dvilin

Does not matter what mode you are in and how you set it the valves will not stay open 100% of the time as Elk stated you must pull the fuse to accomplish 100% open npp valves.

Kehraus

I have a mild2wild switch, programmed to the buttons on the visor. I leave for work at 5:15am and do the quiet button until I'm out of the neighborhood. After that, I press the loud button and run that the rest of the time. When the loud button is on the valves are open all the time, quiet mode they operate as stock according to the setting you choose.

4thC4at60

In the 99,750x miles I put on my MN7 I really can't say I ever noticed.... I just drove the thing....

owc6

dvilin and others are correct.

The valves will not stay open 100% of the time unless the fuse is pulled. There are many situations where the valves will slightly close (cruising , light load and such).

Skid Row Joe

There's damned near always an M7 "bark" from Rev Match irregardless whether your C7 has NPP or not.

owc6

Downshifting: there is a really satisfying "POP" if you time it right.

Upshifting there is no M7 bark. Upon upshifting an A6 or A8 there a freaking awesome BARK on WOT, which does not happen on MT.

Skid Row Joe

I rarely downshift when slowing. Just put it in neutral and brake if necessary. Shifting into 2nd from neutral as I round a 90° city corner and go on my way. It's gratifying to drive a MT Corvette.

owc6

OK, so not sure when the " bark" happens for you.

Skid Row Joe

When I shift to neutral.

owc6

So down?

micwhitt1

What you're stating makes more sense, assuming I'm understanding you and that I'm not hearing things while driving my car. In Track mode, when set through the infotainment system, the NPP valves PARTIALLY close when the engine is under light load. In Tour, and Sport modes, the NPP valves FULLY close when the engine is under light load. In Stealth mode, the NPP valves simply do not open (thus the statement in the owners manual about using Stealth mode during track events/competitive driving and damaging the valve actuators). Right?

speed4tu

Get a mild to wild switch to avoid the valves randomly closing. One of the best low cost things I have done to my car.

owc6

Close enough to not make no nevermind.

dvilin

You got it.

Skid Row Joe

From any other gear than 1st.

The RevMatch synchs in upshifts is where it really 👌 does pay off in engaging at startup. The "bark" I don’t need when going to neutral and coasting - but it's great to have the technological rev matching on up shifts when driving it in normally easy driving.
Even though I don't care to downshift to slow the car. Popping it neutral to me is so much easier and then braking as necessary to slow the car.

Bill Dearborn

Not true. There are only two positions for the valves. Completely closed or completely open. With the M7 transmission and the exhaust set In track mode, they are open all the time except when the engine is operating in AFM mode and switches to 4 cylinder operation, and when in fifth gear with the RPMs below 1500. When the engine is operating at part throttle the valves are open and the lack of noise is because the engine isn't making much noise. With a Z06 M7, you can easily tell the difference. Place the Drive Mode in Eco and then drive around town at speeds up to 50 mph range. Be easy on the throttle like you are driving in bumper-to-bumper traffic. In the first three gears, the valves will be open all the time since AFM doesn't operate in the first three gears. In 4th through 7th you will hear the exhaust go very quiet and then suddenly get louder. When the exhaust gets quiet the engine has switched into 4 cylinder mode and when it gets louder it has switched back to 8 cylinder mode. After doing that for a while switch to Tour Mode and the exhaust will stay loud until fifth gear when the valves close below 1500 rpm. As you accelerate slowly in fifth you will hear the valves pop open when the RPMs reach 1500 at about 42 mph.

As for Stealth Mode, the valves do open when the rpm and engine load get to a certain point. Several forum members have found this out when running tracks with sound-level rules. Even in Stealth Mode, the valves opened and they exceeded the track sound limit.

Bill

4thC4at60

Driven MN cars since '57, autos too.... corner downshift? Pop the paddles down as many as necessary and accomplish the same thing....

Skid Row Joe

👎
Automatic transmissions are "not the same thing." Not even close.

Bill Dearborn

You need to get out more. The newer auto transmissions are great when you want to do performance driving. The big issue with the Corvette A8 is it keeps the engine rpm so high the Z06 tends to overheat when driven hard on a track.

Bill