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Palmer Johnson 170'

The 170' Palmer Johnson is the first of four on going projects with Palmer Johnson Yachts the next Yacht will be the 135' to be sea trialed in the spring of 2011 followed by the next two new 210' Sport Yachts in late 2011 all have been powerd with the new MTU M-93L 16V4000@ 4600 hp. All of the Yachts have been designed with our IEHS Aft Chamber design using a new pipe design.

This has also been other team project with CO.FE.ME Exhaust USA in Miami,Fl. We teamed up with CO.FE.ME Exhaust back in 2008 and this working relationship has worked out great for both our copany's but more so for our clients. Today Von'Widmann designs can offer a full system from turbo to our exit point. We teamed up with CO.FE.ME. do to there understanding of our exhaust technology and also the high quality of workmanship and more important standing by there work both were very important to Von'Widmann Designs.

The above are the upper pipes for the Palmer Johnson 170 by CO.FE.ME. Exhaust USA for more info on CO.FE.ME. Exhaust go to www.cofemeusa.com you will not fine any better workmanship within our industry I can highly recommend this company.

Above: Palmer Johnson 170 at Rybovich Palm Beach, Fl December 2010

----------------------------------------------------------------------------------------------------------------------------------------------------E-mail From Capt Bill Greene: A few years back I came across a white paper from your company on the dangers of removing water from the exhaust could you please repost this paper.

Be happy to repost this report for you Bill:

Above: Sign of Diverting Cooling Water Hot Exhaust & Steam

The Dangers of Diverting Exhaust Cooling Water

The practice of diverting exhaust cooling water has been on going for years in the marine industry . Manufacturers of traditional mufflers need to divert the water in order to avoid excessive backpressure on the engines for which they are managing the exhaust. The baffles and restrictions utilized by these mufflers are used to breakup the sound pulsations and thus reduce the noise created by the exhaust.

Before the advent of today's modern engines this wasn"t a problem. It wasn't necessary for the muffler markers to divert large quantities of water. Today's modern engines are using more cooling water in order to help these modern marvels to burn cleaner. The best example of this swing in exhaust cooling water rates is most apparent with DDC/MTU Series 2000 and 4000 engines. These motors put out more then twice the cooling water of their counterparts of equivalent horsepower. The 1500 hp DDC/MTU Series 2000 engine, for example, puts out over 260 gallons of water per minute. Muffler makers are forced to divert well over 100 gallons of water per minute in order to reach MTU's specification for backpressure ( 21'' H20 ). This marks it more difficult for the marker of risers and water-cooled elbows to cool the exhaust- especially during prolonged low-speed operations.

If the exhaust is not properly cooled, if the water-cooled elbows do not have an adequate supply of cooling water, there is a greater likeihood of catastrophe onboard -exhaust burn -out, or even fire. Entire hulls have burned-up as a result. We seen over the years a number of applications on high-end sportfish boats where the exhaust pipes was blistering from the inside out as a result of the excessive heat due to prolonged trolling. Just try to tell a sportfisherman his boat isn't as safe at trolling speeds!

Numerous insurance agents have told us that one of the most common failure in an exhaust system are the hose clamps. There are a multitude of hose clamps used to connect the hoses used to divert the exhaust cooloing water. Image the impact a hose clamp failure on a hose that is carrying over 100 gallons of water per minute overboard! There aren't any bilge pumps that will help in that situation.

What Was Needed

What was needed was the total re-thinking of the marine wet exhaust system from turbo to exit point. A system that would take 100% of the needed engine cooling water and still meet the engine company's new standards for backpresure. Also other problem most boat builders were facing was space back in the 1970's most sport fish and motor yachts the power was in the 350 to 750 hp range diesels. But by the late 1990s power was increasing three to fore times that amount within the same size hulls so space was also a big issue due to the size of the pipes and mufflers. One of the the issues was builders was just running out of room the new engine power needed more fuel so any space aboard that couls be saved was welcome by most yacht builders.

Most important is meeting backpressure our IEHS Systems are safer because we can take 100% of the exhaust cooling water do to having no restrictions such as baffles. In fact our designs use this cooling water to lower exhaust sound and to lower engine pressure within the exhaust system. You see heat builds pressure so the cooler the exhaust is the lower the pressure is within the exhaust system. Also water is one of the very best ways to lower exhaust sound and the cooler the exhaust the safer your boat is, our view is put the fire out as fast as passable the other benefits no steam in the exhaust. If you are seeing steam as in the above top photo your exhaust is to hot and might be a big problem in the future.

Our systems are the safest, most straightforward method of managing exhaust and it's cooling water in the marine industry today. Build and buy the safest boat you can use one of our IEHS Designs.

Above: What your exhaust should look like cool and free of steam.

Taken aboard 110' Motor Yacht Power MTU 16V2000 series 2000 hp @ 25 knots

Coming Soon

The Next Step in Sport Fish Performance

In Development for over 20 years

By Von'Widmann Designs

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(727) 862 5303

gvw@vonwidmanndesigns.com