Contemplating getting the pro-1 exhaust which I know is not one of the quiter systems..I do however like the tone of it..

Right now all I have are test pipes and the stock exhaust. The db level inside the car has definetly gone up but is bearable and enjoyable. I've read that this exhaust will raise the db levels even more and I'm quite content with not really going any higher than what I have now. So my question is, will sound deadening material like Dynamat help control the db level inside the car? If so, which Dynamat product would be best and where should it be applied?

 

Dynamat will help, but not too much, you'd have to add ALOT of it to really make a huge difference. I'd try the exhaust on first, before going down that road. It's not easy to install either, since you'd have to be lining the floor-boards with it. Dynamat has a few products out there for this, and all are reletively good, but for the floor, the thinner the better IMO. BUT, i recomend against it. It's heavy, and will weigh your car down more, it's kind of pricy for the amount that you are looking to use, and you'd have to remove your seats, and carpet to install it. Just a huge headache if you ask me... I come from a stereo background somewhat, with my old showcar, and we did that with the entire car, doors, floor, roof, trunk etc... it's a pain...

 

Go buy a sedan or something....no seriously liek Tony stated that would be a pain considering that the floor in the Z is not ideal for applying dynamat. It has a lot of little curves etc I know because I removed my sound deadener

 

LOL ... he said sound deadener

 

I dont get it

 

me neither =(

 

You can use Fat Mat as well (much cheaper than dynomat). If you put two layers in your trunk that will make a noticable difference in the noise level from the exaust. You will still hear the exaust but it will be a little less loud.

 

ok here is a trick..... and it is virtually weightless,


go to home depot and buy the 1 inch thick wall insulation, its made outta foam and has tin foil looking sides on it, you can easily cut it with a razor knife and cut it to fit exactly under your carpet in the back, i used this stuff in my studio i had at my former house and it cut out the sound dramatically, plus a whole 8X10 sheet weighed about 2 pounds and you wouldnt need but maybe a 1/3rd of it, you would probably need to cut it in two pieces to fit it in right, then i would buy some UL approved foil tape to seal up the two pieces, now i learned if you can make it semi air tight, it reduces the sound level tremendously....

 

if thats the case wouldnt a dence carpet pad do the same thing AND be flexible since its made from foam annd rubber?

 

Dynamat is designed to be a thin sound deadening material, for tight spaces, and tight curves or angles. And the way dynamat is produced, it actually beats other forms of insulation and deadening.

 

Try searching, but dynamat or any other sound/vibration resistant material will not do what you are looking for. Try this:

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

The composite materials will reduce db a great deal.

The stuff from Home Depot you can use as an alternative is (I think) flashing for the roof. You can find it in the roofing section, and it is very similar to dynamat extreme, just slightly thinner.

I've read in other posts that it smells, which is not correct. Edit: It does smell initially, but if you let it sit for a overnight before reinstalling all interior panels it shouldn't. I haven't smelt it since the install, and I was very concerned about it. I purchased a dynamat set, some of the flashing material, and some of the b-quiet composite from above. I only used the flashing and dynamat extreme in the rear ( I have 2 12's in where the spare was). By totally filling the rear and the middle section of the car bass response was MUCH better. Road/Exhaust Noise did decrease, but not significalty. I then added dynamat extreme to the doors, and one additional layer of the flashing. That helped a bit, but the composite material from B-quiet on the floorboads of both the drvers and passenger floor REALLY HELPED. This cut road/tire noise significantly. The overall weight I added was only like 14 pounds, so that shouldn't be an issue for the really weight conscience. The car now sounds as quiet as a lexus at 70 mph on the freeway.

I've also seen others who've used the foam spray on the outside of the wheel wells, which they claimed helped a great deal as well.I can't back that up with experience though.