air cooled engine exhaust.

uprr created the topic: air cooled engine exhaust.

The current boat I'm building has an air cooled engine in it and the exhaust points downward towards the inside of the hull( right at the radio box) I'm planning on useing some copper pipe fittings for now ( until i get something watercooled) I mainly just want to get the heat out of the hull. Any other ideas?
#4160

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Scott replied the topic: Re:air cooled engine exhaust.

Copper is EXTREMELY conductive too heat adding much more heat to the surrounding area than either aluminum or steel.

but if you must? .... wrap it all IN HIGH TEMP silicone wrap :woohoo:

If your going to solder up the exhaust parts, do so with at least a 10% silver solder, 15% best IMO
2 stroke Engine Tech of 30+ years, Prop tweeker, Chronic tinkerholic, Home of Motor Heads RC Racing Engines ...
8 time NAMBA National 6 lap heat racing record holder.
#4162
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uprr replied the topic: Re:air cooled engine exhaust.

Would brass work alright?
#4165

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Scott replied the topic: Re:air cooled engine exhaust.

Neither brass or copper are the right material under this amount of heat.

Copper is the better choice, brass will anneal then work harden where it starts to flex breaking shortly their after :blush:
2 stroke Engine Tech of 30+ years, Prop tweeker, Chronic tinkerholic, Home of Motor Heads RC Racing Engines ...
8 time NAMBA National 6 lap heat racing record holder.
#4167

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marc replied the topic: Re:air cooled engine exhaust.

Let's see a picture of your setup and exhaust...some mufflers can simply be flipped around.
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#4172

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uprr replied the topic: Re:air cooled engine exhaust.

Here's a pic of my set up. Just getting into full gas and haveing a blast learning from you guy's!!
#4173
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dkf replied the topic: Re:air cooled engine exhaust.

You can just put a 45 degree or so copper elbow on it and that should solve your problem. Warehouse Hobbies also makes a canister that will fit the zenoah that isn't too expensive and has two stacks that point straight up.

Under pic and mono Look at the red boat in the first two pics. Thats setup is another option.
www.insaneboats.com/index.php?...e&Itemid=32
#4175

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marc replied the topic: Re:air cooled engine exhaust.

You can also get a steel 45 or 90 deg fitting and braze it on. Also as mentioned there are aftermarket mufflers with top stacks...performance will be a little bit better as they use 2 stacks. The Team Gonads muffler is another example...a little pricey though, but a nice piece.
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#4179

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uprr replied the topic: Re:air cooled engine exhaust.

Made this sort of exhaust to solve my problem. can you tell what it's made of? If you guessed rv faucet your right!! Brass internal with thick chrome outer shell. Does the job and its CHROME!!! OH AH Not the ideall set up but I think it'll work, what do you think?
#4271
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