Hey. Still wondering who's interested in dynamatting their cars. I haven't decided yet. Still all tingly about my bumper.

 

sounds like a lot of work ... where would you put the stuff?

 

that will double the car weight
heavy car = slow car + low MPG

 

just the doors and trunk lid

it'll add a little bit. but it'll sound soooo much better!!!

 

I did exactly the same on 2007 Nissan Primera P12.
After adding dynamat on the doors, they fell significant heavyer.
After adding on the trunk lid, it required more effort to lift the trunk lid and it was slaming hard on closing.

I removed the dynamat from the trunk lid after 1 year of wife's complains... She had trubles lifting the trunk lid when going to shoppings

On Primera, there was NO sound difference.
Consider that there's no comparision betwen Primera P12 and G37 sound isolation. G37 is waaay better than Primera.
So if there was no difference on Primera, will defenetly be no difference on G37.

Anyway, is your car and your money... you can try it if you want...

 

good advice!!! might reconsider

 

Did the trunk floor and it made a huge difference inside the car. Haven't bothered with the doors because I'm satisfied so far.

 

did it drown out the exhaust?

 

trunk floor....yes
lets do it..
thanks for the info Elco...from romania.

 

how heavy is this stuff.. isn't it like insulation??????????

 

I think many of you are informed about sound deadening. Simply putting on deadener mat (especially Dynamat) won't make the car quiet.

First off Dynamat sucks. Look into Second Skin. Better product and their Damplifier and thicker than Dynamat Xtreme. Their pro line is worth it too IMO. Hit up Ant from Second Skin and ask what you should buy and where to apply based on your goals. Rudy's stuff is also great from Sound Deadener Showdown - Your Source for Sound Deadening Products and Information (if it doesnt work just google it).

Deadener mat is used to reduce vibrations. Vibrations occur from air, sound waves for example, when they resonate against panels, whether it's metal, plastic, whatever.

What you want for metal on metal, plastic on plastic, metal on plastic is something that stops rattling. A foam like product would be best for that. If you want to reduce road noise this is what you'd typically do for the doors (using second skin products..only referencing because that's what I use). Inner shell of the door with a layer of damplifier pro, then overkill pro. Outer shell of the door gets a layer of damplifier pro and then a layer of luxury liner pro. On the inner door panel, some liquid deadener, spectrum or spectrum sludge. Luxury liner pro is used to reduce road noise.

When trying to reduce road noise, the parts best applied are where the metal is thin. Like the rear wheel wells, doors, quarter panels, etc. Using deadener mat does help, but it's not as effective as what i've previously mentioned.

The weight it adds on isn't all that much either. People tend to over-exaggerate it. You realize that going from OEM wheels to 20's will be an increase in weight, especially when going with wider tires as well. 80 sq. ft. of area is a lot to cover. That will weigh a tad under $50. Say if you got 4 sheets of luxury liner pro, you're looking at an additional 40 lbs. That stuff is heavier because of the material used. You will use up about 1.75 sheets doing the doors on a coupe. If you want to get crazy with deadening (floor, roof, doors, quarter panel, hood, fenders, trunk, trunk walls and floor, rear deck then yes you'll be adding quite a bit of weight. Results would be a super quiet car. Top of the line luxury status.

 

Depends on the product and brand. For a quick answer, using the Damplifier Pro I mentioned it's .6 lbs per sq. ft.

80 sq. ft. is enough to cover 37 coupe doors, trunk lid, trunk walls and floor and have leftover still. This particular model and brand of deadener will weight less than 50 lbs. And when I say both doors I'm referring to doing the inner shell of the door and the outer, not just the outer (where you take off the door panel and have that huge piece of metal). It makes a huge difference doing the inner shell because road noise is coming directly from there.

 

great... more research...

 

Just give Ant from Second Skin a call and tell him what you'd like to do. He'll fill you in on what you need, where to apply, etc.

 

yeah
i'll give it a go