NPP Exhaust
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Joined: Jun 2013
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From: Omaha NE & Crescent City FL
NPP Exhaust
Does anyone know if the NPP exhaust in normal mode is any louder than the Base exhaust while just cruising. I would like to order it but not if it's too loud for DD driving.
Thanks.
Thanks.
Safety Car
Joined: Dec 2003
Posts: 3,641
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From: Pacific Northwest
You get to select which of five exhaust loudness modes you want using your drive mode selector, and then, if you wish, you can "latch" (keep) that mode by using your driver information center.
Race Director
Joined: Aug 1999
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From: Bluffton SC via Canton Oh
In bowling green a few weeks back I was told it is basically the same at the C6 with electronic baffles instead of the vacuum system in the C6. So I assume its the same drone. I'll bypass this option.
Drifting
Joined: Jun 2013
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From: Cumming GA
On order: Torch Red Z51
Since they say it reduces the back pressure several percentage points and increases the HP (they didn't say how much) you could 'infer' some tick higher in economy but probably not enough to dictate which mode you use.
Le Mans Master
Joined: Oct 2004
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From: Haymarket Virginia
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Safety Car
Joined: Dec 2003
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From: Pacific Northwest
NPP, as per above post, if anything, is more fuel efficient, but again,
probably not by much.
Racer
Joined: Feb 2012
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From: Atlanta Georgia
Burning Brakes
Joined: Jun 2013
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From: Pittsburgh, PA
I understand the NPP exhaust will have different driving modes. I'm curious if say in tour or eco if it would stay in "quite" mode the whole time. I wouldn't mind that for times when I don't want to draw attention to myself (cops). In track I would like system to stay in loud mode whole time from idle to redline. Anyone know details of how system works?
AIR FORCE VETERAN
Joined: Nov 2009
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From: Pennsylvania
Safety Car
Joined: Dec 2003
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From: USA
There's not going to be any drone if you have it in the Tour mode, although I don't know why anyone would want to have a Corvette that sounds like a Buick or Cadillac. This thing should be in Sport mode 100% of the time as far as I'm concerned.
Safety Car
Joined: Dec 2003
Posts: 3,641
Likes: 2,689
From: Pacific Northwest
I understand the NPP exhaust will have different driving modes. I'm curious if say in tour or eco if it would stay in "quite" mode the whole time. I wouldn't mind that for times when I don't want to draw attention to myself (cops). In track I would like system to stay in loud mode whole time from idle to redline. Anyone know details of how system works?
There was one early article which said that with NPP you got seven exhaust modes, including also "city" and "stealth." Have not seen corroboration of those two extra exhaust modes since.
Drifting
Joined: Jan 2003
Posts: 1,327
Likes: 17
From: Maryland
OK.. let me be clear.. because I want the NPP on this as I had on my C6. Before I had MILD2WILD hooked into the NPP Fuse so I could open close it.. are U guys saying that that feature will be a STOCK feature based on which MODE U put the car in? And I can sell my C6 M2Wild on Ebay??? Thanx for any clarification.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
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From: NE South Carolina
Actually I think I got better mileage on my C6 once I put a switch in to control when it opened! Didn't have to go to high rpm to engage it and the burbling when you back off at low speeds was worth the price! Have ordered with the C7 and it sounds like I will not have add a switch or whatever to have it open when desired. However I liked the idea of using a simple switch to have full control. Will have to see when it is delivered.
Pro
Joined: Jan 2013
Posts: 639
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From: DFW TX
OK.. let me be clear.. because I want the NPP on this as I had on my C6. Before I had MILD2WILD hooked into the NPP Fuse so I could open close it.. are U guys saying that that feature will be a STOCK feature based on which MODE U put the car in? And I can sell my C6 M2Wild on Ebay??? Thanx for any clarification.
We were told that the driving modes have default settings and those can be changed to your liking.
One of the changes in the driving mode is the function of the NPP exhaust, so as long as they don't omit this as a changeable option you should be good to go.
It might not be as accessible as a M2W switch, but we will have to see.
Drifting
Joined: Jun 2013
Posts: 1,764
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From: Cumming GA
On order: Torch Red Z51
Full Throttle acceleration
This is the best 'sound' quality I've heard yet under full throttle. I saw it once and took several hours of searching later to find it again. Not best video nor worst, but sound, wow !!! At first it's quite like maybe tour mode, then as if it was switched, gives off a good rap. Guy with camera say's "alright, just get on it, ya know he won't. RAPPP Ya he will" 
Last edited by Cruiter; Jul 16, 2013 at 10:24 PM. Reason: info
Racer
Joined: Aug 2006
Posts: 278
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From: NY
On the standard exhaust there are two electrically operated valves. On the NPP, there are four valves. They operate (change loudness) based on either the driver mode selector option you have chosen (eco, weather, sport, tour, or track) OR what you have chosen your personal setting via the driver information center (DIC). Via the DIC, you set what you want (not just exhaust but perhaps up to 50 other variables). Once you have set it (and you can just as easily un-set/change all or one of your choices), it will stay in your latched mode regardless of whether you change your driver select mode, and regardless of whether the car is turned off or on. It is "latched." You can therefore, if you wish, set your exhaust to always be loud or always quiet, or in-between, or if you do not latch it, the loudness (and other performance parameters) will change as you change the driver selector mode. Again the same is true of up to 50 other variables (e.g., whether the screen in front of the driver shows a friction bubble, transaxle temp, turn-by-turn directions, radio station, oil pressure, etc.).
There was one early article which said that with NPP you got seven exhaust modes, including also "city" and "stealth." Have not seen corroboration of those two extra exhaust modes since.
There was one early article which said that with NPP you got seven exhaust modes, including also "city" and "stealth." Have not seen corroboration of those two extra exhaust modes since.