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Exhaust Too Loud

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Old 05-30-2006, 01:49 PM
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Default Exhaust Too Loud

We seem to have an exhaust issue for some folks (mainly DNR) and need to quiet it down some. We boat mostly inland water so it is getting to be more of an issue each year. What are some recommendations for an easy slip in "insert" that will do the job without too much power loss.
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Old 05-30-2006, 03:09 PM
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Default Re: Exhaust Too Loud

We offer a very nice clamp on or a thru hull mounted muffler:

CMI Sound Elimination Systems mufflers are the next generation of sound reduction technology form CMI. These mufflers enable boaters to operate their performance boats in stealth mode by reducing sound emissions to levels as low as 85 decibels (dB) -- a level well below the most strict sound emission regulations. CMI's Sound Elimination Systems mufflers are designed to curtail exhaust noise emissions on any marine exhaust system with tailpipes ranging from four to six-inches in diameter, which covers the full range of inboard or stern drive-powered recreational and performance boat applications up to 1500 horsepower. The mufflers are strategically engineered to muffle sound without restricting the exhaust or creating unwanted backpressure, which can inhibit the engine from reaching peak performance power. A superior design results in fewer parts than competitive models, which will ensure long-lasting durability and reliability for marine applications.

Give us a call if we can help.
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Old 05-30-2006, 05:03 PM
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Default Re: Exhaust Too Loud

Everything I have read says cheap slip in inserts will lower noise 8-12 decibles along with a 200-300 rpm top end drop.I am using ggb external clamp-ons,although they are around 800$ a engine,I saw zero power/rpm loss on a big hp motor and boat is reasonably quiet,Smitty
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Old 05-30-2006, 05:47 PM
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Default Re: Exhaust Too Loud

Glad those have been working for you Smitty. It's the most popular muffler in this area by far.
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Old 05-30-2006, 05:52 PM
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Default Re: Exhaust Too Loud

Quote:
Originally Posted by articfriends
Everything I have read says cheap slip in inserts will lower noise 8-12 decibles along with a 200-300 rpm top end drop.I am using ggb external clamp-ons,although they are around 800$ a engine,I saw zero power/rpm loss on a big hp motor and boat is reasonably quiet,Smitty
Smity ya got a pick??? and do they make a switchable one???

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Old 06-05-2006, 07:36 AM
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Default Re: Exhaust Too Loud

No such thing as too loud.............
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Old 06-05-2006, 04:56 PM
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Default Re: Exhaust Too Loud

Quote:
Originally Posted by littlenige
No such thing as too loud.............
I agree.
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Old 06-05-2006, 05:00 PM
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Default Re: Exhaust Too Loud

Are the GGB's the same design as the HPI's?? They look the same in photos. I installed the HPI's (transom mount)on my Top Gun last year. They seem to work pretty well but I don't hear too much press about them. Did HPI go out of business??
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Old 06-05-2006, 10:08 PM
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Default Re: Exhaust Too Loud

Quote:
Originally Posted by littlenige
No such thing as too loud.............
I'm with you....but the noise Gestapos don't always see it that way.
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