[StateOfMind415]

Originally Posted by Glen e

That won't work either because there's no power going to the valves for a split second,when you start the Car!

I see what you mean. The split second is soo minimal that the overall startup sound will be much quieter than any other mode.

I'll try to make a short "cold start" comparison video between stealth vs sport today or tomorrow for anyone who is interested in hearing the difference in sound.

[Jimtasteek]

Originally Posted by StateOfMind415

I see what you mean. The split second is soo minimal that the overall startup sound will be much quieter than any other mode.

I'll try to make a short "cold start" comparison video between stealth vs sport today or tomorrow for anyone who is interested in hearing the difference in sound.

Please do!

[6spdhyperblue]

I just had someone start it and watched the valve. By the time the starter turns the engine over, The valve closes before the engine fires. The valve wins the race

This was with the exhaust set to stealth in the setting mode prior to shutting the car off...not snow/ice

[crazydmc]

Originally Posted by Nicul15

I just had someone start it and watched the valve. By the time the starter turns the engine over, The valve closes before the engine fires. The valve wins the race

This was with the exhaust set to stealth in the setting mode prior to shutting the car off...not snow/ice

I can confirm... quiet cold start this morning!
(Drive mode was in Sport when engine was shut off)

1) press and hold start button (with no feet on pedals) for about 5 seconds until "service mode" turns on (everything turns on as if the engine was running)
2) switch drive mode to snow/ice
3) foot on brake, start engine... nice and quiet

[Dysan911]

Originally Posted by crazydmc

I can confirm... quiet cold start this morning!
(Drive mode was in Sport when engine was shut off)

1) press and hold start button (with no feet on pedals) for about 5 seconds until "service mode" turns on (everything turns on as if the engine was running)
2) switch drive mode to snow/ice
3) foot on brake, start engine... nice and quiet

So that means you at least have your Exhaust setting following the Mode switch.

I did the exact same thing as you but instead went through the menu and select "Sound Management" and picked "Stealth". It fired up loud as though it was still in Track mode.

Maybe there's a glitch that the exhaust sound has to be mapped to the switch in order to get a quiet startup.

I'll have to try that.

[6spdhyperblue]

Originally Posted by Dysan911

So that means you at least have your Exhaust setting following the Mode switch.

I did the exact same thing as you but instead went through the menu and select "Sound Management" and picked "Stealth". It fired up loud as though it was still in Track mode.

Maybe there's a glitch that the exhaust sound has to be mapped to the switch in order to get a quiet startup.

I'll have to try that.

i do what you do, and it works every time. i would get that checked out

[Emoto]

Originally Posted by crazydmc

I can confirm... quiet cold start this morning!
(Drive mode was in Sport when engine was shut off)

1) press and hold start button (with no feet on pedals) for about 5 seconds until "service mode" turns on (everything turns on as if the engine was running)
2) switch drive mode to snow/ice
3) foot on brake, start engine... nice and quiet

I just tried this when I left work tonight. Works exactly as you said. Thanks!

[StateOfMind415]

Originally Posted by Dysan911

So that means you at least have your Exhaust setting following the Mode switch.

I did the exact same thing as you but instead went through the menu and select "Sound Management" and picked "Stealth". It fired up loud as though it was still in Track mode.

Maybe there's a glitch that the exhaust sound has to be mapped to the switch in order to get a quiet startup.

I'll have to try that.

I would also double check the NPP fuse #51 to confirm it's installed correctly and not blown.

[StateOfMind415]

A bit late, but here is the cold start comparison between Sport mode (valves open) vs. Ice/Snow mode (valves closed). Both Videos were recorded on different mornings. Mods are Roto-Fab CAI and Borla x-pipe with secondary cat delete to stock NPP muffler. I'm sure a stock Camaro will be much quieter.

Sport Mode: https://youtu.be/NMNsV45pDYE
Ice/Snow Mode: https://youtu.be/txXMU9SUDkM

[Dysan911]

Originally Posted by StateOfMind415

A bit late, but here is the cold start comparison between Sport mode (valves open) vs. Ice/Snow mode (valves closed). Both Videos were recorded on different mornings. Mods are Roto-Fab CAI and Borla x-pipe with secondary cat delete to stock NPP muffler. I'm sure a stock Camaro will be much quieter.

Sport Mode: https://youtu.be/NMNsV45pDYE
Ice/Snow Mode: https://youtu.be/txXMU9SUDkM

Nice! So was this done simply by changing the driver mode switch to snow/ice? Or drilling down into the system menu under sound management?

Lately I've had my npp fuse pulled and love the sound of the valve open all the time but would be nice to start up on quiet on those super early mornings I have to do once in while.

[StateOfMind415]

Originally Posted by Dysan911

Nice! So was this done simply by changing the driver mode switch to snow/ice? Or drilling down into the system menu under sound management?

Lately I've had my npp fuse pulled and love the sound of the valve open all the time but would be nice to start up on quiet on those super early mornings I have to do once in while.

Yes, this was done by switching the mode to Snow/Ice mode. It's sound is equivalent to having the mode always set to stealth in the system menu.

I had my fuse pulled, but after a while I couldn't stand the drone it would make under 2k rpms especially in 6th gear (M6), so I put it back in. The computer closes the exhaust values to silence the drone. Also, since the cat delete and roto-fab CAI boosted my exhaust's sound levels, it's more convenient to control everything from the switch by switching to different modes when needed.