Quieting Down a 1990 Civic

[StreetMetalBen]

I'm starting to do my system right in my 1990 civic sedan.

And the eventual goal will be a trunk wall with 2 12's or so. But stereo is not the only reason I want the deadening. That car is very loud driving down the road. I know everyone says you only need to cover 25% of the metal to get rid of the metal resonance. But how much do I need to block the outside noise?

And how much square footage do I need to cover the floor, roof, trunk and inside of the firewall?

Thanks!!!

[toadking90]

The damp just makes the vibrations go away the noise can be killed with luxury liner. And that has to be 100% coverage in order to make a barrier.

[Guest]

do you want it to be like a bentley? or like a regular lexus?

[StreetMetalBen]

Haha I want as quiet as possible. Now I'm not anal or anything, but I don't want to waste my time or money. If I need 100% coverage, and I'm on limited funds, should I just buy that cheap(Ish) fatmat? Or only get 40-50% coverage of second skin??

I will never be going for competition stereo, just something a little louder than the average best buy system.

[Lbox88]

DON'T get Fatmat lol. Seen so many bad pics of that shit falling off.

[toadking90]

You don't need but maybe 40 percent of sound damp. The luxury liner would require 100%. But yeah. Just the sound damp would help a lot

[Lbox88]

Maybe try just the damp first to see how it sounds since you will want that on there anyways, and then look at maybe adding some luxury liner later if need be

[StreetMetalBen]

So approximately how much do I need for an old beat up civic? And what'd vice do you have 4 weather stripping and window seals? Other than just buy new stuff which is easier said than done on my car.

[justinschmidt]

Is your car making the noise? Or is it road noise? Check motor mounts and exhaust hangers before deadening. I have a 89 civic hatch with two 15's and it's quiet as hell without my subwoofers playing. I have an all stock exhaust, good mounts and bushings, ect. Oh and my car only has 1 1/2" ground clearence as well.

To stop rattles, expanding foam helped me out in the hatch, not sure how that would help you In the trunk but it's worth a try.

[StreetMetalBen]

And if the second skin is really only 4 blocking metal resonance, then would I benefit from putting it on the floor board of my car? The Floor is very thick and multi layered. I'd don't want to install it anywhere that is wasted due to it being so expensive!!