94.8 decibels?

IH8WNTR · 01-03-2020, 09:15 AM

I was at laguna seca last weekend for a hpde and got dinged for being too loud. The exhaust is stock. I have to let off and shift early by the sound booth to keep driving without getting kicked off. What have you done to quiet down your exhaust? I was driving in track mode, but I don’t think that matters at WOT.

R3ctivision · 01-03-2020, 10:05 AM

You have to lift unfortunately. Or get exhaust mods to quiet it down further for LS. I blew 96.8 there once with my SS 1LE stock exhaust. Now that I have a ZLE with AWE I really have to figure something out..

kropscamaro16 · 01-03-2020, 11:34 AM

laguna pipes time? lol

mitdr774 · 01-03-2020, 01:49 PM

Some of the "Laguna Pipes" look like they are over the top just to make a statement.

kropscamaro16 · 01-03-2020, 01:52 PM

haha you mean like these? bozo bro!

oneplustwo · 01-03-2020, 05:04 PM

Did you try manually putting the exhaust in stealth mode? I had to do that because I blew sound at Sears. (No cats and a whipple make a lot of noise.)

TrackClub · 01-03-2020, 06:30 PM

Quote:

Originally Posted by oneplustwo

Did you try manually putting the exhaust in stealth mode? I had to do that because I blew sound at Sears. (No cats and a whipple make a lot of noise.)

The manual warns against running track in stealth mode. Just an fyi.

IH8WNTR · 01-03-2020, 06:33 PM

I set the npp to tour and then just let off and short shifted up the hill in 4th. Wish I knew how high I could rev in 3rd before it hits 90 dB.

Rodan · 01-03-2020, 08:10 PM

Running the exhaust in other than track mode is not a good idea...

Not my pic, but from another thread here on the subject:

I have the same problem with a 95dB local track, and have not yet found a solution.

Og Neon · 01-03-2020, 09:00 PM

Quote:

Originally Posted by Rodan

Running the exhaust in other than track mode is not a good idea...

Not my pic, but from another thread here on the subject:

I have the same problem with a 95dB local track, and have not yet found a solution.

I believe the story with that one is he modded his to stay shut in stealth mode. Stealth mode stock will still open up at a WOT to prevent too much back pressure. This guy over rode that somehow and blew up his muffler.

Og Neon · 01-03-2020, 09:06 PM

I took a page out of the Z06 guys I ran with in Az and made up two different designs that I can quickly install giving me two different levels of sound reduction depending on what I need. Here is one of the designs installed that give me a minimal redux in sound. I don't have pictures of the other set, but they go straight out as an insert with some sound baffling material inside.

TrackClub · 01-03-2020, 11:13 PM

Quote:

Originally Posted by Og Neon

I believe the story with that one is he modded his to stay shut in stealth mode. Stealth mode stock will still open up at a WOT to prevent too much back pressure. This guy over rode that somehow and blew up his muffler.

Well, GM specifically warns about NOT running it WOT in Stealth, so i suspect it is a bit more complex in terms of possible outcomes. Either way, other solutions exist to deal with the problem.

rickybobby · 01-04-2020, 12:52 AM

I had some simple Laguna pipes made and have no problems at even 90 DB days now.

Rodan · 01-04-2020, 06:55 AM

Quote:

Originally Posted by rickybobby

I had some simple Laguna pipes made and have no problems at even 90 DB days now.

Please post pics of your setup.

01-03-2020, 09:15 AM	#1
IH8WNTR Drives: 2017 1SS 1LE Silver Ice Metallic Join Date: Jun 2016 Location: Anywhere and everywhere Posts: 258	94.8 decibels? I was at laguna seca last weekend for a hpde and got dinged for being too loud. The exhaust is stock. I have to let off and shift early by the sound booth to keep driving without getting kicked off. What have you done to quiet down your exhaust? I was driving in track mode, but I don’t think that matters at WOT.

