Exhaust Too Loud
05-30-2006, 12:49 PM
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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.
Thanks
Thanks
05-30-2006, 02:09 PM
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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.
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.
05-30-2006, 04:03 PM
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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
05-30-2006, 04:52 PM
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Re: Exhaust Too Loud
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
Rob
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06-05-2006, 04:00 PM
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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??
