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Old 09-18-2010, 09:38 AM   #1
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Dual mode exhaust

On the test cars they have the 4 tip exhaust maybe to allow a dual mode exhaust like on vettes? I acutally think it would be a nice feature to have especially if it was a 3" system, gt500s went to 2.8" this year I beleve. Sorry if this is old repeated speculation.
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Old 09-18-2010, 01:01 PM   #2
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I hope so. It'll make it that much harder to want to change them if they flow as well as the current mufflers and especially if we can just remove a fuse to keep them open all the time. I'd still consider a full 3-inch CB, just because that's about the most I can do with the exhaust (where I live), however, if it's as nice a ZR1/Z06 exhausts, I might just leave it. I hope you're right though
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Old 09-18-2010, 07:40 PM   #3
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Quote:
Originally Posted by nl12 View Post
On the test cars they have the 4 tip exhaust maybe to allow a dual mode exhaust like on vettes? I acutally think it would be a nice feature to have especially if it was a 3" system, gt500s went to 2.8" this year I beleve. Sorry if this is old repeated speculation.
I have thought the same thing. It would be the only reason I can think of for giving the Camaro quad exhausts....it really isn't part of the car's heritage, and only adds cost/weight, etc.

Buuuuttt....if it is dual mode exhaust...it would freaking awesome. There's something called "mild to wild" for the Corvette. It basically puts the dual mode system controls in the palm of your hand. You can switch it on or off at will. And a Corvette with wide open butterflies sounds wicked!!!
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Old 09-19-2010, 12:01 AM   #4
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I've also was hoping Chevy would make a Dual Mode exhaust available (standard or as an option) on the Z28 when the rumors first started of a supercharged Camaro. Hell, I was hoping they'd make it an option on the SS.

I think that the pictures that have been "leaked" or taken of the mules indicate that the Z28 WILL have the Dual Mode exhaust. I noticed that in most all pictures of the rear of the cars, the outboard tips appear to be lighter than the inboard tips.

Hopefully someone will get close enough to a mule (or have a good camera) to get a clear shot of the mufflers.
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Old 09-19-2010, 12:05 AM   #5
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I think it would be a very impressive option to have dual mode exhaust.
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Old 09-19-2010, 12:28 AM   #6
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I know i'm gonna sound dumb but it's the only way i can learn! what's dual mode exhaust?
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Old 09-19-2010, 12:29 AM   #7
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I think it would be a very impressive option to have dual mode exhaust.
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Old 09-19-2010, 01:01 AM   #8
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I know i'm gonna sound dumb but it's the only way i can learn! what's dual mode exhaust?
Exhaust goes through the muffler's baffles normally until you go full throttle at which point a butterfly valve opens and the exhaust goes straight through the muffler for unrestricted flow AND noise .
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Old 09-19-2010, 01:29 AM   #9
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Very trick and quite cool when the valve actuates. I love driving the old man's Z just to hear that change in timbre of the exhaust.
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Old 09-19-2010, 05:39 AM   #10
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That would be a nice option
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Old 09-19-2010, 10:32 PM   #11
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Quote:
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Exhaust goes through the muffler's baffles normally until you go full throttle at which point a butterfly valve opens and the exhaust goes straight through the muffler for unrestricted flow AND noise .
thank you!
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Old 09-19-2010, 10:37 PM   #12
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Quote:
Originally Posted by Ron66Vette&10SS View Post
Exhaust goes through the muffler's baffles normally until you go full throttle at which point a butterfly valve opens and the exhaust goes straight through the muffler for unrestricted flow AND noise .
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Originally Posted by xBlackout_Camaro View Post
thank you!
This is a pretty good example of the difference in sound. Just keep in mind, from the factory -- you can't control it like this. It only activates above 3000 rpm.

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Old 09-19-2010, 10:53 PM   #13
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I was thinking to do this to the car now with the OEM muflers but need to find a butterfly valve to use, Got some parts coming will let you know after.
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Old 09-20-2010, 12:30 AM   #14
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I'll say it now...I won't be surprised at all if this is standard on the Z28.

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Old 09-21-2010, 07:57 AM   #15
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This is a pretty good example of the difference in sound. Just keep in mind, from the factory -- you can't control it like this. It only activates above 3000 rpm.
Thanks for the reminder that this feature is not controllable, Joe. I spent some time in a new Corvette Grand Sport last month running it around Black Lake at Milford. This car had the dual mode exhaust and as great as it sounds when it's open in the upper RPM range, I did not like the continual "open & closing, open & closing" aspect of this option. The change in exhaust tone and volume is huge and if I can't control that, then I don't like it so much... to the point where it was getting on my nerves. I love a loud exhaust, but the change back and forth is what bothers me. I would not order this feature on a car.
I have a simple cutout on my 4th gen SS and I guess I'm used to having a consistent (either quieter or louder) exhaust note that I can change as I see fit.
A far less costly alternative to the dual mode system from the factory would seem to be the installation of an electric cutout that can be controlled by the driver from the cockpit.
Just my $0.02.

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Old 09-21-2010, 09:14 AM   #16
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Well if it isn't controllable from the factory, How does the guy in the video control his? I mean, it can't be that hard right? I think it would be sweet to be able to have two exhaust systems, one for performance and sound and one for smooth quite driving....
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Old 09-21-2010, 09:31 AM   #17
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He modded
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Old 09-21-2010, 09:31 AM   #18
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Thanks............................................ .........
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Old 09-21-2010, 07:38 PM   #19
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Quote:
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Thanks for the reminder that this feature is not controllable, Joe. I spent some time in a new Corvette Grand Sport last month running it around Black Lake at Milford. This car had the dual mode exhaust and as great as it sounds when it's open in the upper RPM range, I did not like the continual "open & closing, open & closing" aspect of this option. The change in exhaust tone and volume is huge and if I can't control that, then I don't like it so much... to the point where it was getting on my nerves. I love a loud exhaust, but the change back and forth is what bothers me. I would not order this feature on a car.
I have a simple cutout on my 4th gen SS and I guess I'm used to having a consistent (either quieter or louder) exhaust note that I can change as I see fit.
A far less costly alternative to the dual mode system from the factory would seem to be the installation of an electric cutout that can be controlled by the driver from the cockpit.
Just my $0.02.

Best regardSS,

Elie
I've never experienced it. But I imagine you're right. I, and this is personal preference now, think cutouts sound a little 'dirty'. I'd prefer something like the dual mode, with the modification required to control it.

That said...this is basically a vacuum-actuated "muffler delete" from the factory. ~$120 says I can get all that, all the time for MUCH less.


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Well if it isn't controllable from the factory, How does the guy in the video control his? I mean, it can't be that hard right? I think it would be sweet to be able to have two exhaust systems, one for performance and sound and one for smooth quite driving....
It's a modification called "Mild to Wild". It's really hot among the Corvette drivers with the NPP exhaust option.

http://www.southerncarparts.com/corv...tch-p-231.html
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Old 06-07-2013, 08:15 PM   #20
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All the cars I've built were quiet until the throttle opened wide. Stealth is my bag.
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Old 06-07-2013, 08:24 PM   #21
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...and we did CPR to this tired, old thread for what?
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Old 06-07-2013, 09:15 PM   #22
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Holy WOW! lol
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