road noise

[AMSOILGUY]

Well the weather has finally been nice enough to get my car out. I had DSE minitubs put in over the winter and the road noise is horrible over 40 MPH. Other then the new tubs I didn't change anything. So I guess i'm wondering what my options are with helping the road noise?
Jacob

[jy211]

dynamat the floor? :idea:

[Sieg]

Spray sound deadening undercoat the wheelwell. Dynamat or similar on the interior side. I also installed a sound barrier of 3/8" commercial fiber carpet cushion in the back of my rear seats which made a noticeable difference.

[GregWeld]

........ Dynamat or get yourself a Prius.



If it was mine... I'd install louder mufflers.

[AMSOILGUY]

Prius won't cut it. Thanks for the replys. You all confirmed what I was thinking on the dynamat but I wasn't sure if something else might work better.
Jacob

[Sieg]

You all confirmed what I was thinking on the dynamat but I wasn't sure if something cheaper might work better.
Jacob

Fixed :thumbsup:

[Steve Chryssos]

I recommend:

http://www.acdc.com/us/home

:beavis:

[WSSix]

Road noise needs to be blocked using a sound barrier not a vibration dampener. Dynamat Extreme is a dampener. It will help some but ultimately it will do very little to block road noise. They do have a product that is both dampener and barrier. That would be what you want. There are other options out there as well. Undercoating the wheel well on the outside will definitely help too. Sand and gravel hitting the wells creates a lot of noise and happens often.

What I've done on my Sierra and will do on my other cars is to lay down dampener pads/tiles, you only need to cover a percentage of the areas in question, followed by a decoupler layer which is typically closed cell foam, and finally top it off with mass loaded vinyl. It's important to cover the entire area with the foam and vinyl as any gaps are places noise will enter. My 01 Sierra is quieter than my sister's 05 Lexus RX330. I've covered the entire interior except the firewall and roof. Though I do have dampener tiles on the roof.

[HRBS]

another option is to Raptor or bedliner the exterior side of the tubs.

[carbuff]

I haven't driven mine yet, but I did the combination of Dynamat Extreme and then Dynaliner to cover both issues as WSSix explained...

Here are couple of 'in progress' pictures:

http://i100.photobucket.com/albums/m23/carbuff69/1971%20Firebird%20Formula%20-%20Project%20TOW/update_0210_13_zpsa7d6ce98.jpg

http://i100.photobucket.com/albums/m23/carbuff69/1971%20Firebird%20Formula%20-%20Project%20TOW/update_0304_02_zpsa545b9f4.jpg

[JKnight]

I don't even know if my car makes road noise. Can't hear anything over the engine, exhaust and radio.

Second Skin Audio's products worked well on the heat and noise through the firewall on my car. They make a quality product.

[VetteCam]

I just watched a show on the building of Rolls Royce vehicles..seems that they use about 1 inch think high density foam along with foil backed dynamat type stuff to lay down.
On my personal car, I've only tried dynamat and it works pretty well.

The high density foam seems to be the key to REALLY quieting all the different frequencies down.

DZ

[WSSix]

It's not so much the foam as it is the fact that the foam gets the sound barrier away from the source which is the sheet metal in this case. If you were to put mass loaded vinyl on top of the dynamat or even bare metal, it wouldn't do much.

Here's where I bought all my stuff for my Sierra and learned about the different types of products. The biggest thing for me was the education behind the materials. I hate marketing people as they are only con artists trying to get you to buy a product. I want know how. You'll get that on this website.

http://www.sounddeadenershowdown.com/


I did like he suggests and went with 1lb/ft^2 mass loaded vinyl through the doors on my truck. It's an extended cab. I didn't put any MLV under the carpet or behind the rear seat initially. I didn't want to spend all that money at once since I just wanted to get it a little quieter without going overboard. The results were great! I've since added 0.75 lb/ft^2 MLV to the rear wall. I believe this helped even more. I went with the lighter stuff because I got it shipped in from HomeDepot for a good price and because I'm cheap and willing to accept lower quality for less cost. All in all, I'm really happy and Don's website taught me a lot.

[AMSOILGUY]

Thanks for the pictures carbuff and everybody else for the input.

[AMSOILGUY]

Well I got a few minutes to work on this so I thought I would post some pics so those that read it know what I did and i'll post up my results. So I ended up going with the dynamat and dynaliner. http://carphotos3.cardomain.com/images/0016/25/84/16185248_medium.jpghttp://carphotos2.cardomain.com/images/0016/25/94/16185249_medium.jpg

Then I thought I might as well snap a few photos of the new DSE tubs that I had installed. http://carphotos4.cardomain.com/images/0016/15/96/16185169_medium.jpg http://carphotos4.cardomain.com/images/0016/15/76/16185167_medium.jpg

I should have some install pictures soon I hope!

