Stock exhaust dB re Laguna Seca?

jdgamble · 08-19-2020, 05:58 PM

Hey all,

I'm trying to find experience with stock exhaust at Laguna Seca with the 90 dB limit. Lots of threads about modded exhaust and flap control, but I can't find anything on stock exhaust. Will I have trouble in Sport/Sport Plus with stock exhaust?

Thanks for any info.

NYG · 08-19-2020, 09:57 PM

If your exhaust is stock, don't even think twice about it.

Spun Crankhub · 08-20-2020, 12:37 AM

I think stock exhaust on sport + could potentially blow sound at Laguna.
I have catless dp's + AA mid + stock rear section, and I can run comfort or sport, and go flat out, but in Sport + I have to either let off or move to the left, the latter does not always work.

jdgamble · 08-20-2020, 12:46 AM

Cool thanks.

lookitsapples · 08-20-2020, 01:10 AM

I went completely stock and had no issues whatsoever with sport + at full throttle

drroc · 08-20-2020, 03:11 PM

Quote:

Originally Posted by Spun Crankhub

I think stock exhaust on sport + could potentially blow sound at Laguna.
I have catless dp's + AA mid + stock rear section, and I can run comfort or sport, and go flat out, but in Sport + I have to either let off or move to the left, the latter does not always work.

Stock exhaust on sport+ is fine. I have never had issues there.

NYG · 08-20-2020, 04:35 PM

Quote:

Originally Posted by Spun Crankhub

I think stock exhaust on sport + could potentially blow sound at Laguna.
I have catless dp's + AA mid + stock rear section, and I can run comfort or sport, and go flat out, but in Sport + I have to either let off or move to the left, the latter does not always work.

Def not.

M-Performance and CS Exhaust have never had a problem at Lime Rock Park (86db)

90db IS LOUD.

fanatic1 · 08-20-2020, 06:59 PM

Quote:

Originally Posted by NYG

Quote:

Originally Posted by Spun Crankhub

I think stock exhaust on sport + could potentially blow sound at Laguna.
I have catless dp's + AA mid + stock rear section, and I can run comfort or sport, and go flat out, but in Sport + I have to either let off or move to the left, the latter does not always work.

Def not.

M-Performance and CS Exhaust have never had a problem at Lime Rock Park (86db)

90db IS LOUD.

Quote:

Originally Posted by NYG

Quote:

Originally Posted by Spun Crankhub

I think stock exhaust on sport + could potentially blow sound at Laguna.
I have catless dp's + AA mid + stock rear section, and I can run comfort or sport, and go flat out, but in Sport + I have to either let off or move to the left, the latter does not always work.

Def not.

M-Performance and CS Exhaust have never had a problem at Lime Rock Park (86db)

90db IS LOUD.

Rub it in twin, Laguna Seca is brutal for sound. Ask me how I know.

It's comical seeing how much people invest in order to clear sound at Laguna. Porsche GT3 with GPS sensors to trigger exhaust valve closure etc.

icegrill · 08-20-2020, 07:13 PM

Don't flatter yourself, it's not a gt car

NYG · 08-20-2020, 08:34 PM

Quote:

Originally Posted by fanatic1

Rub it in twin, Laguna Seca is brutal for sound. Ask me how I know.

It's comical seeing how much people invest in order to clear sound at Laguna. Porsche GT3 with GPS sensors to trigger exhaust valve closure etc.

Your CS exhaust got flagged?!

jdgamble · 08-20-2020, 08:45 PM

Hey one more... do I need a tow hook at LS?

NYG · 08-20-2020, 08:59 PM

Quote:

Originally Posted by jdgamble

Hey one more... do I need a tow hook at LS?

Depends on what organization is hosting. Usually HPDE doesn't require it but a few highly recommend it.

You've got a tow hook in your trunk though.

jdgamble · 08-20-2020, 09:11 PM

Quote:

Originally Posted by NYG

Depends on what organization is hosting. Usually HPDE doesn't require it but a few highly recommend it.

You've got a tow hook in your trunk though.

Oh man. Haha. That’s awesome. I’m doing a hooked on driving event in the A group, so it should be pretty tame.

NYG · 08-20-2020, 09:12 PM

Quote:

Originally Posted by jdgamble

Oh man. Haha. That’s awesome. I’m doing a hooked on driving event in the A group, so it should be pretty tame.

HOD here doesn't require it!

fanatic1 · 08-21-2020, 01:14 AM

Quote:

Originally Posted by NYG

Your CS exhaust got flagged?!

