101 db. limit at Sonoma question - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Bugslayer · 07-19-2017, 01:47 PM

Question is will I make it?
I've got a 2015 ZL1 with Kooks long tube headers, no cats and then stock exhaust from there. Usually go to Miller for track days, so never had to worry about it.
Anybody go there with a similar set up?
Thanks for the help.

Jazzzed · 07-19-2017, 03:32 PM

At which point is the measurement taken... at idle, or when you're full bore with the pedal to the floor? 100db isn't that loud really. Concerts are around 110db, and a regular car driving down the road has around 80db of road noise inside the car. At 100db, you can have conversation with the person next to you, although you might have to lean in and talk a little loud.

EDIT: Also, you can probably get a free SPL meter app for your phone which will measure it using the phone's microphone. It may not be extremely accurate, but close enough for what you're doing probably.

Bugslayer · 07-20-2017, 08:23 AM

Thanks for the input. I have not been to this track before, so not too sure on where they test, but I'm sure it will be out on the track somewhere.

Hoping someone with first hand knowledge chimes in.

Olddudesrule · 07-20-2017, 09:29 AM

Not sure about that track, but around here, on the tracks that test, they usually seem to do it at two locations. With only one, we learn to let off the gas just prior to try to minimize the noise level. My car is similarly equipped, and on throttle, I don't think I would quite make that cut off....

silverbullet415 · 07-23-2017, 11:16 PM

You should be fine I set off 98db at laguna seca with same mods

CamaroDreams76 · 07-24-2017, 02:11 AM

My car got 98db at WOT at an autocross event. I have NPP and solo high flow cats. So the LTs are going to be pretty close. Maybe you want to invest in a 3 way controller for your ZL1 so you can close the baffles and cut off a few DB.

Crash76 · 07-24-2017, 05:57 PM

I was 111db with kooks LTs, cam, off road pipes and open npp

If you are high in the revs when you pass the sound check (it is the 1/4mi tree on the track) on the straight to turn one, you will blow the sound check

07-19-2017, 01:47 PM	#1
Bugslayer Drives: ZL1 Join Date: Dec 2015 Location: Boise Posts: 11	101 db. limit at Sonoma question Question is will I make it? I've got a 2015 ZL1 with Kooks long tube headers, no cats and then stock exhaust from there. Usually go to Miller for track days, so never had to worry about it. Anybody go there with a similar set up? Thanks for the help.

07-19-2017, 03:32 PM	#2
Jazzzed Drives: 2015 Camaro LT Join Date: Sep 2016 Location: Fox Lake, IL Posts: 393	At which point is the measurement taken... at idle, or when you're full bore with the pedal to the floor? 100db isn't that loud really. Concerts are around 110db, and a regular car driving down the road has around 80db of road noise inside the car. At 100db, you can have conversation with the person next to you, although you might have to lean in and talk a little loud. EDIT: Also, you can probably get a free SPL meter app for your phone which will measure it using the phone's microphone. It may not be extremely accurate, but close enough for what you're doing probably. __________________

07-20-2017, 09:29 AM	#4
Olddudesrule Resident nomad Drives: 2014 Summit White 1SS/1LE Join Date: Nov 2015 Location: Gilbert, AZ Posts: 1,765	Not sure about that track, but around here, on the tracks that test, they usually seem to do it at two locations. With only one, we learn to let off the gas just prior to try to minimize the noise level. My car is similarly equipped, and on throttle, I don't think I would quite make that cut off.... __________________ Sold: 2007 Z06 2002 Viper GTS/ACR 2003 Z06 1965 FFR Cobra 2012 Nissan 370Z ADM LSA Stage II, Roto-Fab CAI, Kooks LTH/HFC's, Phastek CC, ported TB, Mishimoto radiator and oil cooler, BC Racing ER Series CO's, JPSS 32mm Black Magic rear bar, JPSS front inserts, R1 Concepts Premier slotted rotors/Goodrich SS lines, Schroth ASM harness, MGW flatstick, Brey-Krause HB, Tuned by NicD, at Cordes Performance Racing.

07-24-2017, 02:11 AM	#6
CamaroDreams76 Tri-County Camaro SWFL Drives: 2013 IOM 2SS/RS/1LE Join Date: Apr 2013 Location: South West FL Posts: 3,083 View My Garage	My car got 98db at WOT at an autocross event. I have NPP and solo high flow cats. So the LTs are going to be pretty close. Maybe you want to invest in a 3 way controller for your ZL1 so you can close the baffles and cut off a few DB. __________________ Just bolt ons........ https://www.camaro5.com/forums/showthread.php?t=343023

07-20-2017, 08:23 AM	#3
Bugslayer Drives: ZL1 Join Date: Dec 2015 Location: Boise Posts: 11	Thanks for the input. I have not been to this track before, so not too sure on where they test, but I'm sure it will be out on the track somewhere. Hoping someone with first hand knowledge chimes in.

07-23-2017, 11:16 PM	#5
silverbullet415 Drives: 2018 Camaro ZL1 1LE Join Date: Apr 2015 Location: Half Moon Bay Posts: 229	You should be fine I set off 98db at laguna seca with same mods

07-24-2017, 05:57 PM	#7
Crash76 Team 913 Drives: '14 ZL1, '15 Jeep GC, ‘22 Ram 2500 Join Date: Apr 2015 Location: USA, Central CA Posts: 1,119	I was 111db with kooks LTs, cam, off road pipes and open npp If you are high in the revs when you pass the sound check (it is the 1/4mi tree on the track) on the straight to turn one, you will blow the sound check