More sound below 3k

Zl1+911 · 10-30-2021, 06:06 AM

In my pursuit for my car to have a sound that I love I am looking for ideas. Previously I was chasing more sound. However in deeper contemplation- what I am really looking for is more sound below 3k. Beyond 3k the Borla axel back does just fine.

What can I do to keep the initial cold start up sound around even when the car warms up? Why does it become so quite after its warm? Any ideas on increasing the base sound?

Thanks!

avalonandl · 10-30-2021, 06:21 AM

Cold start the ecm adds fuel so the catalysts light off. No real way to keep the richer mixture.

Zl1+911 · 10-30-2021, 09:02 AM

Make sense. But there must be exhaust hardware that adds more sound at idle and below 3k?

LT4Greg · 10-30-2021, 09:48 AM

Get some exhaust cutouts and you can leave them open when you want it louder than normal.

Zl1+911 · 10-30-2021, 10:17 AM

Quote:

Originally Posted by LT4Greg

Get some exhaust cutouts and you can leave them open when you want it louder than normal.

Thanks - like custom at a shop? Or buy something? Thanks

Zl1+911 · 10-30-2021, 10:34 AM

Investigating straight pipes more - found this. Looks like resonated and non resonated options from PLM. Any thoughts or feedback? Do straight pipes have drone (for those of u with them)

https://privatelabelmfg.com/products...35007618318474

avalonandl · 10-30-2021, 01:05 PM

Drone is bad with straight pipes. Plus annoying.

SJFGTO · 10-31-2021, 09:57 AM

Quote:

Originally Posted by avalonandl

Drone is bad with straight pipes. Plus annoying.

^^^Agreed^^^. I have heard several straight pipe set ups and the drone was very apparent. The sound itself was always loud but no tone, like a dump truck. I’d pass.

Camaro1973 · 10-31-2021, 10:43 AM

Quote:

Originally Posted by Zl1+911

In my pursuit for my car to have a sound that I love I am looking for ideas. Previously I was chasing more sound. However in deeper contemplation- what I am really looking for is more sound below 3k. Beyond 3k the Borla axel back does just fine.

What can I do to keep the initial cold start up sound around even when the car warms up? Why does it become so quite after its warm? Any ideas on increasing the base sound?

Thanks!

If you want more sound, do a secondary cat delete. Its going to increase the sound all over though.

arpad_m · 10-31-2021, 12:56 PM

Quote:

Originally Posted by Camaro1973

If you want more sound, do a secondary cat delete. Its going to increase the sound all over though.

^^^ This.

I have long tube headers with only primary cats, stock NPP exhaust and garage cold starts in sport mode now rival a minor earthquake. Inside the cabin, with windows up it's still muffled to a level that allows conversations with the missus or kids in the back. Win-win.

jvandy50 · 10-31-2021, 01:36 PM

I'd bet money your valves are closing...pull the fuse and see if you like it better

Zl1+911 · 10-31-2021, 04:27 PM

Fuse is already pulled

Camaro1973 · 10-31-2021, 06:33 PM

Quote:

Originally Posted by jvandy50

I'd bet money your valves are closing...pull the fuse and see if you like it better

Looks like you owe someone money

Zl1+911 · 10-31-2021, 06:37 PM

I do take PayPal

10-30-2021, 06:06 AM	#1
Zl1+911 Drives: 997 GTS, ZL1 A10, ZLEM6, ZLEA10 Join Date: Dec 2017 Location: NYC/NJ Posts: 631	More sound below 3k In my pursuit for my car to have a sound that I love I am looking for ideas. Previously I was chasing more sound. However in deeper contemplation- what I am really looking for is more sound below 3k. Beyond 3k the Borla axel back does just fine. What can I do to keep the initial cold start up sound around even when the car warms up? Why does it become so quite after its warm? Any ideas on increasing the base sound? Thanks!

10-30-2021, 06:21 AM	#2
avalonandl Drives: 2019 ZL-1 Join Date: Feb 2009 Location: Troy, MI & Naples, FL Posts: 2,018	Cold start the ecm adds fuel so the catalysts light off. No real way to keep the richer mixture. __________________ 2019 ZL-1 Acquired 4/23/21 at 6300 miles. Riverside Blue, A10, PDR. Traded in 2017 2SS with 6M and 32k miles. Continental Extreme Contact Sports. Now has 10,000 miles... 2012 Yukon XL Denali w/ 6.2 AWD

10-30-2021, 09:48 AM	#4
LT4Greg Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016 Location: Georgia Posts: 5,875	Get some exhaust cutouts and you can leave them open when you want it louder than normal. __________________ ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.

10-30-2021, 01:05 PM	#7
avalonandl Drives: 2019 ZL-1 Join Date: Feb 2009 Location: Troy, MI & Naples, FL Posts: 2,018	Drone is bad with straight pipes. Plus annoying. __________________ 2019 ZL-1 Acquired 4/23/21 at 6300 miles. Riverside Blue, A10, PDR. Traded in 2017 2SS with 6M and 32k miles. Continental Extreme Contact Sports. Now has 10,000 miles... 2012 Yukon XL Denali w/ 6.2 AWD

10-30-2021, 09:02 AM	#3
Zl1+911 Drives: 997 GTS, ZL1 A10, ZLEM6, ZLEA10 Join Date: Dec 2017 Location: NYC/NJ Posts: 631	Make sense. But there must be exhaust hardware that adds more sound at idle and below 3k?

10-30-2021, 10:34 AM	#6
Zl1+911 Drives: 997 GTS, ZL1 A10, ZLEM6, ZLEA10 Join Date: Dec 2017 Location: NYC/NJ Posts: 631	Investigating straight pipes more - found this. Looks like resonated and non resonated options from PLM. Any thoughts or feedback? Do straight pipes have drone (for those of u with them) https://privatelabelmfg.com/products...35007618318474

10-31-2021, 01:36 PM	#11
jvandy50 Drives: 18 ZL1-1LE, 10 JKU Join Date: Jul 2018 Location: AR Posts: 596	I'd bet money your valves are closing...pull the fuse and see if you like it better

10-31-2021, 04:27 PM	#12
Zl1+911 Drives: 997 GTS, ZL1 A10, ZLEM6, ZLEA10 Join Date: Dec 2017 Location: NYC/NJ Posts: 631	Fuse is already pulled

10-31-2021, 06:37 PM	#14
Zl1+911 Drives: 997 GTS, ZL1 A10, ZLEM6, ZLEA10 Join Date: Dec 2017 Location: NYC/NJ Posts: 631	I do take PayPal

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