[69x22]

All these sound deadners mentioned will help tremendously. Something to keep in mind a wider tire with the aggressive tread pattern will also be noisy no matter what. I took the Pilot Sports off the back of my car and installed a set of Hoosier drag radials with 2 grooves. The first thing I noticed was how much quieter the car is.

[Ripped]

I have a ton of sound deadener, in my car.

Where I get noise, being an older car, is;

#1 Wind Noise. The old windows do not seal air tight, and there is a ton of tubulent air around the vent windows, roof drip rail, chrome trim and mirrors.

#2 Engine and header noise. More solid motor mounts and headers contribute to some noise, and exhaust. I wrapped the mufflers and primary exhaust pipes with header wrap (that worked)

#3 Suspension noise, rod ends, firmer rubber bushings contributes to more direct transfer of road noise.

Only the wind noise really bothers me. Even if you have the windows down a crack at freeway speeds, you cannot even talk to your passenger. Radio = forget it. I have a/c bu my wife insists on having a window down, usually (I don't bother arguing ;) )

[SLO_Z28]

Id be willing to bet a lot of the noise is your tires. What condition are they in? Can you describe the noise?

[AMSOILGUY]

Id be willing to bet a lot of the noise is your tires. What condition are they in? Can you describe the noise?


I believe your bet is good. The tires are probably fairly old they were on the car when I bought it. They are 195/50/15 T/A's with good tread life but show signs of age like cracks.

As far as the 2 products I used, I am happy with what I hear. I do notice a huge difference on exhaust noise. The exhaust ends before the rear end so that made a big difference. I've only done the back half of the car so far but can see change in cabin noise. I think its money well spent if your not worried about weight.

Here are a couple shots I took after putting the dynamat and dynaliner in.
http://carphotos4.cardomain.com/images/0016/83/62/16193826_medium.jpghttp://carphotos4.cardomain.com/images/0016/83/52/16193825_medium.jpg

[Gatekeeper]

I recommend:

http://www.acdc.com/us/home

:beavis:

I agree, that should do the trick. :rockin:

[Sieg]

I was just thinking about the package tray area which I've yet to "seriously" address........if you're not running speakers with enclosures they are going to act like transfer ports reflecting trunk area sound off the rear glass. Installing some sort of acoustic barrier on the underside of the package tray should be noticeable.

[AMSOILGUY]

I was just thinking about the package tray area which I've yet to "seriously" address........if you're not running speakers with enclosures they are going to act like transfer ports reflecting trunk area sound off the rear glass. Installing some sort of acoustic barrier on the underside of the package tray should be noticeable.


What I did was put the dynmat on the underside of the tray and the dynaliner on the top under the little cardboard piece. Tunes seem better but whoever first put speakers in the car really made the metal tray mangled so you can't even get all the screws in sheetmetal. That's another project.

[Sieg]

What I did was put the dynmat on the underside of the tray and the dynaliner on the top under the little cardboard piece. Tunes seem better but whoever first put speakers in the car really made the metal tray mangled so you can't even get all the screws in sheetmetal. That's another project.
Do you have enclosures on the backside of the speakers? I believe the speaker itself will transfer some sound if not shielded. Just a guess though.

[AMSOILGUY]

No I do not have enclosures.

[AMSOILGUY]

Well I was wrong to blame the DSE tubs for the noise. Turns out it was axle bearings. Wow what a difference I'm glad that is taken care of!

[clill]

Now that is funny.

[AMSOILGUY]

Now that is funny.

What is?

Now what is wierd is that I never heard the bearings making noise until after work was done in the rear. Regardless one was near dead just their time.

[WSSix]

Glad you got it taken care of before the bearing seized on you.

[AMSOILGUY]

Glad you got it taken care of before the bearing seized on you.

Could make for a wild ride. I wasn't driving it much because I knew something wasn't right. My friend and his brother went through the rear end for 200 bucks. No way to complain about that price huh.

[Shmoov69]

I think Charlie was just saying its funny that you did all that sound deadener and it was a mechanical problem all along.

But good that the other made a difference anyway!

[AMSOILGUY]

I figured that but maybe I missed something. Man the rear question is how did the guy before me live with this thing. I don't know but its running strong now. Just w ish a car seat would fit. :bang: