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westridge
westridge

Posted: Thu Jul 01, 2010 7:21pm

Post Subject: lister SR3 exhaust system

I intend to fit a lister sr3 into my new boat. the engine is going to sit in its own room. I have been think about the best way of fitting the exhaust, either through the root or out the side. The other issue is what type/size of silencer to fit, could i fit a hospital type to reduce noise ? or am i also conscious that being air cool its going to be a little noisey thanks Gary

Tony-B
Tony-B

Posted: Thu Jul 01, 2010 10:09pm

Post Subject: lister SR3 exhaust system

If this is a mid-engine room then I would say through the roof because that's the traditional way. However make sure you have a rain cap of some sort on it whenever the engine is not running. You should the have enough room t easily install a hospital silencer if that is what you want. However I suspect most of the exhaust noise will be directed upwards so it will be quieter for the helm than a side exit - that is apart from when you are in a tunnel or under a bridge. I am not sure I would apply "little noisy" to an air cooled Lister and you will have to ensure adequate engine room ventilation. That will probably be a side door to let the air in (and noise out)plus a small opening dog box on the roof terminating a vertical hot cooling air outlet duct. I do not think venting the cooling air into the engine room is a very good idea. Tony Brooks

westridge
westridge

Posted: Thu Jul 01, 2010 10:59pm

Post Subject: lister SR3 exhaust system

Thanks Tony, Yes i do have two large doors 24" X 20" each side and also two vents 10"X 5" i did intend to put a pigeon type box on the roof to take away the hot air. thanks again Gary

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