"Sound" advice needed!

[rwthomas1]

Hello All,
I'm in the process of R-n-R'ing the 5432 in my E38 with a used engine. In the process of removing the engine several other things are receiving attention including the lack of sound insulation.

There is essentially NO sound insulation on my boat. The factory stuff was only installed on the access door under the companionway steps. Needless to say the boat could be quieter when motoring. I would like a recommendation for sound insulation to install on the sides and ceiling of the engine space while I have the engine removed. I have seen several types, stick on, cut to fit, tiles, screw fastened, etc.

Thanks in advance, RT

 

[Chris A.]

Here are a couple of links from when I was researching the topic.

acoustic insulation

acoustic insulation

all noise control

sound sense

Mcmaster Carr


Here is what I ended up going with:

Hamilton Marine sound barrier

It was the heaviest product at Hamilton. I used the self adhesive, but also used the mechanical fasteners you see in the second link.

Good luck with your project!

 

[ted_reshetiloff]

I used 1 1/2" Thick Sound Down. Defender sells it. They also sell the hanger kits. Stuff was a beast to work with as it has this 1/4" think internal layer of lead impregnated rubber. You will want a pair of big ass shears to cut the stuff. Also get the tape to seal the corners and ends. I did this with the engine in and it was a royal PITA. You should have an easier go at it. I tried to make the engine box as close to air tight as possible with a blower pulling heat off from the top of the box and a fresh air intake plumbed into the bottom. Made a huge difference in noise but the Sounddown is not cheap. Glacier Bay I think makes some really expensive stuff too.

http://www.soundown.com/index_Marine.htm

 

[rwthomas1]

Thanks much. Will do some form of mechanical fastening even with the self adhesive stuff. Since the engine will be out the whole deal should be MUCH easier. I'm going for 1" thickness, max. Any more than that and getting all the stuff on the engine space walls bolted back on will be difficult. I realize that the thinner material may not work at effectively however I plan on doing almost all the area and I have NOTHING on the walls now. Anything will be a huge improvement.

RT

 

[wheelerwbrian]

I have to replace my fuel water separater, and while its out, it seems like a good time to replace the crumbling sound insulation. I'm using SPM tiles from sailor solutions http://www.sailorssolutions.com/index.asp?page=ProductDetails&Item=SPM01 . I'm doing it this weekend, now that we have some decent weather in the Chesapeake. I'll let all know how I like it.

 

[rwthomas1]

I ordered this stuff: http://www.cyber-bridge-marine.com/...sulation-Barrier-1-In-54-In-X-96-In-1-Lb.html The price is excellent considering that is 36sq/ft of material. I have plans for the excess.... RT

 

[ted_reshetiloff]

Looks identical to the Sound Down I paid a lot more for. Good find!

 

[Sven]

Line the hull too ?

We only have very basic insulation under the engine box and a loose sheet in one access door. The noise doesn't bother us that much but quieter would still be nicer.

I am wondering if any of your installations also cover some of the contours of the inside of the hull to cut down reverberations ?

Any suggestions about how to cut down the noise from a very noisy (rattly) squirrel fan ? Mount to a sheet of rubber or wrap in foam ... or ?



-Sven

 

[rwthomas1]

FWIW, the product I received is Soundown brand. Thats 36sq/ft for much less per sq/ft than anywhere else I have seen.

RT

 

[ted_reshetiloff]

Sweet RT, Soundown is very well made stuff. I found I needed a BIG pair of scizzors to work with it easily but it held up well. The tape for the seams and ends has held up well too.

While I have your attention, it looks like I am buying a boat in Portsmouth, RI. Stored at the Hinckley yard. I may be looking for someone to do some work on it there for me. Replacing some hoses on the engine, and replacing some seacocks. I'm not accustomed to paying people to work on my boats but given the logistics of me being in Annapolis some of these jobs will make sense to pay for. Can you reccomend anyone who is good and reasonably priced in the area? p-mail me if its easier ted_reshetiloff@yahoo.com

 

[Dan Morehouse]

sound insulation

Rob,
I am using SPM tiles from Sailors Solutions. Have less than half of it installed (the easy half, unfortunately) but it has made a modest difference. With the engine still in, I will next have to figure out how to install the remaining pieces around the obstructions in the engine space (wiring harness, bilge & water pressure pumps, etc.). Whatever time it takes to extend your engine install in order to install insulation will be well worth it!

Dan Morehouse
1981 E-38 "Next Exit"