That is being a little overdramatic as the exhaust is not that loud.

 

Depends on how close the homes are and the population within the home. If you just got your baby down and I start my car we are not gonna be friends. I know ,sucks for them, but I try and be a respectful nieghbor. I’d pay a one time fee for a good nieghbor start feature.

 

To Make matters worse, I have a Borla S-Type exhaust on mine. If it is early morning or late at night I put it in weather mode and keep my garage door closed for the first 30 seconds.

 

I'd say it's more like 10 seconds, maybe 15 max.

 

The RPM starts to get lower (and the exhaust quieter) after 10-15 seconds. It gets to the loudness level of the exhaust mode you have set (and the RPM back to normal) after 30 seconds or more.

 

So you say. I agree with him, as do others.

 

Same loud issue with my 23 ZL1. I just start it with garage door closed.

 

On my Z06 (using MyMode set to track), I start the car and put in weather mode. It instantly quiets the exhaust down.

 

Before my neighbors complain about my morning start up, they need to first complain about the much louder Mustang GT start up across the street from me.......so I'm good.

 

I would think if Ford offers a "good neighbor mode" the folks at Corvette could add this feature with a simple flash update to the software. There are so many people like myself who simply need a more a Quite Start Up Option so my condo neighbors and HOA don't come down on me. Comeon' Chevy. Betcha it's a simple software fix. Help us out! As soon as you do, you can count on me to buy a fully loaded Stingray.

*Please don't tell me for $30K more, I can buy an E Ray with Stealth. We all know this. What we need is a simple software update. Please.

** HERE IT IS **
"Good Neighbor Mode" on a Ford Mustang refers to a setting on the car's exhaust system that allows the driver to significantly quiet the engine noise, essentially acting as a "quiet start" feature, so as to not disturb neighbors, particularly during early morning or late night hours; it's essentially a way to control the volume of the engine sound depending on the time of day or situation, often accessible through the vehicle's settings menu.

WATCH THIS FORD GOOD NEIGHBOR DEMO >>

You Tube

 

What would the software update do exactly? The normal starting is in Tour Driver Mode. Although the exhaust flow control valves are open during the crank event, the tailpipe flow control valves, if you have NPP, close immediately when the engine starts - right away. I have filmed that, video attached. Any extra loudness that is heard after the engine starts, while idling, is entirely due to modifications to idle speed, timing and air/fuel mixture as part of the "cold start strategy". And the purpose of the cold start strategy is to warm up the cats quickly - for emission control purposes. Those without NPP report a similar start up "bark" and a louder exhaust note as well, and there are no tailpipe flow control valves to close.

I think a software modification could be made to close the tailpipe flow control valves before the crank event on NPP cars, but that would not cut down on the louder exhaust sound that we hear for a period after the car starts, because in Tour mode those valves are already closed. They would have to modify the cold start strategy, and I do no know how much leeway they have there, since its in part motivated by emission control requirements. I know that in surveys GM has asked if owners would be interested in stealth start up mode so maybe they have something in mind. And of course with Eray there is stealth mode, but in that case the ICE is off.

Cold Start Strategy
"The catalyst must be warmed to efficiently reduce the emissions. The cold start strategy is to reduce the amount of time it takes to warm the catalyst. During a cold start, the engine spark timing is altered to allow the catalyst to warm quickly. This diagnostic monitors the following to build an exhaust energy model:
Spark advance
Engine airflow
Engine coolant temperature
Engine run time
Engine idle speed
Catalyst temperature
The actual model is then compared to the expected exhaust energy model. Fuel trim bias is used to keep the post catalyst air/fuel ratio within a predetermined range. This allows optimal catalyst efficiency under various operating conditions. The engine control module (ECM) constantly monitors how lean or rich the fuel trim bias is commanded, to determine if the fuel trim bias is greater than a calibrated amount."

Tailpipe Flow Control Valves close after start, in Tour Mode:
"Once the engine is running, accelerator pedal position, transmission gear and engine speed are used to determine the commanded state (open or closed) of the exhaust tailpipe valves.
Tour Mode: Exhaust tailpipe valves are closed when the engine is idling and during normal/non-aggressive driving. Valves open during aggressive driving."

Attached is a video showing the motion of the tailpipe flow control valve from a stone cold start. It is defaulted to open before the crank event. You will see it move immediately after the engine starts, to the closed position.

 

I start mine in Tour mode with the garage door closed. My driveway points directly at my across the street neighbor's bedroom.

 

The instructors went over this at the Ron Fellows Corvette Drivers school when we attended in September last year. IIRC you need to shut the car off in Weather(?) mode for it to start up more quietly. Our lead instructor (former IndyCar) informed the class that the other option is to tell the neighbors to "---- it", which raised much laughter, but it was all in good humor.

 

On mine, if shut off in Weather Drive Mode, it will revert to Tour Mode when started. The only Driver Mode that survives the ignition cycle is MyMode (some have reported that Sport Driver Mode will also survive an ignition cycle, but not all do that, and mine does not). All others will revert to Tour Driver Mode after a restart. But it does not matter anyway. Regardless of the Driver Mode, the tailpipe flow control valves open during the crank event for my 2021 Stingray (and I believe that is true for all Stringrays). In Tour Driver Mode, the tailpipe flow control valves close immediately after starting and remain closed during idle and normal driving, opening only for aggressive driving. If the car is switched to Weather Driver Mode, or if engine sound is set to Stealth (in Z mode or MyMode), the tailpipe flow control valves will be closed all the time after the car starts.

 

Closing the AFM valves for startup would be stealthier. Mine are disconnected so I can try closing them manually. If anyone hears a loud explosion, you'll know how it worked out. Jokes aside, I think it'd be fine.

 

That's right, MyMode. NOT Weather mode. Thanks for the correction

 

Really don't see what the big deal is here in any of the many situations presented IF they are NOT daily occurrences ... I will be backing out of my drive and exhaust pointing directly at neighbor's house and 'maybe' bedroom ... but will not be doing it daily or regularly at oh dark 30 ... and if he says something ... as others have mentioned, his landscapers come pretty early weekly ... so .. it is what it is or will be I should say.

 

During COVID, I was essentially the only one going into the office... but I had to get in early. I was cranking up my C7 at 4:30 in the morning, every morning, so yeah... it kinda became problematic.

 

My 2023 Mustang GT had the good neighbor mode on it which you could set times with....it was amazing for just this. I have to be really careful with the C8 now. I have the Performance Exhaust option which makes it even worse. I sometimes would park my car in my driveway and then have to move it into the garage for night time....with the C8 I have noticed that if I park it in tour mode or in weather mode and start it form the start button I am fine....but the remote start is NOT an option...it will fire up and pop when its cold.

My mustang made me look like a good neighbor...the C8 makes me actually have to try. I chalk it up to an upgrade in performance car...so I have to be a bit more responsible.

If I did start the mustang in track mode it was insane loud...so I just actually have to be careful with this one

 

Again (unless it has changed in later models), if you have NPP, the tailpipe flow control valves are going to be open when the car is off, and open during the crank event regardless of the previous mode or setting when the car was last turned off. It does not matter how the car was started (remote or from in the car). After it start, the tailpipe flow control valves close immediately if the car starts in Tour Mode, or MyMode with engine sound set to Stealth or Tour. With either setting, the valves are closed at idle. The Stealth setting will keep them closed under all conditions. In Tour, they may open with aggressive acceleration.

See post 29 at this link for video evidence of all this.
https://www.corvetteforum.com/forums...post1607148160