12-01-2020, 05:44 PM | #1 |
Drives: 2023 ZL1 Convertible Join Date: Jan 2009
Location: GTA
Posts: 181
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Is Stealth Mode Available in the LT1 Trim with NPP?
Hey guys, question for all, I am looking at an LT1 trim camaro with the NPP exhaust.
Is the "stealth" mode available under the touch screen? As many others, I do not want to upset the neighbours at 5AM Or is this a SS thing only? Cheers, Jason
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2022 Equinox RS
2023 Trailblazer RS 2023 ZL1 Convertible |
12-01-2020, 06:10 PM | #2 |
Theoren Hanks
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Any Camaro with the NPP option should include all 4 of the exhaust modes (stealth, tour, sport and track). Either tied to drive mode or changed through the settings on the screen
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12-01-2020, 06:13 PM | #3 |
Drives: 2023 ZL1 Convertible Join Date: Jan 2009
Location: GTA
Posts: 181
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Thank you for the info......It would actually be a deal breaker for me if it did not have it in the LT1 trim......too many houses close together where I live and it would echo and reverberate everywhere...lol
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2022 Equinox RS
2023 Trailblazer RS 2023 ZL1 Convertible |
12-01-2020, 06:28 PM | #4 |
Drives: 2021 Camaro LT1 Join Date: Sep 2020
Location: Tampa FL area
Posts: 783
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I don't have track mode on my 2021 LT1. Even with mine set to sport is it no loud while just driving thru the hood at normal speed.
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12-01-2020, 06:29 PM | #5 |
Drives: 2023 ZL1 Convertible Join Date: Jan 2009
Location: GTA
Posts: 181
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But you can confirm you have stealth?
Jason
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2022 Equinox RS
2023 Trailblazer RS 2023 ZL1 Convertible |
12-01-2020, 07:11 PM | #6 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,763
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Even if it doesn't you can tune any of the modes to be "stealth" with HPtuners.
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12-01-2020, 07:11 PM | #7 |
Drives: rally green LT1 manual Join Date: Jul 2018
Location: Indiana
Posts: 282
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LT1 has stealth, tour, sport, and auto (follows drive mode). It does not have a track option. Stealth really quiets down cold start, which is pretty loud in tour or sport. Only catch is you have select stealth mode manually in the vehicle settings every time you want to use it.
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12-01-2020, 08:11 PM | #8 |
Drives: 17 2SS, 8L90, Cam, Heads, E85 Join Date: Dec 2016
Location: US
Posts: 1,196
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Even with "stealth" mode on (valves closed 100%) it is still pretty loud in my opinion on startup, enough so I could see some do-gooder neighbors still getting mad. The loudness is made worse on a cold start since it retards the injection and spark timing and increases RPM and throttle on cold starts to help warm up the cats. The retarded timing (in my opinion) makes the exhaust louder as well.
I can't believe GM let the Camaro with the NPP out of the factory as loud as it is during startup, but that is what it took to meet cold start emissions I guess and there's probably no immediate noise level requirement. I've never heard a non-NPP in person but I would imagine it is a lot more quiet, especially during the initial startup rev up. Also I believe the stock tuning opens the valves during startup for the supposed "cool rumble effect". Although I can't remember it might close during startup if you force stealth mode, which you would have to force it through the menu, since I think it defaults back to tour mode (where the stock tuning sets the NPP valves fully open on startup) (like 6sigma said above). HP Tuners can set the startup rumble and customize the opening on all the modes however you want it though. |
12-01-2020, 08:41 PM | #9 | |
Drives: 19 Chevrolet Camaro 2SS 1LE Shock Join Date: Apr 2020
Location: BC, Canada
Posts: 1,947
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Quote:
M4 cold starts are even louder.
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12-01-2020, 08:56 PM | #10 |
Drives: 2021 LT1 6spd Join Date: Nov 2020
Location: Arlington, VA
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LT1 has Stealth, Sport, and Track.
I believe the Snow/Ice setting will put you on Stealth without choosing through the menus.
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12-01-2020, 09:50 PM | #11 |
Drives: 2020 Camaro LT1 Join Date: Nov 2020
Location: CA
Posts: 9
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I don't have a stealth mode in my 2020 LT1. Have Tour, Sport and Snow/Ice...Snow/Ice and Tour sound exactly the same to me
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12-01-2020, 10:18 PM | #12 | |
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 11,490
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Quote:
https://www.chevrolet.com/content/da...art-072319.pdf
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12-02-2020, 02:50 AM | #13 |
Drives: 2020 Camaro LT1 Join Date: Feb 2020
Location: Kansas City Metro
Posts: 541
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12-02-2020, 07:32 AM | #14 |
Drives: 2023 ZL1 Vert M6 "Sharky" Join Date: Mar 2020
Location: Earth
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FWIW,
My 2020 SS with NPP is just as loud on startup no matter what mode I turn it off in. And it will not let me change modes unless the car is started. |
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