Is it difficult to hold a conversation in your car because of your rowdy engine noise, pimping exhaust or trembling dash board? Well, finding the cheapest way to quiet a car interior really depends on –

Where the noise is coming from; engine, exhaust, dashboard, wind road noise or other interior?

The type of car you have

How old is your vehicle; this can determine whether it’s a defect in your engine or not

Once you’ve established that the noise is not an engine-related problem, you can start looking at the next step. More than likely in your research you’ve read about a product called Dynamat – which is basically a foam shield that you insert in underneath your existing floor mats.

However, if you don’t want to go that route, you can try any of these ideas:

High density or expanding foam

Changing the weather stripping

Using carpet padding in addition to your foam

Cutting up camping foam floor pads

 


FORUM THREAD


alkatmsu

Joined: Nov 08 2005
Posts: 1560
Location: Kentucky
Post Wed Apr 15, 2009 7:46 pm

Like the subject says… My car’s been in the shop for the last week, and I’ve been driving moms. I never realized how LOUD mine is compared to most. The sounds of the engine, wind, everything… it’s near impossible to have a cell conversation, and even in-person ones are difficult. What’s the best, CHEAP way to quiet down a car without resorting to dynamat-style solutions? I don’t have the time or money for that.
corvettecrazy

Joined: Dec 17 2003
Posts: 4357
Location: moved (twice)
Post Wed Apr 15, 2009 7:58 pm

Buy a better car. biglaugh.gif
byte

Joined: Mar 25 2009
Posts: 313
Post Wed Apr 15, 2009 8:23 pm

Some diesel car/trucks (GM for sure) have extra sound deadening materials on the engine side of the firewall and also underneath the body. Or find a old Caddy or Lincoln and take the underlay from beneath the carpet…Maybe you could find this from auto wrecker..

 

Last edited by byte on Wed Apr 15, 2009 8:39 pm, edited 1 time in total

KaosFaction

Joined: Nov 21 2004
Posts: 866
Post Wed Apr 15, 2009 8:32 pm

I don’t really understand what you are looking for…a cheap way to make your car more aerodynamic to cut down on wind noise? a cheap way to make your engine be quieter? If its not like vibrations in your cabin, there is not much you can do…
Moss

Joined: Mar 23 2004
Posts: 6436
Post Wed Apr 15, 2009 8:37 pm

KaosFaction wrote:
I don’t really understand what you are looking for…a cheap way to make your car more aerodynamic to cut down on wind noise? a cheap way to make your engine be quieter? If its not like vibrations in your cabin, there is not much you can do…

Some cars have no form of insulation on them. Some of that roof stuff that peel and stick stuff might help quiet things down in your car.

HoolaKinG

Joined: Apr 24 2003
Posts: 938
Post Wed Apr 15, 2009 9:26 pm

Some wheels are really loud, replacing those could help out.

Although that is more expensive than sound deadening material.

Phil
Owner, Oznium.comJoined: Feb 11 2003
Posts: 7719
Post Wed Apr 15, 2009 10:46 pm

Buy about 10 of those camping foam floor pads. The cheapest style possible which is just a foam pad. Cut them up as needed and duct tape them inside your door panels, under your carpet, behind your headliner, etc.
TRogers

Joined: Feb 09 2005
Posts: 6083
Location: Ohio
Post Thu Apr 16, 2009 3:04 am

When I had a 9500 in the hatch of my probe, dynamat didn’t help. I tried everything I could think of, and what ended up working best was filling the rattle spots with expanding foam.

icon_biggrin.gif

Cooper

Joined: Mar 19 2006
Posts: 1770
Post Thu Apr 16, 2009 4:07 am

Go behind a carpet superstore after they close and grab all the thick carpet pad scraps you can find out of their bins, then pull out the carpet and line the floor, tranny tunnel, and firewall .
AutoAustin

Joined: Sep 22 2008
Posts: 774
Location: Mineral Wells, Tx
Post Thu Apr 16, 2009 6:16 am

Lots and lots of packing peanuts
alkatmsu

Joined: Nov 08 2005
Posts: 1560
Location: Kentucky
Post Thu Apr 16, 2009 8:54 am

KaosFaction wrote:
I don’t really understand what you are looking for…a cheap way to make your car more aerodynamic to cut down on wind noise? a cheap way to make your engine be quieter? If its not like vibrations in your cabin, there is not much you can do…

The only vibrations in the cabin itself that I know of is my dash, which being a Cavalier, is cracked to all hell and there’s very little I can do anything about.

