Sound deadening material?

[Greg_SA]

Doesn't most of the noise come from the exhaust - what about a fresh air exhaust (FAE) system?

[TravisFling]

Come on Chris,
That's the best part about the Nautique! You either hear that big 351 telling the I/O's that it's time to put up the tube and head in for lunch, the Nautique's are on the water, or you hear your stereo. I just can't imagine wanting to soften the noise from that big V8...

[Chris4x4Gill2]

No I dont want to deaden the exhaust sound, I was just wanting to tone down the engine drone from right behind my drivers seat.

For now I've abandoned this plan, I've got the amp on order. It should be here Wednesday. If it bothers me after that, i'll rethink this plan.

[Andrew]

considered spraying the inside of the shell with an underbody coating? a couple of nice thick coats of that stuff should make a significant difference.....

[Chris4x4Gill2]

yea that was actually my first thought. I did this to the floor of my truck. It really helped cut down road noise, but wherever I had a floor mat on top of it it would get sticky during the summer. SO I was scared the heat under the clamshell would do the same thing.

If I can find some that wouldnt that would be my first choice.

[swooddc]

haven't looked in to it, but I wonder if Line-x would do it? I don't think heat would affect it and surely it would have a sound deadening effect. I know they will spray most anything, might be worth a check.

[MikeC]

Do a google search for "boat sound proofing" - there are a number of different suppliers. I bought some sound proofing material at BoatersWorld a few years ago, it's on their website but it says it is no longer available. I would try one of the suppliers from the google search and be sure to use something specific for engine compartment use. There is a lot of material that will work when the engine operates normally, but it also has to withstand any malfunctions (i.e. excessive heat, flames etc...) within the engine compartment.

[TravisFling]

You might look at Rhinoliner, which is fireproof, etc. that might work.

[Chris4x4Gill2]

yea the rhinoliner and LineX are basically the same thing. The kind I used before is a spraycan do it yourself type of Rubberized Undercoating. The rhinoliner or linex would definately be the better choice i would think

[swooddc]

it just occurred to me that LineX/Rhino liner might significantly increase the weight of the clamshell....

[wildsv211]

Check out Summit Racing website. I have purchased sound deadening mats for my 56 chevy Belair. If you buy the Summit generic brand you will save a few bucks and it is manufactured by Hush Mat . Summit just slaps their part number on Hush Mats box... It has held up real well so far and that is even after i stuffed the 454 Big block motor under the hood.

[Chexi]

I also want to do this. I find this article to be very insightful about the project.
http://www.wakesiderides.com/nautiqu...le.php?id=150\
They claim the kit can be purchased from Overton's also, but I have not had luck finding it.

[Chexi]

http://www.overtons.com/modperl/prod...ew&i=25005

Sold out now though.

[jaybird]

I'm not sure you will be satisfied with your results. Most of my sound was from the exhaust. I operate a manufacturing company and made a copy of a FAE system (fresh air exhaust) my wife and I are both big music fans and the FAE is a dream come true. I do not know the db reduction but I would guess the sound level with the engine running is half what it was, even a 21 MPH which is my boarding speed. People on the lake noticed and joke that I could sneak up on them now.

I just don’t see the engine cover insulation helping much. Sounds like a good idea but with my FAE I still don’t really notice noise from the engine cover. But in light of the cost they charge for the FAE it may not be something you want to invest in. I think I spend $200.00 for the parts but of course the labor was free in my case. I don’t recall the cost of a factory FAE but I believe it is 6-$800.

[MikeC]

FAE - 425 single exhaust; 500 dual exhaust. $100 discount right now (325 and 400). Worth twice that much if you ask me.