Sound deadening for Exhaust noise

[skyline1627]

Hi everyone,

So I have the Greddy Evo 3 exhaust with silencers. I have any ear condition (permanent holes in ear drum) which makes me very sensitive to low/high frequency. The silencers do help quiet a lot. I'm not too sure if its still hurting my ears since the install without the silencers did some damage.

I am going to the doctor for it in a few weeks. If he can't solve my condition then I am thinking of sound deadening my trunk. I do not want to sell my exhaust but that will be a last resort...

Does anyone have opinions and comments regarding sound deadening. Please share your experience. Thank you.

[tonystewart]

It worked for my daughters car
http://www.ft86club.com/forums/showp...1&postcount=14

I used Rammat and Ensolite throughout the car, very thorough in the trunk
I replaced the Perrin Catback with the stock exhaust
The car has an FA20Club Equal Length Catted Header, Perrin Overpipe, Nameless Catted Front Pipe with Helmholtz Resonator
Currently running OFT v2.01 Custom Tune

The car is quiet at idle and at cruise.

[BirdTRD]

Originally Posted by skyline1627

Hi everyone,

So I have the Greddy Evo 3 exhaust with silencers. I have any ear condition (permanent holes in ear drum) which makes me very sensitive to low/high frequency. The silencers do help quiet a lot. I'm not too sure if its still hurting my ears since the install without the silencers did some damage.

I am going to the doctor for it in a few weeks. If he can't solve my condition then I am thinking of sound deadening my trunk. I do not want to sell my exhaust but that will be a last resort...

Does anyone have opinions and comments regarding sound deadening. Please share your experience. Thank you.

I feel your pain. I have Meniere's/tinnitus in my left ear so my 50+ year old ears can't tolerate "noise" like they used to. I had the TRD catback for a while, although I loved the tone, it annoyed my wife to the point that she wouldn't ride in my car and it would get a bit "annoying" to me as well on longer rides.


I contacted Don at Sounddeadenershowdown.com after searching thru other threads here and decided to give sound deadening a try. Took me about 4 days (a lot of work!), but I did the entire interior of the car with CLD tiles, Mass loaded vinyl, closed cell foam and 3M thinsulate based on Don's recommendations. Probably added about 90 pounds to the car but the cabin noise went down significantly and the stereo also sounds much better now.


I ended up selling the TRD catback because I wanted a header (OFH) and figured that having both would negate what I had just accomplished with sound deadening. So currently I am running completely stock exhaust and it's super quite inside. I can have a normal conversation on the Bluetooth now whereas I couldn't before. I even have the sound tube opened back up again so I can hear some fake engine sounds.


Do a little research on sounddeadenershowdown.com. Our cars have very little in the way of sound deadening material in them so we get noise from many sources (tires, road, wind, engine, exhaust, wife yakin’ etc.). You'll have to find your balance between what you want to hear inside, what you want the car to sound like outside and what you're willing to give up performance wise (you will feel the extra lb's of the sound deadening material which was one of the reasons that I opted for the OFH and OFT, to regain what I had lost...then some)

Good luck to you.

[tonystewart]

BirdTRD is correct

[skyline1627]

Thank you for the reply. It really helped a lot.

90lbs is quiet a bit of extra weight. I want to try to keep the added weight to a minimal. I hope just by doing the trunk that it will be enough to get what I want.

I been reading review on Dynamat, Raamat etc. I'm just looking for the best one for the least amount of added weight.

I am definitely looking into the product you advised. I like the look so far compared to dynamat. It looks more natural without the tinfoil look.

If anyone else has any suggestions feel free to inform me. You will be helping with my research. Thank you.

[arghx7]

.....

[tonystewart]

What movie is that from?

[skyline1627]

Originally Posted by arghx7

.....

I can tolerate certain frequency. When my bro had his boosted civic with a 3inch exhaust. It didn't bother me. Every exhaust is different. I'm not going to let my condition stop me from doing something I want to do. Please don't be a troll.

[P@ul]

I think the most strait forward thing you can do is cut out NVH material to match the trunk liner. Like MLV or that recycled foam stuff. That should help out a bit with the exhaust. But honestly, there's plenty of quiet exhausts that add power without the noise. I have an Ark Design Road spec on my car and it's very quiet.

The tire noise on this car is killing me. I need to buy more NVH material...

[toast]

If you are weight conscious only apply the heavy raamat to panels that audibly ring when you wrap on them with your knuckles. Use Ensolite everywhere. Remember that a panel can only make noise if it can transfer the vibrational energy to the air. A good layer of ensolite removes that possibility and it weighs basically nothing. I'm going to start going over the car this weekend. I'll take lots of pics.

[tonystewart]

That's how I did, tapping and applying rammat, ensolite everywhere

[industrial]

I would concentrate on sealing off the trunk area from the cabin. That means the areas around the rear wheel wells which act as a megaphone from the rear. Also the rear deck area with it's many holes. Both areas should be completely sealed off from the cabin. I would look into using expanding foam to build up a solid barrier near the rear wheel wells and then cover that with sound deadening mats and closed cell foam. I'd also just plaster the rear deck from the top with sound deadening and closed cell foam.

I wouldn't bother with the trunk itself if you are concerned about weight. You need to seal it off from the cabin. People do the trunk because they have subs back there and want to eliminate rattles and such.

[skyline1627]

Originally Posted by P@ul

I But honestly, there's plenty of quiet exhausts that add power without the noise. I have an Ark Design Road spec on my car and it's very quiet.

The tire noise on this car is killing me. I need to buy more NVH material...

I just don't want to go through the hassle of buying and reselling an exhaust and possibly lose out on money. I love the greddy sound from the outside so I'm going to stick with it.

[skyline1627]

Originally Posted by toast

If you are weight conscious only apply the heavy raamat to panels that audibly ring when you wrap on them with your knuckles. Use Ensolite everywhere. Remember that a panel can only make noise if it can transfer the vibrational energy to the air. A good layer of ensolite removes that possibility and it weighs basically nothing. I'm going to start going over the car this weekend. I'll take lots of pics.

Thanks a lot. I'll look into that. And I shall be waiting for your pictures!