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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 06-25-2013, 01:16 PM   #1
njweatherman
 
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Why does my exhaust quiet down?

I have a 2013 2ss automatic Camaro with the following mods:
flowmaster catback outlaw exhaust
k&n tyhpoon cold air intake
Range AFM disabling product

When I step on the gas, my car sounds nice and loud; however, when I do not have my foot on the gas, the exhaust sounds noticeably quieter.
Is there a way to increase the sound of the exhaust when I do not have my foot on the accelerator?
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Old 06-25-2013, 01:35 PM   #2
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Well this is how I see it. The exhaust slows down during idle. When you speed the motor up the exhaust speeds up and the mufflers do not have time to absorb the sound, thus allowing more sound to pass by. Less muffler will allow more sound. I have Corsa exhaust and after the mods it was pretty loud all the time. I installed a Magnaflow muffler to the pipes in the tunnel. During idle it is very quiet, but during acceleration it comes alive.
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Last edited by patternpilot; 06-25-2013 at 01:43 PM. Reason: wrong word
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Old 06-25-2013, 02:00 PM   #3
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Are you referring to active fuel management (AFM)?

This is when your engine switches into 4 cylinder mode.
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Old 06-25-2013, 02:17 PM   #4
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Umm if you're not giving the car gas it won't get louder. It's basic car knowledge.
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Old 06-25-2013, 02:30 PM   #5
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The volume and velocity of the exhaust gases slow down so there is less sound. Kind of like when you blow a whistle harder or softer.
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Old 06-25-2013, 02:44 PM   #6
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Quote:
Originally Posted by mikeyg36 View Post
Umm if you're not giving the car gas it won't get louder. It's basic car knowledge.
this

if your not on the gas, your not making power...therefor no sound
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Old 06-25-2013, 02:46 PM   #7
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Quote:
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The volume and velocity of the exhaust gases slow down so there is less sound. Kind of like when you blow a whistle harder or softer.
And you can think of it in terms of RPMs. Blow the whistle once every 10 seconds, or blow the whistle every second. A lot more noise.

You need to read up on exhuast before you go modding. Headers, cats, mid pipes/resonator, and mufflers all effect the sound. (tips do too, but not much).

An intake can change the tone as well
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Old 06-25-2013, 02:57 PM   #8
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Exhaust not as loud when you're off the gas pedal? Who'd have thunk it?
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Old 06-25-2013, 03:06 PM   #9
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That's cause your using a low flow K&N hotair kit!
Switch to a highflow Cold air kit like CAI, ADM, rotofab and it will make your car louder even at idle!


Oh and the "range won't help you" Tune it.
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Old 06-25-2013, 03:33 PM   #10
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Thanks for the input guys. I just remember my previous 2001 Mustang GT was always loud, even at idle and when I did not have my foot on the gas pedal.
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Old 06-25-2013, 03:58 PM   #11
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Quote:
Originally Posted by litle88 View Post
That's cause your using a low flow K&N hotair kit!
Switch to a highflow Cold air kit like CAI, ADM, rotofab and it will make your car louder even at idle!


Oh and the "range won't help you" Tune it.
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Old 06-25-2013, 04:30 PM   #12
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If its manual ... Just push the clutch down use the handbrake and keep your foot on the gas, I think that will work.
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Old 06-25-2013, 04:50 PM   #13
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Quote:
Originally Posted by njweatherman View Post
I have a 2013 2ss automatic Camaro with the following mods:
flowmaster catback outlaw exhaust
k&n tyhpoon cold air intake
Range AFM disabling product

When I step on the gas, my car sounds nice and loud; however, when I do not have my foot on the gas, the exhaust sounds noticeably quieter.
Is there a way to increase the sound of the exhaust when I do not have my foot on the accelerator?
You have to be kidding...
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Old 06-25-2013, 05:02 PM   #14
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Quote:
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Oh and the "range won't help you" Tune it.
Sorry, but the Range does help those not wanting a tune. It works, enough said.
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Old 06-25-2013, 05:12 PM   #15
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You have to be kidding...
Lol
or keep it in 1st gear and never shift it unless necessary lol.
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Old 06-25-2013, 05:33 PM   #16
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Old 06-25-2013, 05:34 PM   #17
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Quote:
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Lol
or keep it in 1st gear and never shift it unless necessary lol.
Why am I only getting 2mpg?!?
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Old 06-25-2013, 05:34 PM   #18
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really?
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Old 06-25-2013, 05:55 PM   #19
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Quote:
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If its manual ... Just push the clutch down use the handbrake and keep your foot on the gas, I think that will work.
Hey Garrison I think this guy can use a long throw shifter
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Old 06-25-2013, 05:57 PM   #20
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I love mine not to loud at idle but your ears will bleed at WOT.
Now I which cold start was not that loud or I should say the neighbors .
5:30 AM
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Old 06-25-2013, 06:01 PM   #21
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I see the op is an automatic. That's even better because he won't have to use the handbrake. Slip it into neutral and stay on the gas. FTMFW
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Old 06-25-2013, 07:16 PM   #22
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OP. Cutouts.
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Old 06-25-2013, 07:17 PM   #23
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Whistle tips FTW. You'll hear it ALL the time.
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Old 06-25-2013, 07:28 PM   #24
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It goes "Woop Wooooop!" You know what i'm sayin?
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Old 06-26-2013, 10:55 AM   #25
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You have a 2013. Do you have the dual exhaust mode? If so, those annoying little flaps control how loud your exhaust is at times.

It takes 5 mins to do the fuse pull to always keep them open.
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