Engine Sound Management

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Apr 24, 2014 | 07:49 AM

smithrebel

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Joined: Apr 2014

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From: Hollidaysburg PA

Engine Sound Management

What exactly is this? Does it effect anything but noise? I like the noise!

Apr 24, 2014 | 08:45 AM

gthal

Safety Car

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Set to "off" and the NPP exhaust is on loud all of the time. Otherwise, NPP is controlled by the driving mode. You want it "off"

Apr 24, 2014 | 05:04 PM

KenHorse

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From: I live my life by 2 rules. 1) Never share everything you know. 2)

St. Jude Donor '11-'12-'13, '16-'17-'18

Quote:

Originally Posted by gthal

Set to "off" and the NPP exhaust is on loud all of the time.

Well.. "mostly". At least on my M7 where there are still times the baffles close...

Apr 24, 2014 | 05:59 PM

C7pimp

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In ECO mode the valves will close.

Otherwise, it is louder at idle and all through the rpm range regardless of driver mode selected.

Apr 24, 2014 | 07:54 PM

KenHorse

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From: I live my life by 2 rules. 1) Never share everything you know. 2)

St. Jude Donor '11-'12-'13, '16-'17-'18

Quote:

Originally Posted by C7pimp

In ECO mode the valves will close.

Otherwise, it is louder at idle and all through the rpm range regardless of driver mode selected.

Nope. Not in my M7 Z51 it doesn't

Apr 24, 2014 | 08:15 PM

slief

Melting Slicks

Joined: May 2007

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From: Simi Valley Ca

Quote:

Originally Posted by C7pimp

In ECO mode the valves will close.

Otherwise, it is louder at idle and all through the rpm range regardless of driver mode selected.

The valves controlled by engine sound management are the two at the ends of the mufflers and those will NOT close if engine sound management is disabled as far as I am aware. The ones before the mufflers are exclusively for V4 mode and those are still active when engine sound management is disabled. Thus the extreme difference in sound when ECO mode engages with engine sound management disabled.

Apr 24, 2014 | 08:18 PM

KenHorse

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Posts: 136,140

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From: I live my life by 2 rules. 1) Never share everything you know. 2)

St. Jude Donor '11-'12-'13, '16-'17-'18

Quote:

Originally Posted by slief

The valves controlled by engine sound management are the two at the ends of the mufflers and those will NOT close if engine sound management is disabled as far as I am aware.

On my C7 Z51, they close at times despite Engine Sound Management being turned OFF. If I'm not mistaken, there are some other threads about this phenomenon.