Cabin noise

SurfDog

I put Dynamat all over my hatch area (both shock pillars and the latch area all the way up to the backs of my seats). Also I put some as far up into my left fender as I could reach (the right fender is not accessible from the hatch area)

It helped, but the car is still noisy.

now I'm ordering materials to coat the inside of the doors. I will see if that helps.

the guys that make GT Mat are offering free samples (10 ft square) of there product to members. you will need more like 30 to really get after the hatch and (I'm guessing) 20 or so for the doors (some is wasted when you trim the sheets to fit your panel shapes.)

Here is a photo of my Hatch as i was just getting started putting down the mat. I spoke with my dealer service manager and he tols me how to get all the trim out. (it is easy)
http://www.the370z.com/members/surfd...namat-put.html

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09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix

Pintsize725

Link to this?

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Tracie

RiCharlie

There is NO sound dampening in the doors..NONE at all..cover the inside of the doors and get some good quiet tires and the car will be totally different..

ped

Agree - I'm using Hankook Ventus V12 Evo and they are quieter than stock for sure.

Dpeters

I just put down the Second Skin product in the rear portion of the car and it made a little difference, but none to justify the amount of labor required to put it down. FYI: Pulling out the molding and trim in the back of the Z is a breeze. The only trick is learning where the pressure clips are so you pull in the right place.

I think I bought the Damplifier Pro 20 sq ft pack and still didnt have enough to get every little nook of the trunk. If you plan on doing the front of the car, I'd suggest much more than 20 sq ft.

NOTE: I'm not dissing the Second Skin product, I just think more sound comes from the front of the cabin and doors than we think.

Guard Dad

Dpeters,

Which "Second Skin product" did you use? Was It the Dynamat Exterme type product or was it Luxury Liner Pro? If it was Luxury Liner Pro did you follow their recommendations to install the Dynamat Extreme (sorry I can't remember the name of Second Skin's comparable prpduct, is that the Damplifier Pro, an asphalt and aluminum sandwich?) before installing (or did you even use) the Luxury Liner Pro?

I've done Dynamat Extreme in the hatch and doors and it makes a nice improvement but I'm ready for the next step which would appear to be Luxury Liner Pro so I'm very interested in the specifics of what you've done and the results obtained.

Dpeters

I used the 20sq ft pack of damplifier pro only. No supplimental products were used as I didnt want to add a massive amount of weight unless I could help it. I think I'm going to order more of the damplifier pro and possibly some of the secondary additions that compliment it to ensure I have a "sound" install (pardon the pun).

Guard Dad

Jackpac, which Second Skin product(s) did you use?

JACKPAC

Sorry for the late reply. I used second skin damplifier pro with some LLP on top of that. Cost around $230 I think.

chops

i drive a 2006 corolla as a daily driver and the road noise was killer with high performance tires and lowering springs (compared to the cheapo tires it came with). i coated all the wheel wells as well as the doors and road noise was reduced dramatically. although it was pricey, i think i paid like 60bucks for a gallon of the stuff. im thinking of using the leftovers to do the trunk area once the weather warms up (much easier to apply when the weather is warmer)

Zoren 370

Hey Chops any update on the noise level after you coated the trunk area? I might just do that... have my Z wheel wells coated by 3M not only it would protect my car from rust and stone chips it would probably lower down the road noise.

Guard Dad

Dpeters,

Just checked, Damplifier Pro = Dynamat Extreme. It took me 36 square feet to do the doors and hatch, no surprise that 20 square feet left you a little short. The noise reduction was nice but only made me want more.

I was wondering just how bad the noise from the hatch still was and what I could do about it, so a couple of nights ago I packed the hatch and the passenger footwell with blankets and fabric covered patio chair cushions and then ran some errands.

AND THE ENVELOPE PLEASE! Cushions in the passenger footwell had little if any positive effect. Packing the hatch area made an real difference and this was done with Dynamat Exterme already in place. You still clearly hear the changes in the pavement but the pebbles-on-sheet-metal sound that was so noticeable when stock had diminished enough that it wasn't an issue for me. I also found that I needed to lower the volume on the radio, the quieter interior made the old volume setting seem too loud. Not luxury car stuff but trending in the direction of Grand Tourismo.

The take away for me was that the hatch was still the major noise source and that I should concentrate my efforts, for now, in that area. Since I don't want to drive everywhere with a hatch area loaded with blankets and pillows (what might people think, I'm a little old for sleep overs!) my next move is probably going to be overlaying the Dynamat Extreme with Luxury Liner Pro. As you might guess I'm interested anyone's experiences with Luxury Liner Pro or similar produces.

Parrotguy

I have a 2010 roadster and I do not have a problem with interior noise with the top up, and I don't recall seeing any roadster owners complaining about cabin noise. In a way this seems backward - cabin noise is something many convertibles have, and in car reviews of rag tops they will always comment on interior noise. I think that this re-enforces the conclusion of Guard Dad that most of your noise is coming from the hatch area. The compartment in the Z that holds the top in the down position is enclosed, so sound doesn't come forward.
Nissan uses a double fabric top to reduce noise like the Z4 has, and it reduces noise from the outside.
Ironically the disadvantage in the roadster is that the "sub woofers" are mounted behind the top compartment and a lot of bass doesn't make it through. It would sound a lot better if those speakers were mounted right behind the cabin, but my guess is there is not enough room there when the top folds in.

RiCharlie

Well what you say makes lots of sense. I am not asking for Lexus quiet but one reviewer compared the noise on some pavement to a cement mixer and I have to agree! Meanwhile, I am writing this as I am getting ready to deliver my car to the audio installation store where they will add this sound dampening material to the hatch area. I will let you know but meanwhile thanks for the advice..

LunaZ

Get an exhaust and then you won't notice the road noise.
You also get the benefit of added performance and a small weight saving!

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