Hey all,

As some of you know, I've been spending a lot of time trying to reduce road noise. Just wanted to let you know what I did and if it helped.

First, I did all four doors (sedan) and the trunk floor and sides with one layer of dynamat. I also put squares of brown bread on the front and rear car floors. Finally, I put v-comp in the doors and on the car floor. Here are the results I found.

Overall, there was little difference in actual road noise. Doing the front doors with dynamat made the speakers sound louder, while doing the trunk increased the bass level. The v-comp, which is supposed to be a sound absorbing foam, didn't make much difference. There was also no difference after doing the floors and lower firewall with v-comp. I feel like I've wasted money with this project and should have only done the front doors, rear deck, and trunk. Everything else was a waste of time and added another 60-80 lbs to the ride weight. The only thing that improved was the stereo. I've got infinity speakers all around, and the distortion went way down. The highs were still a bit harsh, but if you turn the tweeter away from your ear direction it sounds good. I think getting better tires would be the best way to go. PM me if you have specific questions about how to take stuff apart.

have you considered using rubberized undercoating oin your wheelwell? a majority of road noise enters yrou car from the wheelwells directly, to get in from the underbody it has to get through the metal, the stuff already there, the carpet, etc.

the wheelwells is a far more direct way for road noise to enter the car. as well as the firewall.

and the trunk when the paneling is out and the seats folded down, but like youve said above, you got the trunk well covered.

also while dynamat may cover bits and pieces of the doors, it cna be difficult to get teh entire door skin. path of least resistance, noise will find its way in however it can, unless you cover everything.

with that in mind, have you considered using rubberized undercoating inside the door? you can spray it through all teh small holes in there, and ensure 100% coverage....

I've done a few coats of rubber underspray for the wheel wells. I also removed most of the v-comp to save weight. Dynamat is still the best way to go for a good difference. Carpet foam is also a good idea for the floors, as it helps with noise while being extremely lightweight.

How did you do the front doors? Did you just plaster the metal parts, or did you attach it to the door panel as well?

I just installed some speakers and I get some nasty buzz when the bass is going (and the volume is up). Mind you, I haven't screwed the door panels on all the way, yet, because I wanted to add some (generic) dynomat on the inside. (I've got the stuff, just haven't used it yet). I assume the buzz is the door panel, because it isn't a metallic sound, but it might be something in the doors themselves. It might also be the plastic ring where the speaker is (the thing that was there for the factory speaker), because the speaker is out about 7/8" from the door frame, and it might well be close enough to the plastic ring to make it vibrate against the speaker itself. If dynomat doesn't work, I'm going to try shaving that ring down. (I might do it anyway, as it bothers me being so close to the speaker.)

My speaker is falling apart and the door panel won't even close. They didn't do a good install job I guess. Best way to fix it is get a sub and set the crossover on the deck so the speakers don't play really low bass. But try the dynamat, since it will make the speakers sound better anyway. I just put a layer on the door metal. You just have to trim areas where there are wires.

Thanks, I'll just try sticking it to the metal then..
If I can't get rid of it, maybe I'll pick up a sub, too, and try that.

dont forget the heat gun.

unless your generic deadener sucks.





in that case, bust out the blow torch