Noise canceling material for engine covers?

[loadnet]

What's a good safe product to use to cover the underside of my engine covers.<br /><br />My engine is loud as heck at 3 grand rpm. which is my happy speed.<br /><br />Right now I've got 2 covers constructed of marine plywood with no insulation under them.<br /><br />any ideas?

 

[shadowdwpp]

Re: Noise canceling material for engine covers?

mine seems to have a black foam underneath<br /><br />I found this list about marine foams that might help you<br />Buoyancy Foam Buoyancy vests, all floatation <br />PE (various densities) Seals, Gaskets, Packaging, Gym Mats, Marine Cushion, Anti-Vibration, Insulation, Shoe Insoles, Body Boards <br /> EVA (various densities) As Above but More Resilient than PE. Excellent for Boat Seating, Sander Backing, Underlay <br />XLPE Economy boat seating, gym floors, automotive linings etc.

 

[loadnet]

Re: Noise canceling material for engine covers?

Thank you for that info.. <br /><br />I know there are many kinds to choose from but sometimes it's nice to hear from someone who has tried out a few and found one to be the quietest.

 

[cobra 3.0]

Re: Noise canceling material for engine covers?

I'd try those high density blue foam sleeping mats used for camping. They're cheap and are great sound insulators.

 

[Trent]

Re: Noise canceling material for engine covers?

Some of this stuff works really well.<br /><br /> web page

 

[loadnet]

Re: Noise canceling material for engine covers?

Thank you. I'm reading the death out of the sources you guys have provided me with.<br /><br />Appreciate it very much.<br /><br />PB

 

[llerrad]

Re: Noise canceling material for engine covers?

Soundcoat. it is a product used for heavy equipment and machinery we use it for the making of production machines. I have used it on the engine box to my rig and sound is greatly reduced, it's what it is made for.<br />Grey high dense foam with sticky back and made by Soundcoat on the web somewhere.

 

[Northern Eclipse]

Re: Noise canceling material for engine covers?

CHF Just make sure whatever you use that it is flame retardent..But just to add to your list, the engine box for my Wellcraft is fiberglass about 1/2 inch thick, it seems to do a fair job up to about 4000rpm

 

[loadnet]

Re: Noise canceling material for engine covers?

Thanks for that Soundcoat info. <br /><br />NE.... my friend's boat is a Wellcraft which is the one that had the stuck valves I posted about and those fiberglass covers are 50 percent quieter than my 5/8 marine plywood covers, plus the interlock with one another sealing the center crack up nice.<br /><br />amazing how quiet the Wellcraft is compared to the 76 240 Searay FB Sedan.

 

[snapperbait]

Re: Noise canceling material for engine covers?

Look up "The Insulator" and "Super Insulator"... Certainly the most cost effective solution...<br /> http://store.summitracing.com/defau...word&searchtype=both&part=insulator&x=18&y=10

 

[Northern Eclipse]

Re: Noise canceling material for engine covers?

CHF I forgot to add to my last post.. that maybe using your existing plywood box, you can Glass over it then with micro ballons added to your resin you can make a putty and smooth coat the outside of the box and paint it, it would make a good winter project.. or you can pad the box with a high density foam and cover with vinyl.

 

[CRT Skiff Crafter]

Re: Noise canceling material for engine covers?

Hi Captain HooknFinger.<br /><br />Thought I'd throw in my 2 cents. I used to earn my living in the music business, but today it's merely a hobby. However, I am an avid collector and user of vintage recording gear and I have a pretty serious recording space in my house. <br /><br />For sound absorption, you can't beat convoluted foam such as the acoustical foam panels you find used extensively in recording studios. The stuff is advertised as being flame resistant and should be fine for marine use. <br /><br />Here's a source for information purposes<br /> http://www.acousticalfoampanel.com/. <br /><br />Hope you find some value in this information.<br /><br />Regards, crt.

 

[Bondo]

Re: Noise canceling material for engine covers?

Well, Here's Another 1 of My Silly Ideas.......<br />(the Soda Bottle Floatation in the bilge is still the Best..Drains Beautifully..)<br /><br />When I started rebuilding the engine hatch, side panels,gunnel curtians, etc... I Stumbled onto Packing Foam... The White stuff that's various widths.. about 1/8" thick.. closed-cell, will Not hold water... FREE at All Jobsite Dumpsters...<br />I stapled/sewed it into everywhere I wanted Sound/Heat Insulation.. Multipule layers in places... It also gives the side panels that Puffed Upholstry look... My plywood engine hatch has it stapled to Both the inside + out(Under the vinyl)... With the exception of where a pulley rubbed it, the inside has over 500hrs on it, with No degradation.....

 

[mabbott]

Re: Noise canceling material for engine covers?

I used a product by www.soundown.com They have it in various thickness's and syles.

 

[FIN-FEVER]

Re: Noise canceling material for engine covers?

Yes, a noise insulation is available from some outlets(boaters world? paxton?) Im not sure which or were right now but it needs to have a foil surface or at least a surface that WILL NOT ABSORB FUEL OR FUEL VAPORS!!!!!!!!

 

[conimicut1]

Re: Noise canceling material for engine covers?

check out dynamat, i think its fire resistant, anything you use should be

 

[andrewgroup]

Re: Noise canceling material for engine covers?

Here is the product I used and am 1000% satisfied.<br /> http://www.earsc.com/HOME/what'snew/index.asp?SID=3&news_id=42 <br /><br />It's high density foam, foil backed, heat resistant, easy to work with and comes in rolls, sheets, etc. After building my new engine cover, I've installed this using contact cement.<br /><br />They have sales office and reps that can get samples, or complete stuff. I also glued this in other areas of the boat to absorb noise...Back of rear panels next to engine.<br /><br />Rule is..Density absorbs noise, you can get desity reports on all foams. This stuff is also used in Military applications around Helicopter engines, jets etc...Great Stuff by experts in noise products. Sister company is the company that makes all those yellow ear plugs...EAR corp.<br /><br />Good Luck..

 

[cobra 3.0]

Re: Noise canceling material for engine covers?

Andrew T, the stuff looks like camp matress foam!<br /><br />It's probably the same stuff.

 

[loadnet]

Re: Noise canceling material for engine covers?

OK.... I thank everyone for their 2 cents on my request for the best noise killing material around.<br /><br />Now does anyone know a good marrige counseler?<br /><br />I got so much neat stuff off this board, I ended up attaching it to the house washing machine, dish washer, her hair dryer, the micro wave oven, pots and pans, high heel shoes etc. and my wife now wants to kill me and all you people on this board that helped me out so any of you that have your address's listed with your profiles better get em off of there QUICK! <br /><br />Take care, and thanks to all.<br />Pat customerservice@401hosting.com