Quiet Start Mode for Stingray
Thread Starter
Race Director
Joined: Sep 2016
Posts: 13,180
Likes: 10,518
Quiet Start Mode for Stingray
At the Bash, it was discovered that the Z06 will have the option of a quiet start. Many have asked for this on the Stingray. While there is no indication GM will ever offer this as an update to Stingrays, there is a work-around:
1. Put the car in service mode (hold the start button without your foot on the brake for 5 to 8 seconds, until the dash lights up)
2. Rotate the mode **** to Weather Mode
3. Put your foot on the brake and start the car. It will remain in Weather Mode, and start up with much less noise.
1. Put the car in service mode (hold the start button without your foot on the brake for 5 to 8 seconds, until the dash lights up)
2. Rotate the mode **** to Weather Mode
3. Put your foot on the brake and start the car. It will remain in Weather Mode, and start up with much less noise.
Racer
Joined: Jan 2022
Posts: 351
Likes: 221
From: DFW, TX
I have my-mode set to the loudest exhaust, but I switch over to tour mode when I park at home. Doesn't seem to quiet the start by much though...
Are you saying that weather mode starts are noticeably less loud than tour mode starts?
Are you saying that weather mode starts are noticeably less loud than tour mode starts?
Drifting
Joined: Oct 2021
Posts: 1,273
Likes: 765
However, I wonder if that loud startup is not performing some function other than annoying people so if you are always overriding there is some function not being performed. Was that addressed at the Bash? I don't believe GM would make all that noise for no reason.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 34,840
Likes: 12,284
From: NE South Carolina
^^^
I was of that opinion thinking why would GM be so foolish for a few seconds on starting. Then someone posted a GM statement from an electronic service manual saying that is why it is done.
I had thought it related to getting the CATs hot quickly to reduce pollution. They apparently do things to help that but the wide open NPP is to make noise! Perhaps it's both.
I was of that opinion thinking why would GM be so foolish for a few seconds on starting. Then someone posted a GM statement from an electronic service manual saying that is why it is done.
I had thought it related to getting the CATs hot quickly to reduce pollution. They apparently do things to help that but the wide open NPP is to make noise! Perhaps it's both.
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Melting Slicks
Joined: Apr 2021
Posts: 2,752
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From: Simi Valley, CA
2022 C8 of the Year Finalist - Modified
Yes, I don't think the driving mode settings affect the first few seconds of cold-start. Only when the idle rpm starts dropping off. Then the mode settings for exhaust kick in.
Drifting
Joined: May 2010
Posts: 1,839
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Startups requires the engine RPM to be higher. The NPP valves stay open, by default, until the engine idles down below a certain RPM after the engine starts to warm up. The computer will open up the NPP valves only when you reach a certain RPM when driving or when using a certain driving mode.
Race Director
Joined: Mar 2007
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Melting Slicks
Joined: Apr 2021
Posts: 2,752
Likes: 2,323
From: Simi Valley, CA
2022 C8 of the Year Finalist - Modified
Yes, that will work once the idle rpm slows down (in 15-30 seconds). However you still get the roar at initial startup. I don't know any way to avoid that.
Racer
Joined: Jun 2021
Posts: 441
Likes: 382
The good news for me is there is a guy down the street with a Charger and aftermarket exhaust that is about 5 times louder so they see me as "not as annoying as him" at 6 am.
Racer
Joined: Jun 2005
Posts: 295
Likes: 151
From: Aliso Viejo CA
The loud startup is unavoidable. While I like it most of the time, there are definitely times I need it quieter. They should put in a software fix for this to make it optional. Starting in weather mode will not change how loud the first few seconds are...
Team Owner
Joined: Oct 2004
Posts: 25,583
Likes: 16,940
The procedure described in the OP, which basically just starting the car in Weather Mode, definitely works for a significantly quieter start on our '22. You can either do the procedure in the OP, or if you want it to always start quietly in your neighborhood, get in the habit of putting it Weather Mode when you shut it down.
Race Director
Joined: Aug 2016
Posts: 12,705
Likes: 10,131
From: Garden Valley CA
The procedure described in the OP, which basically just starting the car in Weather Mode, definitely works for a significantly quieter start on our '22. You can either do the procedure in the OP, or if you want it to always start quietly in your neighborhood, get in the habit of putting it Weather Mode when you shut it down.
Team Owner
Joined: Oct 2004
Posts: 25,583
Likes: 16,940
OK, thanks. I hadn't ever had the car in Weather mode until experimenting with the cold start test today, and haven't yet tried starting it in that mode after shutting down. It's still not a big deal. It only takes 4-5 seconds to put it in service mode, switch to Weather mode, then start.
It is rather silly that Weather mode wasn't included with Tour, Sport, and My Mode in restarting in the mode you shutdown in.
It is rather silly that Weather mode wasn't included with Tour, Sport, and My Mode in restarting in the mode you shutdown in.
