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Old 02-16-2011, 03:19 PM   #1
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What exactly is dual mode exhaust ?

What exactly is dual mode exhaust ? Are we going to push a button and the exhaust opens up ?
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Old 02-16-2011, 03:21 PM   #2
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It is bi-modal and it is operated by a hydraulic control. Essentially, at 3500 RPM the valve automatically opens to partially bypass the mufflers and make it a 'straight back' exhaust, giving more free-flow and sound for spirited driving.

You can get a 'mild to wild' remote that will keep the butterfly valves open at all times, though
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Old 02-16-2011, 03:55 PM   #3
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An even cheaper way is to just remove the fuse and it'll stay open all the time.
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Old 02-16-2011, 03:57 PM   #4
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Hmm.... I like it !
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Old 02-16-2011, 03:59 PM   #5
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Quote:
Originally Posted by Ron66Vette&10SS View Post
An even cheaper way is to just remove the fuse and it'll stay open all the time.
But you get drone below 2000 RPM while cruising. It's best left closed until RPM goes over drone frequency.
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Old 02-16-2011, 05:56 PM   #6
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Quote:
Originally Posted by DroptopZ View Post
It is bi-modal and it is operated by a hydraulic control. Essentially, at 3500 RPM the valve automatically opens to partially bypass the mufflers and make it a 'straight back' exhaust, giving more free-flow and sound for spirited driving.

You can get a 'mild to wild' remote that will keep the butterfly valves open at all times, though
sorry not by hydraulic ..it's vacuum that opens the valve.
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Old 02-16-2011, 06:04 PM   #7
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Essentially it allows the car to meet the Noise Pass By test. Under 80 dB now if I recall correctly at some speed like 60 mph. But on WOT or heavier accleration, the dual system allows for a much more open exhaust. The Corvette gets a few extra HP from that exhaust.

And I agree, driving the Z06 or even a base Corvette with the Dual Exhaust on the highway with the fust pulled is pretty much annoying. Having a switch to the circuit would allow for more control.
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Old 02-16-2011, 06:57 PM   #8
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I have the noweeds kit and it's awesome when I want the dumps open, but I would not want them open all time.
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Old 02-16-2011, 06:59 PM   #9
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An even cheaper way is to just remove the fuse and it'll stay open all the time.
nice, the louder the better
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Old 02-16-2011, 07:14 PM   #10
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bi mode exhaust is pretty much the most badass thing since sliced bread.

I absolutely hate cut outs and "diverters" but I LOVE the bi mode exhaust on the corvette and now the ZL1
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Old 02-16-2011, 07:28 PM   #11
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It don't have to be loud and obnoxious to be fast and a killa. If anything stealth is mo' betta'.
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Old 02-16-2011, 09:18 PM   #12
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Quote:
Originally Posted by danhr View Post
bi mode exhaust is pretty much the most badass thing since sliced bread.

I absolutely hate cut outs and "diverters" but I LOVE the bi mode exhaust on the corvette and now the ZL1
That's because it's factory.
(sorry...inside joke with myself...I've been touting factory equipment so much lately....)

Love the dual-mode exhaust...so friggin' cool they decided to include it as part of the ZL1's formula!
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Old 02-16-2011, 09:22 PM   #13
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nice, the louder the better
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Old 02-16-2011, 09:23 PM   #14
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i am kind of confused. so when its open its sounds like a muffler delete ?
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