MPE, which is awesome everywhere BUT Laguna

NYG · 08-21-2020, 12:25 PM

Quote:

Originally Posted by fanatic1

MPE, which is awesome everywhere BUT Laguna

No mid pipe or anything? Limerock is ridiculously strict too and even my buddies Camaro (way louder than me) never got flagged.

fanatic1 · 08-21-2020, 01:28 PM

never flagged with stock exhaust on 2016 M4, but MPE on CS been flagged almost every time until BMS controller.

its comical when running with GT3RS rigtht in front of you and all of a sudden at T5 - it goes quiet. Then right at T6, full song again and its massively loud again.

dvq · 08-21-2020, 04:56 PM

Stock downpipe MPE on M4 ZCP @ full wot just inches under the 103db restriction days, and gets flagged at 90, 91, and 93 db days.

fanatic1 · 08-21-2020, 05:45 PM

Quote:

Originally Posted by NYG

No mid pipe or anything? Limerock is ridiculously strict too and even my buddies Camaro (way louder than me) never got flagged.

No midpipe or anything - Lagunadiculous, but excited to go back.....

Spun Crankhub · 08-22-2020, 02:29 AM

Quote:

Originally Posted by jdgamble

Hey one more... do I need a tow hook at LS?

Smart bet is to equip at least the front. If you were to go off you definitely dont want to be rummaging through your trunk for a tow hook. Not to mention that the longer it takes to get you towed off the more of that session you could potentially be costing others.

bjorn///M · 08-22-2020, 07:56 AM

Other than BMS controller, anybody have laguna pipes? I wonder how much they cost

lookitsapples · 08-22-2020, 12:16 PM

Quote:

Originally Posted by bjorn///M

Other than BMS controller, anybody have laguna pipes? I wonder how much they cost

I haven't seen any f80's with laguna pipes. But I do know all the porsche/s2000 guys go here for them https://www.trackspecauto.com/laguna-pipes

08-19-2020, 05:58 PM	#1
jdgamble Captain 298 Rep 798 Posts Drives: 18 CQM M3 - My family car Join Date: Jun 2010 Location: Danville, CA iTrader: (0)	Stock exhaust dB re Laguna Seca? Hey all, I'm trying to find experience with stock exhaust at Laguna Seca with the 90 dB limit. Lots of threads about modded exhaust and flap control, but I can't find anything on stock exhaust. Will I have trouble in Sport/Sport Plus with stock exhaust? Thanks for any info. __________________ 18 CQM M3
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08-19-2020, 09:57 PM	#2
NYG Brigadier General 10744 Rep 3,690 Posts Drives: Audi R8 Join Date: Feb 2017 Location: Brooklyn, NY iTrader: (0)	If your exhaust is stock, don't even think twice about it.
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08-20-2020, 12:37 AM	#3
Spun Crankhub Major General 965 Rep 5,032 Posts Drives: 15 F82 SOLD Join Date: Feb 2012 Location: San Jose, CA iTrader: (63)	I think stock exhaust on sport + could potentially blow sound at Laguna. I have catless dp's + AA mid + stock rear section, and I can run comfort or sport, and go flat out, but in Sport + I have to either let off or move to the left, the latter does not always work.
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08-20-2020, 12:46 AM	#4
jdgamble Captain 298 Rep 798 Posts Drives: 18 CQM M3 - My family car Join Date: Jun 2010 Location: Danville, CA iTrader: (0)	Cool thanks.
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08-20-2020, 01:10 AM	#5
lookitsapples Private First Class 113 Rep 142 Posts Drives: 2016 m3 Join Date: Jan 2019 Location: San Jose, CA iTrader: (0)	I went completely stock and had no issues whatsoever with sport + at full throttle
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08-20-2020, 07:13 PM	#9
icegrill Lieutenant Colonel 2078 Rep 1,780 Posts Drives: 2015 M3 Join Date: Jan 2018 Location: Oregon iTrader: (3)	Don't flatter yourself, it's not a gt car
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08-20-2020, 08:45 PM	#11
jdgamble Captain 298 Rep 798 Posts Drives: 18 CQM M3 - My family car Join Date: Jun 2010 Location: Danville, CA iTrader: (0)	Hey one more... do I need a tow hook at LS?
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08-21-2020, 01:28 PM	#17
fanatic1 Captain 1019 Rep 859 Posts Drives: 2019 M4 CS Join Date: Sep 2010 Location: Encinitas/San Diego iTrader: (1) Garage List 2019 M4CS [0.00]	never flagged with stock exhaust on 2016 M4, but MPE on CS been flagged almost every time until BMS controller. its comical when running with GT3RS rigtht in front of you and all of a sudden at T5 - it goes quiet. Then right at T6, full song again and its massively loud again. Attached Images
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08-21-2020, 04:56 PM	#18
dvq First Lieutenant 319 Rep 317 Posts Drives: 2018 M4 Competition Join Date: Nov 2019 Location: Mountain View, CA iTrader: (1)	Stock downpipe MPE on M4 ZCP @ full wot just inches under the 103db restriction days, and gets flagged at 90, 91, and 93 db days.
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08-22-2020, 07:56 AM	#21
bjorn///M Private 121 Rep 88 Posts Drives: m2c Join Date: Jun 2018 Location: bay area iTrader: (0)	Other than BMS controller, anybody have laguna pipes? I wonder how much they cost __________________ Gone but not forgotten: e39 M5, e36 m3, 12 X5d, 14 328, 11 328, 08 328, 91 325i
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