Roberta's Torpedo

Designs for inboard or outboard power

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flordia boy
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Re: Roberta's Torpedo

Post by flordia boy »

thats a great article...W.

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rbrandenstein
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Re: Roberta's Torpedo

Post by rbrandenstein »

If you click the "Next" link at the top of the article you see the additional pictures.

It's great to see the "family" make national press. A star is born.
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Completed Malahini (launched 6/24/2012)
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Roberta
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Re: Roberta's Torpedo

Post by Roberta »

Thanks, Bob!!! I did not realize that!!

Roberta :D :D :D :D :D
Roberta "Queen of the Boat Builders"
Built Zip "Oliver IV", Super Spartan "Jimmy 70", and Torpedo "The Glen L".

slug
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Re: Roberta's Torpedo

Post by slug »

Hi Roberta; Don't know if this is of any interest to you, but I am currently planning my exhaust system on the Gentry. I've decided to go with .060 stainless tubing (only 3" though, same as on the donor boat ) with marine rubber elbows. Seems to be the most economical choice for me. Tubing is about $10 per foot and elbows around $22 each. They are available in 90 and 45 degree. Any minor bends (to fit under the side decks) can be accomplished with rubber tubing.
.
Doug

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billy c
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Re: Roberta's Torpedo

Post by billy c »

slug wrote:Hi Roberta; Don't know if this is of any interest to you, but I am currently planning my exhaust system on the Gentry. I've decided to go with .060 stainless tubing (only 3" though, same as on the donor boat ) with marine rubber elbows. Seems to be the most economical choice for me. Tubing is about $10 per foot and elbows around $22 each. They are available in 90 and 45 degree. Any minor bends (to fit under the side decks) can be accomplished with rubber tubing.
.
Doug
Doug/Roberta
...do you need to plumb in a ski boat type of muffler? we need that to pass the decibel laws in NH
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Roberta
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Re: Roberta's Torpedo

Post by Roberta »

The 0.060 tubing sounds like a good idea. Post some pics of your system. I was thinking of using some sort of muffler or silencer just to keep the cops at bay.

Roberta :D :D :D :D
Roberta "Queen of the Boat Builders"
Built Zip "Oliver IV", Super Spartan "Jimmy 70", and Torpedo "The Glen L".

bob smith
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Re: Roberta's Torpedo

Post by bob smith »

I used SS tubing to make a tight bends out of the exhaust manifolds. I wrapped them with hi-temp exhaust wrap (Summit Racing/Jegs). It works great/stays cool.
The smooth walls make for good flow around the bend. The rest is corrugated rubber exhaust hose and neoprene mufflers.
Bob Smith
Chester, SC

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jenko
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Re: Roberta's Torpedo

Post by jenko »

I used 3'' 316 stainless 0.120" and machined .030 groove to seat silicone tube used the 90 deg prefab bends and cut to suit angle needed ( thicker pipe makes for quieter exhaust double the weight but security of hoses not slipping off)then weld.and there is in pipe silencer baffles available ,and with your 4" pipes they will not adversly affect performance with your engine
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jenko
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Re: Roberta's Torpedo

Post by jenko »

here is the link for the slip in silencershttp://www.keitheickert.com/p-12622-4-s ... encer.aspx

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Roberta
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Re: Roberta's Torpedo

Post by Roberta »

You guys are giving me some great ideas!! Keep um coming!!

Roberta :D :D :D :D
Roberta "Queen of the Boat Builders"
Built Zip "Oliver IV", Super Spartan "Jimmy 70", and Torpedo "The Glen L".

slug
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Re: Roberta's Torpedo

Post by slug »

No pics yet....still planning stage.
Doug

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Roberta
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Re: Roberta's Torpedo

Post by Roberta »

I'm thinking those Blue High Temp elbows and bellow connectors with SS tube between with a slip in silencer or shorty muffler would be good.

Once I get the engine in, I'll have to size things up.

Roberta :D :D :D
Roberta "Queen of the Boat Builders"
Built Zip "Oliver IV", Super Spartan "Jimmy 70", and Torpedo "The Glen L".

neel thompson
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Re: Roberta's Torpedo

Post by neel thompson »

If you have the room Roberta, the fiberglass wet mufflers work great and give you that nice V8 sound. I have two of them in my Gentry so I am sure they will fit in the Torpedo. I would guess they are about 18" long and 12" diameter. They may have a smaller version. You can get them for all of the different size exhaust hose. Also, I used all fiberglass exhaust fittings (elbows and reducers) with regular rubber exhaust hoses. This is not a great picture, but you can get the idea. Neel
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billy c
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Re: Roberta's Torpedo

Post by billy c »

the inline ski mufflers work sound great, can run oustside the stringers and pass the db laws
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trisailor
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Re: Roberta's Torpedo

Post by trisailor »

I have a friend who works in the HVAC field and he gave me the straight lengths of the copper needed for my system (I had to buy the elbows). The pipes coming right out of the engine are a nice foot warmer in the fall. Not too hot, not too cold. In the summer, there is enough air moving as not to notice they're even there. Everything is brazed with Sil-fos. So far the constabulary has been kind to me, but after two seasons of unmuffled exhaust, I may consider quieting that wonderful throaty sound, so I can have a conversation at 1800 rpm.
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