01-03-2020, 10:05 AM	#2
R3ctivision 1LE Convert Drives: 2018 ZLE Join Date: Apr 2017 Location: Mountain View, CA Posts: 369	You have to lift unfortunately. Or get exhaust mods to quiet it down further for LS. I blew 96.8 there once with my SS 1LE stock exhaust. Now that I have a ZLE with AWE I really have to figure something out.. __________________ 2016 Porsche 911 GTS (Racing Yellow) 2002 BMW Spec E46 race car (Lizard Green) Previous cars: - 2018 Camaro ZL1 1LE (Red Hot) - 2018 Miata RF GT (Machine Gray/Auburn) - 2017 Camaro 1SS 1LE (Summit White) - 2008 BMW 135i (Montego Blue) - 1996 BMW 328i (Arctic Silver)

01-03-2020, 11:34 AM	#3
kropscamaro16 Drives: 2016 1ss camaro Join Date: Feb 2016 Location: 909 Posts: 10,134	laguna pipes time? lol __________________ 16 1SS NIGHTFALL GRAY METALLIC WITH NPP #BECAUSERACECAR #SAVETHEMANUALS

01-03-2020, 01:52 PM	#5
kropscamaro16 Drives: 2016 1ss camaro Join Date: Feb 2016 Location: 909 Posts: 10,134	haha you mean like these? bozo bro! __________________ 16 1SS NIGHTFALL GRAY METALLIC WITH NPP #BECAUSERACECAR #SAVETHEMANUALS

01-03-2020, 05:04 PM	#6
oneplustwo Drives: 2018 Torch Red SS 1LE with Whipple Join Date: Jul 2018 Location: San Francisco Posts: 168	Did you try manually putting the exhaust in stealth mode? I had to do that because I blew sound at Sears. (No cats and a whipple make a lot of noise.) __________________ 2018 Torch Red SS 1LE, Whipple supercharger, custom tune, Rotofab CAI, ZL1 duckbill spoiler

01-03-2020, 01:49 PM	#4
mitdr774 Drives: 2020 Chevrolet Camaro 1SS Join Date: Sep 2019 Location: Michigan Posts: 28	Some of the "Laguna Pipes" look like they are over the top just to make a statement.

01-03-2020, 06:33 PM	#8
IH8WNTR Drives: 2017 1SS 1LE Silver Ice Metallic Join Date: Jun 2016 Location: Anywhere and everywhere Posts: 258	I set the npp to tour and then just let off and short shifted up the hill in 4th. Wish I knew how high I could rev in 3rd before it hits 90 dB.

01-03-2020, 08:10 PM	#9
Rodan Drives: 2018 ZL1 coupe Join Date: Nov 2018 Location: Prescott, Arizona Posts: 589	Running the exhaust in other than track mode is not a good idea... Not my pic, but from another thread here on the subject: I have the same problem with a 95dB local track, and have not yet found a solution.

01-03-2020, 09:06 PM	#11
Og Neon Lover of Speed Drives: 2018 ZLE Join Date: Feb 2016 Location: Phoenix Posts: 274	I took a page out of the Z06 guys I ran with in Az and made up two different designs that I can quickly install giving me two different levels of sound reduction depending on what I need. Here is one of the designs installed that give me a minimal redux in sound. I don't have pictures of the other set, but they go straight out as an insert with some sound baffling material inside. __________________ Killer Whale Racing 2021 One Lap of America Track Videos 2019 One Lap of America Track Videos 2017 One Lap of America Track Videos 2022 Ram TRX 2018 Camaro ZL1 1LE 2020 Range Rover Sport SVR (Sold) 2014 Grand Cherokee SRT (Sold) 2014 Camaro Z/28 (Sold)

01-04-2020, 12:52 AM	#13
rickybobby Drives: BMW M3, ZL1 1LE Join Date: Mar 2019 Location: California Posts: 103	I had some simple Laguna pipes made and have no problems at even 90 DB days now.

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