Mahjik

iTrader: (1)

I would still recommend Dynomat/B-Quiet. Those products also make the door speakers sound much better and kill the road noise rather than just helping with a "hollow door" sound solely.

widebody2

I stuffed mine with crumpled news paper and it made a big difference haha

Shad Laws

Hello-

I couldn't agree more. I did the seam sealer and the door closing sound was a million times better. Then, just a couple weeks ago, I got some insulation and took care of the doors and sunroof... oh my god, the car is so much quieter on the highway. The stereo clarity is MUCH higher, too!

Take care,
Shad

WaLieN

Can you give us the details on what you used?

Mahjik

iTrader: (1)

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/insulation-project-%3D-easy-successful-380946/

jsplit

I agree with mahjik, dynomat is the way to go. It's pricey but it works like a champ.

David Hayes

iTrader: (6)

Hi guys,

I have a much better solution than DynoMat. It's way too pricey and it weighs too much.

Check out Quiet Car at www.quietcoat.com. The product is a viscoelastic polymer that sprays/paints on the car. It is not a rubberized undercoating, but a material that actually bonds to the surface of the car to eliminate vibrations, thus eliminating sound/noise. I've written up the application and results of the product under:

https://www.rx7club.com/showthread.p...ight=quietcoat

The bottom line for me was a 14db reduction in noise which is significant. Here is a chart showing the three phases of the project and the results:



For me, the product worked great.

turbojeff

iTrader: (30)

Good point.

I think what is important here, if you have the "pingy" door closing sound, fix it without using dynomat, take advantage of what already works w/o adding weight.

Then if you still don't like the way your speakers sound then add dynomat (or whatever system you want to use) for additional sound deadening.

saxyman990

Agreed. Thanks Jeff.

The "pingy" sounding door did not exist when the car was new. It is an issue that develops over time (due to the seam sealer breaking causing the door skin to seperate). The point of the thread is to point out that this issue can be solved by fixing the inherent failure. This fix will effectively bring the sound of the door back to the way it was when it was new. Sound deadening can always be added on top of this for improved effect.

-Rob

jsplit

I understand the weight thing for you guys who actually have race only cars, but I mean to dynamat both doors cost me all of 8.5 lbs and I could care less about that weight because I can get dynamat at cost.

Mahjik

iTrader: (1)

I used the B-Quiet stuff. The shipping box TOTAL (including the box) was 6lbs which contained 3 sheets of the material, some papers and the rolling pin tool. I used 2 sheets. Doing both of my doors probably added maybe 2lbs at the most.

G's 3rd Gen

iTrader: (11)

Just begining to piece my car back together after paint restoration and shot some seam sealer in seperated areas like dicussed. Worked like a champ! No more pinging door! Thanks Guys.....

zullo

Mahjik, where'd you order the B-Quiet from?

Mahjik

iTrader: (1)

http://www.b-quiet.com/

jeremyb

uhm....b-quiet dynamat? damper? extreme? ultimate? Which one works the best?

Jeremy

David Hayes

iTrader: (6)

Wow, I feel so slighted!! Check out my post above concerning www.quietcoat.com versus dynamat and the rest. In my opinion, it's a much better way to go.

Mahjik

iTrader: (1)

The Extreme is going to be the lightest of the bunch. IMO, that's going to give you a noticeable difference without killing your wallet or adding boat anchors to your car.

IMO, if you are just doing the doors, the spray type stuff like Quietcar is a waste. If you are coating everything (i.e. undercar or have the entire interior ripped out like one of TurboJeff's project cars), then Quietcar would be ideal.

moktan_fdtt

Awsome, thanks for taking your time to write this write up.

Chaosx1

Haha, David, you've convinced me to try QuietCoat.

FDeez

Bringing this thread back from the dead...

So, I'm about to do this...but for the life of me, I can't find any sort of automotive seam sealer at my auto parts stores. All they have is window/windshield sealant, RTV, and other gasket sealants. So, my question is: What other type of sealant is equivalent/capable of this fix? JB Weld? Expanding foam? Construction-grade adhesives?

moconnor

iTrader: (14)

I found some pretty cheaply on eBay.

TMadlem84

^eBay? I can't wait that long! Anybody find the stuff in a store?

xthephilx

Exactly what I did a few weeks ago. It sounded like a new car.

AHarada

iTrader: (25)

Some people also said they used expanding foam to get more of a thud sound from the door. Can anyone give some details on this also? Where would the foam go?

And what is the vapor barrier for? I don't think mine has it. Is it for sound insulation? Can it be replaced with the quiet coat stuff, or dynomat?

Monkman33

iTrader: (28)

vapor barrier - kind of self explanatory.

Keeps water (that leaks between the outside of the window and the seal) from getting to the inside of the door panel. prevents molding and the like.