steven121

iTrader: (27)

BluEVOIX

iTrader: (69)

I’m not sure how much Dynamat will help but you could try adding Jute Padding. Evo’s (CT9A) are not well insulated from exterior sounds and dont have that much of Jute Padding. The RS versions are even worse. Here is a link or you can probably find at a home improvement store near you , Lowes, Home Depot etc.. https://www.macsautoparts.com/ford_t...66-388437.html

Also, under the rear seat there is a rubber mat the engineers added to the car. I believe they probably added it for sound reduction purposes. I wonder if adding something similar to the rest of the floor will make a difference ... ?

huzzle101

iTrader: (5)

I have seen posts on here of people doing sound deadening and saying it works. They only complain about it making the car heavier.

Jp7

iTrader: (11)

I have 3 cars- on 2 of them (not the evo) I completely detrimmed the entire interior and "dynamatted" every square inch of the trim, and sheetmetal. It made a tremendous difference and the cars sound like luxury cars now. The main reason I did this was to reduce rattles (I have aftermarket audio and a subwoofer in each of them) I did not use dynamatt, I used a much better OEM variant of the dynamatt. It lowers the natural frequency of vibration and makes it respond less those kinds of sounds.

MasterNater

iTrader: (82)

A lot of good sound deadening information can be found here.

BillAce

iTrader: (2)

I did a lot of high end competition audio systems and would cover metal and the back of interior panels with deadening to prevent any rattles or interior noises from being heard. I've added 100's of lbs to some cars. In my own Evo RS I figured if I'm going to add weight to a car to block out road noise I would just put a simple system in. Head Unit, front 6" & tweeter components and a single free air sub. I did add a few small pieces of deadening where the interior rattled.
If you're going to add sound deadening I like Hushmat, it adds some density and blocks more than just dynamat

BluEVOIX

iTrader: (69)

What is the “OEM variant of the dynamatt” you used ?

llDemonll

iTrader: (21)

this is the correct answer. sound deadener showdown has TONS of great info

dynamat is a material meant to stop resonation, not block noise.

steven121

iTrader: (27)

steven121

iTrader: (27)

kpt6

iTrader: (126)

Interesting thread. Being an SSL (Cadillac Evo FTW) fan myself, this would be tempting to do on an SSL car if you could really make the interior of the car quiet like a luxury car inside.

Would be good info to hear your results after you get it done.

steven121

iTrader: (27)

Jp7

iTrader: (11)

OEMs buy this material from the same companies that sell it publicly- but at much lesser costs. Because I have many contacts in automotive, I was able to purchase a large quantity of the good stuff at a much better price.

GSX_TO_EVO

iTrader: (5)

Jp7

iTrader: (11)

toyota/lexus OEM stuff