[C320-list] Engine compartment sound proofing

[Jeff Hare]

Interesting idea.  I'll take readings with covers on and off.  Since ours are insulated, that's the best we can do there but it will provide a good reference assuming we're all measuring from the same places.

Perhaps one reading standing at the compression post and another reading standing in front of the binnacle in the cockpit?

-Jeff 

-----Original Message-----
From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of John Meyers
Sent: Monday, June 23, 2014 12:25 PM
To: C320-List at catalina320.com
Subject: Re: [C320-list] Engine compartment sound proofing

If someone is going to do this it might be interesting to download a decibel reading onto your smart phone (I have Sound Meter Pro by Smart Tools Co. - FREE) and take readings before and after the insulation is installed. I suppose I could do that with and without my insulated covers, but the covers themselves to cut out some of the sound.

John Meyers
Muskegon
#406





On Mon, Jun 23, 2014 at 12:29 AM, Gary Magnuson <gary.magnuson at frontier.com>
wrote:

> I used the product from Sailors Solution and have been very happy with 
> the results.. I bought Time A Weigh in the fall of 06, and brought the 
> engine covers home and added the insulation over the winter.  I have 
> never heard the engine without it, so I cannot attest to the amount of noise
> reduction...   Hope that helps..
>
> Gary Magnuson
> Time A Weigh  #205
>
> On 6/22/2014 10:22 AM, Kaare Wold wrote:
>
>> I am interested in proceeding with this project to quiet down the 
>> rattlecan Yanmar.  I do have some concerns with using a plain Home 
>> Depot ceiling tile that is not  designed to function in an enclosed 
>> engine environment.  Would appreciate some feedback on the following question.
>> Have you owners insulated just the front engine cover or did you 
>> insulate both the front and rear?  Thanks for your comments.
>> Kaare Wold
>> Sheet Music #945
>> ----- Original Message ----- From: "Jeffrey Brown" 
>> <oceanblues at mac.com>
>> To: <C320-List at Catalina320.com>
>> Sent: Thursday, June 19, 2014 6:54 PM
>> Subject: Re: [C320-list] Engine compartment sound proofing
>>
>>
>>  Someone on this forum suggest ceiling tiles, which I did and it 
>> worked
>>> great and cheap.
>>>
>>> Jeff Brown
>>> 949-350-5123
>>>
>>>  On Jun 19, 2014, at 4:14 PM, Jeff Hare <Catalina at thehares.com> wrote:
>>>>
>>>> Hi Bill,
>>>>
>>>> Around 2003 I installed sound proofing in our engine compartment 
>>>> and it made a big difference.  Mostly it cuts down the harshness 
>>>> and does drop the volume significantly.  But it won't be "quiet".
>>>>
>>>> I used the 1" West Marine which is a moderately dense foam with a 
>>>> lead-like layer in the middle to help hit multiple frequencies.
>>>>
>>>> I was able to do it in an hour or so.  Even today the adhesive is 
>>>> showing no signs of letting go.  You peel the backing off and give 
>>>> it a certain amount of time before you stick it on, but recall it 
>>>> was quite easy to dry fit and cut with a razor knife.  I purchased 
>>>> the "kit" which came with some silver seam tape and some metal 
>>>> plates with pin supports that they say to use for overhead spans, 
>>>> but they're  not strictly necessary on our engine covers because 
>>>> there is so little area to support.  I think I used one on the 
>>>> front cover and none on the aft cover.  Both are fine today.
>>>>
>>>> Incidentally, if you use 1" on the Front (galley side) engine 
>>>> cover, the lower pulley may just touch the insulation.  The trick 
>>>> here is to go ahead and install the cover and run the engine.  It's 
>>>> just the very bottom of that pulley that might rub just a tiny bit.  
>>>> When you stop the engine you'll see if and where it rubs and can 
>>>> either leave it or carve out a tiny bit.
>>>>  It
>>>> really won't hurt anything.  You won't be able to use anything 
>>>> thicker than 1" on the front.
>>>>
>>>> Also, if you purchase a roll of the 1/2" version, you can use it to 
>>>> stick on the fridge side to keep the engine from melting your Ice 
>>>> Cream.  :)
>>>>
>>>> If I were to do it again, I'd still go this route.  I considered 
>>>> the Tiles, but it was a lot more piecing together and more seams.  
>>>> With the rolls of stuff, you can cut and install the overhead piece 
>>>> first, then butt the sides up tight to it and it helps hold the 
>>>> edges in place.  I cut mine so that each cover just used one single 
>>>> piece (including the top), so that's an
>>>> option too.   The first thing you'll notice is how much heavier the
>>>> covers
>>>> got.  The second thing is that the harshness is down considerably.
>>>>
>>>> Avoid the sound deadening paint scam.  It's a joke and doesn't work.
>>>>
>>>> Two pictures of the Job using the West Marine kit.
>>>>
>>>> http://tinyurl.com/EngineInsulation1
>>>> http://tinyurl.com/EngineInsulation2
>>>>
>>>> Good luck!
>>>>
>>>> -Jeff Hare
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On 
>>>> Behalf Of Bill Hutt
>>>> Sent: Thursday, June 19, 2014 5:53 PM
>>>> To: C320-List at Catalina320.com
>>>> Subject: [C320-list] Engine compartment sound proofing
>>>>
>>>> Ok, new thread.
>>>> I'm looking at a product from Sailorssolutions.com called SPM. It's 1"
>>>> thick
>>>> self adhesive tiles. Has anyone tried this with good results?
>>>>
>>>> Bill Hutt
>>>>
>>>>
>>>> Sent from my iPad=
>>>>
>>>>
>>
>