Exhaust Note

Sham001 · 12-23-2016, 06:06 PM

Greetings,

Perhaps this is a dumb question, but I am not sure why my car's Exhaust sounds lesser deeper as I drive more and more miles non-stop, Is that because of the Engine or perhaps the Mufflers?
Curios to know if this is only me and my Car or its something that's common....

Thanks....

enzia35 · 12-23-2016, 07:06 PM

Carbon build up?

SomeGeoffGuy · 12-23-2016, 08:43 PM

I see you have a Borla. I am not sure what is inside of them, but if they have fiberglass then sometimes the tone will change as they "bake" in. Also, I think that you just get more used to it. The stock stuff has nothing but air and pipes in the mufflers, so they stay pretty consistent. The only difference you might here is between hot and cold start.

-Geoff

Megahurtz · 12-24-2016, 12:03 AM

I noticed my Borla S-Type seems to have gotten slightly quieter. However, my logic says its more likely I've just gotten used to it rather than it actually getting quieter.

1LE caSSper · 12-24-2016, 11:02 AM

Yes I know from motorcycles & superbikes aftermarket exhaust that are fiberglass "bake" settle in & break in and the exhaust note will change over the 1st 1,000 or few k miles as it heats up / heart cycles

bybcous · 12-24-2016, 11:14 AM

My NPP has quieted down alot, even with headers, im thinking of getting something else now.

Sham001 · 12-24-2016, 06:56 PM

Quote:

Originally Posted by SomeGeoffGuy

I see you have a Borla. I am not sure what is inside of them, but if they have fiberglass then sometimes the tone will change as they "bake" in. Also, I think that you just get more used to it. The stock stuff has nothing but air and pipes in the mufflers, so they stay pretty consistent. The only difference you might here is between hot and cold start.

-Geoff

I Don't clearly remember but I think I had this issue with the Stock Muffler as well, Definitely after revving 2-3 times while the car was in stand still, the tone used to get less and less deeper....

Thanks...

JFM-jr · 12-26-2016, 07:34 AM

Im not sure if your talking about it quieting down over the life span mileage since install or quieting down over the course of an individual driving cycle. If its the latter then I can say the NPP valves even in Track mode will modulate and change depending on speed. Its definatley quieter at 60mph cruising then it is even gently accelerating from a traffic light.

KILLA BEE · 12-26-2016, 10:21 AM

Quote:

Originally Posted by JFM-jr

Im not sure if your talking about it quieting down over the life span mileage since install or quieting down over the course of an individual driving cycle. If its the latter then I can say the NPP valves even in Track mode will modulate and change depending on speed. Its definatley quieter at 60mph cruising then it is even gently accelerating from a traffic light.

It should get louder the more they bake in. MINE definitely did in regards to the secondary cat delete straight pipes even my wife noticed after they were on a couple months.

12-23-2016, 06:06 PM	#1
Sham001 PushRodLT1 Drives: M1SS1LE Join Date: Jul 2016 Location: New Jersey Posts: 185	Exhaust Note Greetings, Perhaps this is a dumb question, but I am not sure why my car's Exhaust sounds lesser deeper as I drive more and more miles non-stop, Is that because of the Engine or perhaps the Mufflers? Curios to know if this is only me and my Car or its something that's common.... Thanks.... __________________ 2SS Black, M6, NPP, MRC Mods: Borla ATAK Axleback w/NPP, Roto-Fab CAI, RPI Designs Splitter, ACS Spoiler, Michelin PS4S Tires.

12-23-2016, 07:06 PM	#2
enzia35 Drives: '16 Garnet Red 1SS Join Date: Mar 2014 Location: College Station, TX Posts: 3,449	Carbon build up? __________________ '16 Camaro 1SS '18 Miata GT Gone: '01 Camaro, '14 Camaro, '90 Miata

12-23-2016, 08:43 PM	#3
SomeGeoffGuy Drives: 2023 2SS Convertible Join Date: May 2009 Location: Metro Detroit Posts: 1,202	I see you have a Borla. I am not sure what is inside of them, but if they have fiberglass then sometimes the tone will change as they "bake" in. Also, I think that you just get more used to it. The stock stuff has nothing but air and pipes in the mufflers, so they stay pretty consistent. The only difference you might here is between hot and cold start. -Geoff __________________ '12 2SS RS Convertible - Traded in. '16 2SS Convertible - White on white, mag-ride, NPP, nav. Sold! '23 2SS Convertible -Same as above except orange.

12-24-2016, 11:14 AM	#6
bybcous Drives: 2016 Hyper Blue 1SS Join Date: Jul 2015 Location: hampton roads Posts: 2,763	My NPP has quieted down alot, even with headers, im thinking of getting something else now. __________________ 1ss/Auto-Hyper Blue acs carbon flash spoiler, bmr springs, gm clear tails. Texas speed cam, 223/227 .635/.635 116 LSA, Kooks Long Tube Headers with green cats, MSD Atomic Air Force Intake, CAI Cold Air Intake, QTP cutouts. 503 hp Best so far 11.5 at 123 with a 1.83 60ft. BMR lower and upper trailing arms and upper control arms,E85 DELIVERED 12/29/15 http://youtube.com/bybcous " no talking only racing on my youtube"

12-26-2016, 07:34 AM	#8
JFM-jr Drives: 2016 Camaro 2SS Join Date: Mar 2016 Location: Suffolk Long Island Posts: 954	Im not sure if your talking about it quieting down over the life span mileage since install or quieting down over the course of an individual driving cycle. If its the latter then I can say the NPP valves even in Track mode will modulate and change depending on speed. Its definatley quieter at 60mph cruising then it is even gently accelerating from a traffic light. __________________ 2016 Hyper Blue 2SS A8,NPP,Moonroof Pray ported factory intake manifold Ported TB Rotofab ARH 1 7/8 longtubes hi flow cats AFM deleted E85 11.0@124.9 11.65@118.8 pump gas,stock tune/exhaust New combo: Pray Performance Heads/cam MSD intake manifold and Circle D 3C 554/491 on E85 all work & tuning done by Pray

12-24-2016, 12:03 AM	#4
Megahurtz Snackbar Tuning Drives: 2023 SGM ZL1 Join Date: Oct 2016 Location: Florida Posts: 1,522	I noticed my Borla S-Type seems to have gotten slightly quieter. However, my logic says its more likely I've just gotten used to it rather than it actually getting quieter.

12-24-2016, 11:02 AM	#5
1LE caSSper Drives: White 1LE Join Date: Dec 2016 Location: Chicago Posts: 216	Yes I know from motorcycles & superbikes aftermarket exhaust that are fiberglass "bake" settle in & break in and the exhaust note will change over the 1st 1,000 or few k miles as it heats up / heart cycles

User Name		Remember Me?
Password