tomsobien

With the selector in sport mode for the exhaust tuning, when I get to a cruise speed, the exhaust goes quiet, same sound as Tour mode. Chevrolet is trying to say this is normal, but it wasn't normal for the first 3 months I owned the car. Looking for verification that I am not crazy, well at least not about this. Can other Z06 owners tell me if the sound at speedis the same sound as TOUR mode when you have it set to Sport.

Oskee

No you are not crazy My 2015 Z06 and my currant 2017 Z06 does exactly what yours does. When set to sport or track mode it goes quiet cruising down the hi-way .

atljar

Yes mine works the same way. Quiets at cruise. I think its great!

tomsobien

Is it the same sound as Tour mode, or is there a difference?

atljar

Eco/Weather - The valves stay shut all the time
Tour - keeps the valves shut at all times unless you are hammering on it
Sport - keeps the valve open at idle and aggressive driving, but shuts them at steady state cruise
Track - Keeps them open all the time

Mr. Gizmo

When I hammer on it while eco/weather for the active handling setting on my c7z — the baffles open.

there is also a driving mode selection for exhaust setting the options are stealth, tour , sport and track.

Regardless of what active handling mode your in or exhaust setting your in if you hammer on it and the car is getting traction the exhaust flap/baffles always open full on

atljar

Interesting. I literally never use the mode, so my experience is nil. I was paraphrasing the GM service manual.

Mr. Gizmo

there is active handling the round **** on the console which has eco, wet , tour, sport and track ( then in track you have 5 or 6 sub settings there with the least intrusive called Race.)

Then there is driver mode up on the center screen. Which is a touch screen selection . Who knows there might also be a **** you can turn to make selections here. There is steering and exhaust mode settings there —- for exhaust you have stealth, tour, sport and track.

You can have active handling set to eco and exhaust setting set to track. Or you can have active handling set to track from there you can select the race sub mode. Then on the exhaust settings you can put it into stealth

that’s for stealthy racing or loud economy driving.

Our cars are very feature and function rich.

hebegb

With the A8 in auto mode and exhaust set to Track, accelerating keeps the valves open unless I ease off the gas before it reaches top gear (6, 7 or 8). When it shifts into that gear mine becomes significantly quieter, almost like Tour or Sport mode. This does not happen if I continue to accelerate into that gear.

Neumonic2002

Mine is the same as you described....

Bill Dearborn

In Sport Mode the valves are open most of the time except when the engine is operating in V4 mode. This only affects A8s since M7s don't have V4 operation unless the drive mode is set to ECO. If you have an A8 when you hear the engine sound get quiet that means the engine went into V4 operation. Even if you have the RANGE Module installed that might not stop the exhaust valves from closing since they are controlled by the chassis control module not the ECM.

Do you want the exhaust loud or quiet? If you want loud all the time touch the settings Icon on the center dash display and then touch the Engine Sound Management icon and then choose whether you want Stealth, Tour or Track. In Track the exhaust is open all the time except when the engine is operating in V4 mode. If you have an A8 you can prevent running in V4 Mode by putting the transmission into manual mode and using the paddles to shift gears.

Bill

Mr. Gizmo

i thought it could also go to v4 mode with the m7 in tour. Wet as well as the eco setting.

hebegb

I do have the Range module so no V4 mode. If I contine to accelerate while the car goes into 8th, the exhaust valves stay open even in that gear. If I accelerate quickly and then ease off the pedal before going into 6th (up to about 47mph), 7th (48 to about 60mph) or 8th (61mph and above), the valves close when those gears are engaged.

Bill Dearborn

Not in Tour. ECO Mode for sure. Don't know about Weather but the few times I have used Weather I didn't notice it. It definitely doesn't go into V4 mode in Track/Wet Mode. One of these days when I am driving around town I will have to run the car in the following modes Tour, ECO and maybe Weather and turn on the PDR to record speeds, rpm, and exhaust sounds which can be picked up while driving with rpms in the 1200 region. Exhaust going from noise to silent is a clear indication of V4 operation starting.

What I don't understand is why so many people argue with what GM tells us Vs getting in their cars and setting the conditions that allow the exhaust to operate this way and finding out for themselves. There are a lot of nay sayers who completely miss the idea of actually finding out for themselves and maybe blowing their belief that pulling the fuse is necessary. I have no idea why people want to hear the exhaust noise when the car is running in V4 mode since the reason GM decided to obscure it was because it is objectionable.

Bill

ahero4eternity

Not true. Otherwise, people like me would not pull the fuse.

saleen556

You are correct. I quit trying to convince people. I put in a M2W switch so mine is open all the time unless I manually close them. Best of both worlds. Very noticeable on stock car. Even more so with an off road Xpipe.

atljar

Just going by Mitchell, which is populated from GM docs.

saleen556

This is either an error or a change. As even in my 17 the valves closed at certain RPMS in Track mode. That’s why I did the M2W. Mines an M7 so I don’t deal with AFM.

Bill Dearborn

You can lead a horse to water but you can't make them drink.

Bill

bluekey28

Pull fuse #42 & be done with it!