Dynamat applied to engine hatch

[lostisle]

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[HUMPH]

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Hey there, how did that work for you to cut down the noise? I wouldn't mind trying to quiet down the rumble of the Cats for a more peaceful ride. How are the folks?

 

[SeaNile]

How does it compare to Soundown?

 

[lostisle]

Hey there, how did that work for you to cut down the noise? I wouldn't mind trying to quiet down the rumble of the Cats for a more peaceful ride. How are the folks?

It's extremely quieter, the next step is to apply the dynamat hoodliner product to the dynamat. The dynamat xtreme and dynamat hoodliner are a huge improvement over the factory foam. Needed to do this because I have installed 6inch risers to prevent any water intrusion and they pressed against the factory foam and cause the hatch to rise up a bit. With the factory foam removed and dynamat applied it closes perfectly. I'll end up trimming the hood liner heat shield foam around the area where the risers hit.

Mom and Dad are good - we rafted up together last week with a buddy of mine I just got into a 06 260 dancer.

I'm ready for the bay this year Humph!

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[JimFromMD]

Hmm... I've been wondering how to quiet my generator because on the 300DA it sits right below where the aft-facing bench/seat is. When it's running its now excessively loud in the cockpit, but it is for sure louder than a friends 09 270DA where the generator is actually tucked back under the cockpt floor a bit more.

Did you install the dynamat on the silver outer cover of the factory foam (removing the foam only where your new risers were) or did you remove all the foam and put the dynamat directly on the underside of the bilge hatch? Going only from memory... I'm thinking you removed all the foam because I dont remember the pedestal mount sticking out as far in my boat, and I'm thinking my hatch actuator is a bit recessed within the foam. Yours looks flush.
Great info, and will be watching for more!

 

[lostisle]

Hmm... I've been wondering how to quiet my generator because on the 300DA it sits right below where the aft-facing bench/seat is. When it's running its now excessively loud in the cockpit, but it is for sure louder than a friends 09 270DA where the generator is actually tucked back under the cockpt floor a bit more.

Did you install the dynamat on the silver outer cover of the factory foam (removing the foam only where your new risers were) or did you remove all the foam and put the dynamat directly on the underside of the bilge hatch? Going only from memory... I'm thinking you removed all the foam because I dont remember the pedestal mount sticking out as far in my boat, and I'm thinking my hatch actuator is a bit recessed within the foam. Yours looks flush.
Great info, and will be watching for more!

Hi Jim,

I removed all the factory foam from both sides of the hatch. Cleaned everything with some acetone then began applying the dynamat as close as possible to the edges do the hatch. The product is really easy to apply and roll out with the rolling tool they recommend. There's no way this stuff is coming off. It's definitely quieter then the foam only and I expect an even greater reduction in sound when I apply the dynamat heat shield over the already laid dynamat.

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[JimFromMD]

Hi Jim,

I removed all the factory foam from both sides of the hatch. Cleaned everything with some acetone then began applying the dynamat as close as possible to the edges do the hatch. The product is really easy to apply and roll out with the rolling tool they recommend. There's no way this stuff is coming off. It's definitely quieter then the foam only and I expect an even greater reduction in sound when I apply the dynamat heat shield over the already laid dynamat.

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My Foam is in really good shape. Do you think it would stick to the metalic coating that's on the foam or do you really have to press down on it with the roller to get it to stick?

You said both sides of the hatch... Im assuming you meant left and right side? Mine hatch is one solid piece and only has foam underneath. No dividers that I can recall. Funny the things you dont pay attention to until you are really trying to picture it in your head!

 

[lostisle]

My Foam is in really good shape. Do you think it would stick to the metalic coating that's on the foam or do you really have to press down on it with the roller to get it to stick?

You said both sides of the hatch... Im assuming you meant left and right side? Mine hatch is one solid piece and only has foam underneath. No dividers that I can recall. Funny the things you dont pay attention to until you are really trying to picture it in your head!

Correct, left and right sides. The dynamat will stick to the existing foam but that's not how you want to apply it. You should be able to remove the existing foam, apply the dynamat everywhere you can then reapply your old foam with some spray adhesive. Yes you'll loose a little bit of foam here and there when you remove it but it will all be on the underside of the metallic heat shield and shouldn't make a difference.


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