As of now, removing the carpet is the thing I don’t have time for… If I’m gonna do that, I may as well dynamat it. My car is a daily driver so I can’t have it gutted for a week.

How much of a difference would just dynamatting the doors make? Would dynamat (or some other brand of it, like Edead) hold up okay in my weather? It gets up to the 90’s in the summer, down to the teens in winter. What about replacing the weatherstripping around the windows/doors to cut down on wind leakage, which I know there is some?

A-Ray

Joined: May 01 2005
Posts: 4062
Location: Volunteer State
Post Thu Apr 16, 2009 9:12 am

Changing the weatherstripping would help some if your current is in bad shape. Deadening just the doors does help a little bit.

If you decide to go the deadening route, I highly recommend secondskin. It holds up well in all temps and is really easy to apply.

Tat2Dragons

Joined: Jan 21 2007
Posts: 3404
Location: Baltimore Maryland
Post Thu Apr 16, 2009 12:32 pm

Dude,just get yourself a bunch of rebar and cement and have at it with those doors. icon_lol.gif
Seriously though…there’s lots of great ideas in this thread.This ^^is not one of them. icon_lol.gif Good Luck with it. icon_smile.gif
Phil
Owner, Oznium.comJoined: Feb 11 2003
Posts: 7719
Post Thu Apr 16, 2009 1:24 pm

Dynamat doesn’t do much for road and engine noise which is a high frequency noise.

You need a thick foam to reduce engine and road noise. The carpet padding is a good idea too.

H-Town

Joined: Dec 10 2008
Posts: 1186
Location: Houston, TX
Post Thu Apr 16, 2009 1:39 pm

Phil wrote:
Buy about 10 of those camping foam floor pads. The cheapest style possible which is just a foam pad. Cut them up as needed and duct tape them inside your door panels, under your carpet, behind your headliner, etc.

this is an excellent idea. It wouldn’t weigh that much either.

bad venge

Joined: Jul 28 2007
Posts: 3550
Post Thu Apr 16, 2009 5:00 pm

Be VERY VERY cautious using foam …. What does foam do with moisture ?? It ABSORBS it …
That will cause RUST in the areas …Spray on/Rollon truck bedliner works VERY well and won’t rust … I took my car in for Rhino lining …
They sell a peel and stick rubberized liner for roofing , that works every bit as well as dynamat for 1/10 the the price …
KrzysD

Joined: Nov 07 2007
Posts: 1138
Location: Streamwood IL
Post Thu Apr 16, 2009 7:15 pm

Canned Foam? did wonders sealing my house.
alkatmsu

Joined: Nov 08 2005
Posts: 1560
Location: Kentucky
Post Thu Apr 16, 2009 10:11 pm

I think I heard somewhere about using closed-cell polyfill (aka pillow stuffing) inside doors. Anyone tried something like that? What effect would it have on the windows opening/locks/speakers?
corvettecrazy

Joined: Dec 17 2003
Posts: 4357
Location: moved (twice)
Post Fri Apr 17, 2009 6:01 am

Ear plugs!!
jdusty914

Joined: May 09 2004
Posts: 1623
Location: Tennessee
Post Fri Apr 17, 2009 7:42 am

My doors came stock with the pillow stuffing stuff already on the door panel…I just don’t want to take the stuff off….there is not interference from the stuff due to it being maybe a couple of thin layers in there….If you are getting a lot of “road noise” then I would check your tires and if it really is road noise then there are a lot of things you can do to lessen it, but most probably will not work very well….
lbjshaq2345

