Originally Posted by ejones
I have a 06 v6 pony 5 spd manual with a dual exhaust and a CAI. I would like to make it a little quieter inside the cabin so that I can listen to the radio or talk with a passenger. I heard that the dynamat extreme would help. I was thinking about installing it in the trunk on the floor and wheel wells. That seems pretty easy to do. Has anyone done that & had a success with quieting down the mufflers inside the cabin? They seem to get crazy loud around 2000 rpm. Is it enough to do the trunk? Does one have to use the dynamat under the interior rugs to be effective? That seems like a lot of work to remove the seats. How about the door panels? Do they need to be lined? That also seems like a lot of work. Anybody's experience with this project would be appreciated
I was researching this recently and discovered that Dynamat is not particularly effective or practical for sound deadening. I always thought it was but actually it is best for killing vibrations, i.e. sheet metal resonance. You may need/want to add some Dynamat but to quiet the exhaust noise, road noise, etc, you need to add an effective sound barrier which MLV (Mass Loaded Vinyl) is designed to do. Check out the technical details for MLV, details on Dynamat and others related products at sounddeadenershowdown.com
. Read the whole home page and you'll be much better informed on what's available and what the products do.
I just installed some MLV the other day and it worked very well. I needed to block out my aftermarket transmission gear whine. I only bought the a minimum 13.5sq/ft (just under $50 shipped) and was able to cover the transmission tunnel and the flat of the driver's front floor. Before the MLV I could hear a loud nasty whine in gears 1- 3 with 4 & 5 loud but more liveable. Now, I don't hear any whine at all in 4th & 5th gears and 1-3 are a lot more tolerable. I'm going to purchase some more to do the complete cabin floor including under the back seat and I should be happy.
Keep in mind the more area you cover the quieter it will be. In our cars the mufflers are way back under the trunk so that's where you should start laying down the MLV.