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

Walsh2011 · 01-09-2017, 09:44 PM

I just installed a full exhaust system on my 2010 SS L99. I'm running 2" x 3" Kooks Headers, Off-Road Connection Pipes into a 3" Corsa ZL1 catback.

Whenever I give it moderate throttle (just over 2k rpms) I get an extremely raspy sound. To me it sounds cheap and ricey, almost like the mufflers are metal trash cans being beaten on. I'm wondering what would I can do to eliminate this rasp. Thanks!

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Gunmetal Speedster · 01-09-2017, 09:50 PM

Well Corsa is known to be raspy. Some people love it, some hate it. I personally think it sounds good. Unfortunately, there isn't going to be much you can do. Your catless mid pipes are another source of rasp. Hi flows tend to help produce a deeper note than catless mid pipes. But even swapping them out, running a corsa catback you're still gonna have a raspy tone. Not much you're going to be able to do unless you switch catbacks

Spec · 01-09-2017, 09:51 PM

Add a set of flowmaster mufflers. Lesser decibel level overall... gone is any 'raspy'ness, nice deep sound yet not quite waking the dead.

I live in CA in an apt. complex. Its all the perfect balance for me.

BubbaSS · 01-09-2017, 10:49 PM

Too bad because thats a pricey catback...Sounds like you prefer more of a tuned exhaust note like me. You're gonna have to replace those off road pipes with something to reduce the rasp. I would recommend either replacing the pipes with chambered mufflers or at least replacing the x-pipe with a resonated pipe. Adding 16" chambered mufflers would work well I think.

Gunmetal Speedster · 01-10-2017, 03:56 AM

Quote:

Originally Posted by BubbaSS

Too bad because thats a pricey catback...Sounds like you prefer more of a tuned exhaust note like me. You're gonna have to replace those off road pipes with something to reduce the rasp. I would recommend either replacing the pipes with chambered mufflers or at least replacing the x-pipe with a resonated pipe. Adding 16" chambered mufflers would work well I think.

Bubba is right. They are one of more pricey catbacks. But that also works in your favor, as the resale should be pretty easy if you list it at a good price. Get in touch with some vendors on here (RDP, JDP, Maryland Speed are a few) and see what they recommend for your set up. They can get you a good deal on your new system for the price you get for your old system, assuming you choose to go that route.

Out of curiosity, what Corsa system do you have?

Walsh2011 · 01-10-2017, 11:27 AM

Out of curiosity, what Corsa system do you have?[/QUOTE]

It's the 3" system made for the ZL1. I wanted quad tips so that's why I went with it. Part number 14971.

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JWade · 01-10-2017, 02:16 PM

I would try hi flo cats first. My lt headers and mbrp 3 in set up is pretty tame under normal driving. High flow cats are probably the main difference and could be a fairly easy fix for you.

cpais · 01-10-2017, 03:22 PM

I hate the raspy sounding exhausts, I hope you get it sorted out.

flipstyledsm22 · 01-10-2017, 03:47 PM

Forced induction (twin snails), if you don't want to change the pipes... otherwise, you'll just have to sell the exhaust system (or possibly trade someone for a tamer system... but I guess that's easier said than done where you're from).

flipstyledsm22 · 01-10-2017, 03:50 PM

Quote:

Originally Posted by flipstyledsm22

Forced induction (twin snails), if you don't want to change the pipes... otherwise, you'll just have to sell the exhaust system (or possibly trade someone for a tamer system... but I guess that's easier said than done where you're from).

^^^LMFAO... I thought your avatar said India!

Gunmetal Speedster · 01-10-2017, 07:34 PM

Quote:

Originally Posted by flipstyledsm22

^^^LMFAO... I thought your avatar said India!

I've read it multiple times and I swear it said that as well

you're not alone

JT58 · 01-11-2017, 07:01 AM

Harmonics play a huge part in exhaust sound. Pipes, the size of them and mufflers control the sound. A recent example on my 2016 Miata I installed an axle back from Goodwin Racing. The muffler had a smallish 2.5" tip. I cut it and welded on a dual tip, two 3" outlets. That changed the sound completely- it sounded ricey like a bumble bee. Just that one change changed the sound of the exhaust. I went back to a single tip.

The only suggestion I would offer in your case is to make sure first you have no leaks and if you don't change the mufflers. I have FLowmasters on mine and just love the sound- no rasp, deep and throaty with a little popping on deceleration off the gas.

xrivera91 · 01-11-2017, 08:16 AM

Should have gone with a borla! Love the sound of the atak on mine.

ThisGuyDrives · 01-11-2017, 08:59 AM

Quote:

Originally Posted by xrivera91

Should have gone with a borla! Love the sound of the atak on mine.

Worth every penny!

https://youtu.be/dNZfp0i1ZAY

01-09-2017, 09:44 PM	#1
Walsh2011 Drives: 2010 Camaro 2SS/RS Join Date: Dec 2015 Location: Peru, Indiana Posts: 114	Exhaust Too Raspy I just installed a full exhaust system on my 2010 SS L99. I'm running 2" x 3" Kooks Headers, Off-Road Connection Pipes into a 3" Corsa ZL1 catback. Whenever I give it moderate throttle (just over 2k rpms) I get an extremely raspy sound. To me it sounds cheap and ricey, almost like the mufflers are metal trash cans being beaten on. I'm wondering what would I can do to eliminate this rasp. Thanks! Sent from my iPhone using Tapatalk __________________ Yes, I am 18. Yes, I drive an SS. No, my parents did NOT pay for it.

