PDA

View Full Version : New Performance Muffler



Seadog
03-03-2005, 08:48 AM
Saw this and thought it might interest a few here.
...Custom Marine, Incorporated (CMI) announced it will introduce a revolutionary new exhaust sound suppression system designed to dampen exhaust noise emissions on all inboard and stern drive powered recreational and performance boats....
This innovative system, Liquid Sound™, will lower exhaust sound emissions to as low as 79 decibels (dB) on most high performance boats – a sound level nearing that which represents normal household appliances – without robbing horsepower from the engine.
“We spent nearly two years of research and development time to develop a revolutionary sound suppression system that would meet regulatory requirements without inhibiting the power recreational and performance-oriented boaters demand from their marine propulsion system,” said Joe Zelinski, founder and president of CMI. “Our initial decibel target for this project was to achieve a level of sound that was below the most common sound regulation, which is 86 dB. With Liquid Sound, we have exceeded our own expectations.
“Liquid Sound can be applied to any inboard or stern drive exhaust system,” Zelinski added, “With Liquid Sound, recreational and performance boaters alike will experience much lower sound decibel levels from their exhaust system – as much as nearly 25 percent less than sound levels common with many straight-pipe systems – making their overall on-water experience more enjoyable.”
The CMI Liquid Sound system reduces noise by directing exhaust gasses through a high-tech chamber filled with water, which eliminates a direct path for sound waves to travel. This design allows an unrestricted flow of exhaust gas to pass through the chamber without creating the power-robbing backpressure common to most muffler designs. CMI will offer Liquid Sound in both In-Water and Above-Water configurations to meet any marine engine application.
The Liquid Sound, In-Water model provides a sleek and stylized look and is designed to be mounted directly to the outer transom wall. This model directs exhaust gasses to a port located below the surface of the water, which muffles sound while operating at idle or low speeds in close-quarter areas like marinas or other high traffic areas. Away from shore and on-plane, the system allows the open exhaust sound that many performance enthusiasts demand.
The Liquid Sound, Above-Water model is similar in design to the In-Water model; however it provides full-time sound suppression during operation. This model can be mounted on the outside transom wall or inside the engine compartment if room allows. This system will be a popular choice for recreational boating applications where the boat is operated near more populated areas or where regulations demand full-time noise suppression.

prosthogod
03-03-2005, 10:28 AM
I went to their website and couldn't find anything on this. I haven't bought mufflers yet and am doing my research now.

malibuken
03-03-2005, 11:18 AM
Almost sounds like the water boxes Jet Skis had from back in the 80s.

hotlavey
03-03-2005, 12:41 PM
They don't have a muffler yet for engines over 500hp. They are working on them. Boy, are they ugly.