Does it make exhaust any louder then stock z51 or the same. Thanks

 

So it only 'controls' the NPP, which you can already control with the drive modes? How totally useful. Nothing is physically changed so there is no way it is going to be any louder than the NPP with the valves open. I suppose this thing forces the valves open at all times so it might be louder more of the time if you have it engaged, but not any louder than the NPP would be full open at full throttle.

 

With the engine/sound set to Track the NPP is open at idle and almost all of the other time, with the exception of when V4 kicks in, or some case to meet Federal Drive By Standards which I have yet to detect. There are threads about attempts to make it work but you could wire the tailpipe flow control valves open all the time, and I think it would be difficult to tell any difference between that and setting the engine/sound to Track.

 

Mild2Wild doesn’t do anything you can’t already do with the stock NPP controls.

 

Mild2wild let's you keep the npp valves open all the time. Factory no matter what mode your npp valves are always modulating depending on your rpm.

 

They do not "modulate" on the Stingray. (I have read that the Z06 does have variable position). But on the Stingray they are either open, or closed. Below is what the Service Manual says about how the engine/sound setting will affect the behavior of the tailpipe flow control valves. To be sure, they will close when AFM kicks in, and it appears to say they will close at times to meet the Federal Bypass Standard. I have tested this, and with the engine/sound set to Track, I have yet to actually detect them closing at anytime other than when V4 mode kicks in. I'm not saying they don't, just that it does not make any difference in perceived volume.

Note:
You may notice an exhaust tone change due to the AFM system activation, or during certain driving conditions to meet Federal noise pass-by
regulations. Review the cylinder deactivation exhaust flow control system operational modes listed below for additional details.
1.Stealth Mode: Exhaust tailpipe valves will be closed at all times when the engine is running.
2. Tour Mode: Exhaust tailpipe valves are closed when the engine is idling and during normal/non-aggressive driving. Valves open during
aggressive driving.
3. Sport Mode: Exhaust tailpipe valves are open when the engine is idling and during most driving scenarios. See note above.
4. Track Mode: Exhaust tailpipe valves are open at all times. See note above.

 

Everyone who has reported trying the Mild2Wild says it doesn't work at all on the C8.

 

I take it you haven't data logged the exhaust valves while driving?

 

Correct. I am going by what I hear. If you have data showing exactly when they close with the engine sound set to Track, other than when AFM is active, please share it. The manual says they do. My point was I have tried to drive that way and vary speeds and RPM to hear when they close, and I could not detect that condition. There is another lengthy thread where someone eventually did tie those valves open as a test _ before going to great lengths to control the them that way - and he determined the the perceived loudness was either no difference, or so subtle (relative to just setting engine sound to track mode) that he decided not to do it. And as noted, the M to W had not been reported to work on the C8. If you have a way to do that, that you have tried and it works, please share that too. Others have showed how to deal with the dual fuse, but it still has not been reported to work.

I'm serious about the data - if you have information about exactly when those valves close when engine sound is set to track mode (other than when they do close due to V4 mode) I and others would be interested in that.

When I say they do not modulate - I meant they do not have any positions other than open and closed. But I never said they don't close, only that I cannot detect that condition with engine sound set to track mode, other then when the AFM valves close. When testing for it with engine sound set to track, and the engine/shift set to track or in manual shift mode, which prevents AFM, I can't find the conditions where the valves close. They may, but I could not hear it.

 

Here is the thread about Mild to Wild to which I referred earlier. It discusses M to W issues, and also an experiment to see how "loud" the muffler would be if all the valves are just tied open (which would be the goal of the M to W if it worked).

Check out post 1 where the OP went back and summarized his results, post 24 where he completed the experiment, and post 32 at the end with a pretty definite conclusion. Although the entire thread is a good read because of its discussion of the M to W.

Here is snip from post 32 of that thread by @22c8z51 :

"Unfortunately, yes, my experiments proved that any method of keeping the valves open, whether you play with fuses or valves (i did both), does NOT produce any significant difference in sound worth the effort. Meaning, not any better than "Track". In fact I didn't hear any improvement at all. Perhaps there was a small increase at certain times (since this would have defeated any drive-by sound compliance done by valves), but I didn't detect any. I've updated the first post with my findings so nobody needs to go through this exercise."


https://www.corvetteforum.com/forums...ld-2-wild.html