERED MUFFLERS, CUSTOM 2.5" MANDREL BENT EXHAUST, RICHMOND 4.10 GEARS, CUSTOM CAM (231/242 @ 114LSA), MUSTANG DYNO TUNED BY TORQ, 20% CERAMIC TINTS, EIBACH PROKIT SPRINGS 1" DROP, HAWK PERFORMANCE CERAMIC BRAKES, NITTO INVO TIRES, HYDROCARBON TAIL LIGHT AND FOG LIGHT BEZELS BY EMBLEMPROS, METRA DASH KIT, JVC KW-AV71BT, PHOENIX GOLD iAMP GM1, PASSPORT QI45 - 450 RWHP 415 RWTQ

12-17-2013, 11:37 PM	#5
Medi0cr3 Untamed Performance EPT Drives: 2011 2SS Join Date: Aug 2012 Location: El Paso Posts: 372	Yea the borla LT are very raspy.... __________________ Night Fury Cam Borla LT Headers and Borla Cat Back ATAK 9in. diff with 4.11's, DSS Axles, and Alum Shaft Hurst Short-Shifter; Ideal Garage Master Cylinder H-E Street Slayer Twin Billet Clutch BMR: Adjustable; Trailing Arms, Toe Rods, Extreme Sway Bar. BMR Subframe Bushings. Strange Rear Coilovers and mounts Tuned by Rhino79

12-18-2013, 06:38 AM	#6
jman17 Drives: 2011 SS-2/1969 SS Join Date: Aug 2011 Location: Wichita, Kansas Posts: 147 View My Garage	You may actullay be hearing the drive train. Headers will make the actual engine noises more pronounced. __________________ 1969 SS: SS/DA 427 CI/Auto 2011 SS-2 LS3 M6 MODS: P1X ProCharger, Squash dual fuel pumps, ID fuel injectors, Cam: Pat G designed/EPS Ground (228/234 .629”/.629” 114 LSA +4 advance), Lethal Racing ported throttle-body and intake manifold, Kooks 1 7/8” Long Tube Headers, Dynomax Bullet Cat-Back System, Skip Shift Eliminator

12-18-2013, 08:14 AM	#7
axis Search Ninja Drives: 2010 Black 2SS/RS A6 Join Date: Oct 2009 Location: Central Ark Posts: 7,183	Resonated X pipe will help a little but the only way to really silence it is to slap on some high flow cats. __________________ 2010 Black 2SS/RS A6 Halltech CF 102 fed GPI modded intake manifold Bo (knows) White ported TB Kooks LT's/ Dynomax VT Pfadted (springs/sways) Dyno tuned by Rhino and GPI I once parallel parked a train.

12-18-2013, 10:44 PM	#12
Camarodriver2 Drives: FOR SALE! Bumblebee 1 of 1 Join Date: May 2010 Location: Geneva IL Posts: 530 View My Garage	With your setup, if you remove the stock center resonator, you'll go from raspy sound to full-on DRONE. You may want to change out the mufflers for Magnaflow for a deeper sound. The stock exhaust was actually designed properly and we're trying to make them sound like modified race cars. Fun, but an expensive learning process.

12-18-2013, 11:55 PM	#14
Mint Drives: 2013 Camaro SS Join Date: Jan 2013 Location: Jersey Posts: 343 View My Garage	Thanks for the replies. Drone doesn't affect me much due to my lack of highway driving. What is getting me annoyed is the raspy tin can sound from the exhaust. It's not as bad as others say theirs is but it's there. I'm going to try swapping the stock resonator for the magnaflow one. See if it works.