01-09-2017, 09:50 PM	#2
Gunmetal Speedster Drives: Savitar; The 500rwhp N/A Monster! Join Date: Aug 2016 Location: Middletown, Ohio Posts: 2,914 View My Garage	Well Corsa is known to be raspy. Some people love it, some hate it. I personally think it sounds good. Unfortunately, there isn't going to be much you can do. Your catless mid pipes are another source of rasp. Hi flows tend to help produce a deeper note than catless mid pipes. But even swapping them out, running a corsa catback you're still gonna have a raspy tone. Not much you're going to be able to do unless you switch catbacks __________________ **SOLD504HP/433**TQ \| Night Fury cammed • Cold Air Inductions intake • Bo White ported TB • Speed Engineering 1 7/8 longtubes • NPP catback • QTP low profile cutouts • Powerbond 25% UDP • 3.73 gears • JRE scoop • ZL1 grille • R1 Concepts drilled/slotted rotors • built/tuned by Weapon X Motorsports Instagram \| YouTube \| Build Thread

01-09-2017, 10:49 PM	#4
BubbaSS WHAT RED LIGHT?! Drives: 2011 Black Camaro 2SS/RS M6 Join Date: Apr 2011 Location: Miami, Florida Posts: 1,115	Too bad because thats a pricey catback...Sounds like you prefer more of a tuned exhaust note like me. You're gonna have to replace those off road pipes with something to reduce the rasp. I would recommend either replacing the pipes with chambered mufflers or at least replacing the x-pipe with a resonated pipe. Adding 16" chambered mufflers would work well I think. __________________ 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

01-10-2017, 11:27 AM	#6
Walsh2011 Drives: 2010 Camaro 2SS/RS Join Date: Dec 2015 Location: Peru, Indiana Posts: 114	Out of curiosity, what Corsa system do you have?[/QUOTE] It's the 3" system made for the ZL1. I wanted quad tips so that's why I went with it. Part number 14971. Sent from my iPhone using Tapatalk __________________ Yes, I am 18. Yes, I drive an SS. No, my parents did NOT pay for it.

01-10-2017, 02:16 PM	#7
JWade Drives: 2014 Camaro SS/RS, L99 Join Date: Feb 2011 Location: Katy, Texas Posts: 37	I would try hi flo cats first. My lt headers and mbrp 3 in set up is pretty tame under normal driving. High flow cats are probably the main difference and could be a fairly easy fix for you. __________________ 2014 Camaro SS, L99 MBRP catback, CAI cai, Stainless Power LTs HFCs, tuned by KP Racing, Rohana RC7's, Z28 spoiler.

01-09-2017, 09:51 PM	#3
Spec Account Suspended Drives: 2010 Camaro 1SS LS3 Join Date: Jan 2015 Location: Riverside, CA Posts: 4,018	Add a set of flowmaster mufflers. Lesser decibel level overall... gone is any 'raspy'ness, nice deep sound yet not quite waking the dead. I live in CA in an apt. complex. Its all the perfect balance for me.

01-10-2017, 03:22 PM	#8
cpais Drives: camaro, corvette Join Date: Jan 2017 Location: local Posts: 9	I hate the raspy sounding exhausts, I hope you get it sorted out.

01-10-2017, 03:47 PM	#9
flipstyledsm22 Let's go fishing! Drives: a car with 8 cylinders Join Date: Apr 2016 Location: Seabrook, Texas Posts: 1,129 View My Garage	Forced induction (twin snails), if you don't want to change the pipes... otherwise, you'll just have to sell the exhaust system (or possibly trade someone for a tamer system... but I guess that's easier said than done where you're from). __________________ "When choosing between two evils, I always like to try the one I’ve never tried before." Mae West 1892-1980

01-11-2017, 07:01 AM	#12
JT58 Drives: Former 2016 Camaro 1LT Join Date: Jan 2017 Location: Naples, FL Posts: 760	Harmonics play a huge part in exhaust sound. Pipes, the size of them and mufflers control the sound. A recent example on my 2016 Miata I installed an axle back from Goodwin Racing. The muffler had a smallish 2.5" tip. I cut it and welded on a dual tip, two 3" outlets. That changed the sound completely- it sounded ricey like a bumble bee. Just that one change changed the sound of the exhaust. I went back to a single tip. The only suggestion I would offer in your case is to make sure first you have no leaks and if you don't change the mufflers. I have FLowmasters on mine and just love the sound- no rasp, deep and throaty with a little popping on deceleration off the gas.

01-11-2017, 08:16 AM	#13
xrivera91 Drives: 2015 Camaro 2ss Join Date: Apr 2015 Location: 07002 Posts: 1,165 View My Garage	Should have gone with a borla! Love the sound of the atak on mine.