Joined: Jul 11 2007
Posts: 1524
Location: Jonesborough, TN
Post Fri Apr 17, 2009 8:51 pm

Cooper wrote:
tranny tunnel

Amused me icon_razz.gif I’m elementary.

corvettecrazy

Joined: Dec 17 2003
Posts: 4357
Location: moved (twice)
Post Fri Apr 17, 2009 9:14 pm

lbjshaq2345 wrote:
Cooper wrote:
tranny tunnel

Amused me icon_razz.gif I’m elementary.

Should be even more amusing because his car is FWD and doesn’t have one.

Tat2Dragons

Joined: Jan 21 2007
Posts: 3404
Location: Baltimore Maryland
Post Sat Apr 18, 2009 12:13 am

^^lol icon_smile.gif
shorterthanrich

Joined: Apr 22 2009
Posts: 8
Post Wed Apr 22, 2009 7:13 am

I second what A-Ray said. Second Skin is some of the best for much less than dynamat costs. dampen the sound with damplifier and also hepl reduce vibration, then for little vibrations here and there, get some rattle pad.

Best bang for the buck, and pretty much the only way to do what you’re trying to do…

GlowinPontiac

Joined: Mar 04 2004
Posts: 5959
Location: Central CT
Post Wed Apr 22, 2009 10:45 pm

corvettecrazy wrote:
lbjshaq2345 wrote:
Cooper wrote:
tranny tunnel

Amused me icon_razz.gif I’m elementary.

Should be even more amusing because his car is FWD and doesn’t have one.

My car is FWD and has a rudimentary transmission/driveshaft tunnel. Hell if you pull out the back seat it has the perfectly shaped raised areas to clear a RWD solid axle. Must be a holdover in design from the good ol days of RWD.

corvettecrazy

Joined: Dec 17 2003
Posts: 4357
Location: moved (twice)
Post Thu Apr 23, 2009 5:44 am

GlowinPontiac wrote:
corvettecrazy wrote:
lbjshaq2345 wrote:
Cooper wrote:
tranny tunnel

Amused me icon_razz.gif I’m elementary.

Should be even more amusing because his car is FWD and doesn’t have one.

My car is FWD and has a rudimentary transmission/driveshaft tunnel. Hell if you pull out the back seat it has the perfectly shaped raised areas to clear a RWD solid axle. Must be a holdover in design from the good ol days of RWD.

That tunnel is where your exhaust pipe is and under your back seat is your gas tank. Yes it is a “tunnel” but in no way is it large enough for a transmission and drive shafts. Also, the tunnel serves a structural purpose. icon_wink.gif

Tat2Dragons

Joined: Jan 21 2007
Posts: 3404
Location: Baltimore Maryland
Post Thu Apr 23, 2009 9:53 am

User posted image

^^Mine has Real Time 4wd and doesn’t even have a tunnel. icon_razz.gif Thats why I have a nice flat floor. icon_cool.gif

corvettecrazy

Joined: Dec 17 2003
Posts: 4357
Location: moved (twice)
Post Thu Apr 23, 2009 11:18 am

^^ just a different way to design. Instead of having lower floor boards and a tunnel you raise them up and have all the extra room underneath with a sacrifice on the inside. But on the element where it is just a box, they can just make the roof line higher without changing looks.

A fun game to play on owners of vehicles like yours is to put zip ties around the center and rear axles…

TRogers

Joined: Feb 09 2005
Posts: 6083
Location: Ohio
Post Thu Apr 23, 2009 11:50 am

Hehe, like the baseball card in the spokes right? Nice.
H-Town

Joined: Dec 10 2008
Posts: 1186
Location: Houston, TX
Post Thu Apr 23, 2009 1:18 pm

lol, we do that to the service techs vans with the big heavy duty 18″ zip ties.