Dude...
For $140 are you sure they're not going to just stick it to the outside of the car? That's really cheap for that amount of labor. They're essentially quoting 2 hours to do what is a 5-7 hour job.

Dunno, that's what they said. This is a shop a lo of guys here on the forums recommend as well. A while back I thought he quoted me $140 just for the hatch, but this time he said it was including the door and would take like 1.5 hrs. Maybe I should confirm and jump on it before he realizes me messed up his quote?

That is an effen steal man. I would jump on it like you wouldn't believe.

In light of these revelations references are in order.

How about maybe, one small, well mannered dog? Definitely no on the goat! How were planning to fit the "farm" in the Z?

Strap them to the roof! Either the animals or the wife ..not sure which..

Wait a minute! You're not Mitt Romney are you?

Wow, took the Z out yesterday for the first time in rain (had no choice) and it sounded like I was in the damn shower. So loud when the ground is wet and its raining.

wat??

Yep. Welcome to the club. The only plus side to this is since the OEM tires aren't exactly all season, the louder the water noise, the more you need to be cautious driving.

The main noise comes from the front area of the wheel well. I proved this the other week when washing it. I sprayed water with a hose all around the car; underneath, on the doors, on the rear fender, under the back, etc etc, then in the wheel wells themselves. When that spray of water hit the upper front section of the wheel well, it was like a huge twanging noise in comparison to all the other areas. There were other places that made noise where you could tell it was, well, thin sounding, or tin like. But the upper front of the wheel well is where it really sings loudly. And all this AFTER I've installed the Fatmat material, 2 layers to that area inside.

Like I've said before here, I think the next logical step would be to paint rubberized sound deadener paint (like the stuff Fatmat sells) to the wheel wells (on the outside of the car). This way when rocks and water hit, it's hitting a somewhat "bouncy" surface, not just straight up metal sheeting. You can put it on with a household paint roller, so a few coats should get a reasonable thickness to have some affect.

Right now I'm much better than before, so I'm not sure I'll ever do the paint. The pebble and water noises are still there, but they are lower in tone and not nearly as harsh or noticeable. Only time will tell, if i feel the need in the future.

No comment..

I didnt know this...I am curious as to why this is?

Normally in say, my Murano, I can't really hear the water noise. It's up to my sight to see how much water is actually on the road, and to drive accordingly depending on my speed and the conditions. Being a Murano with all season triple tread Goodyears, I don't really drive it sportingly, so the only thing I usually need to worry about is highway hydroplaning. The triple treads get good traction in just about every condition, so no worries.

In the Z, you sort of get used to driving it harder, especially in turns etc. The Z also comes with summer only tires, that from what I've read aren't exactly great for anything other than dry pavement. I'm sure it's very easy to get this car loose on wet roads (something I haven't tried yet myself). So the good news for the noise is, you can actually HEAR how much water you are driving in. You don't simply have to rely on sight; your ears can tell you if it's just a light spray, or if there is a lot of water on the road surface. The more water noise there is, the more conscious I am about not gunning the gas or taking corners fast. I guess everyone else doesn't have to be this way, but I think it's sort of a built in safety thing for your car, and maybe you.

Does this make sense?

Ordered my Dynamat bulk pack form Amazon and confirmed the $140 quote for install.

Yup!

Well keep us posted because that does seem really low..unless this is some guy that does this just as a hobby or is retired.. or intends to spray it on..

it's Amplified Motorsports which is a sponsor here and also referred by a lot of local members. I think he said it would take around 1.5 hours. Maybe they really have their system and technique down.

Maybe they have 3 or 4 munchkins working for them so they can all be inside the hatch area at the same time? ;)

There is NO WAY 1 person can do it all that fast and do a good, complete job. It's an all day job if you take your time and do it right. Now for the experienced installer, it won't take THAT long, but 1.5 hours; no way. Maybe 4 hours.

Does the kit you bought come with 9 sheets of 18 x 36 or something like that? If they do the complete rear, and do all the areas where the tinging plinking noise comes from, just the trunk area will take all 9 sheets. I had 10 sheets at about 18 x 40, and I had 1 sheet left over that I used to double up on the wheel wells. But again, I did the entire trunk, wheel wells, and back wall too.

yeah, it's the one bulk pack. he said it would be enough unless we were doing like an audio install or something than you would need more. Well, I guess I'll see. Now you have me wondering if I should get the door kit also for some extra mat and ask them to use it all up.

Dynamat installing now. So the reason I got such a good deal is because it is a packaged price since I am getting swift springs from them installed also. Regular install labor proce is around 300.

I suppose if they have several people all working at once they can have one person on each door and one one the hatch...well good luck and let us know..

Its really a shame that Nissan lets the problem go..I notice even the new Zs are getting the same review from professional reviewers..its too noisy!

I really think its to help differentiate it from the Infinity brand or to let them brag that the new Z weighs less than the old...

+1...... :iagree: Another thing too is that the Z is actually consider a sports car. So for weight saving they opted out of putting a 20 gallon (19 gallon) & less insulation.

He was way off on the estimate. He said 4 hours or less for dynamat and springs. The dynamat alone took 4 hours, maybe a bit more. So i guess I really got my money's worth in terms of labor.

Bonzo was right!

Did he charge you more? But now the question is : does this guy know what he is doing?

No, he didn't charge me more. I took some pics in process and it looks like he was covering the natch and doors pretty decently. Used a heat gun too.

He actually undercharged me by a bit. I picked up some post MAFs that I brought along to install as well since I was having all that other stuff done. He was going to charge me $20 for that, but forgot it at the end. So the final tally

Swift springs - $290
spring install - $130
Dynamat install - $140
post MAF install - $0
total - $560

I think it was a pretty good deal overall.

Plan to go back for brake lines/fluid drain.

That is a hell of an effen deal.

Well as I said before, for this price I could have driven to California, had a vacation and returned for less than what I paid. It cost me $1200 including materials... This is just so far out of line with what I paid, its incredible! Good for you!

WOW!!!!!!! :eek:

Even us morons get lucky every once in a while. :happydance:

Here are some pics I took during the install.

[IMG]http://www.the370z.com/members/bruce...5-img-6338.jpg[/IMG]

http://www.the370z.com/members/bruce...4-img-6335.jpg

Do the two big plastic triangular pieces in the trunk just pop off I'am assuming? Then the carpet just pulls off?

P.S. My Z hasn't arrived yet..

I don't know. I wasn't watching the entire time. I just stepped in to take some progress shots to post here.

Carpet first, then interior pieces, then foam, then spare.

Was wondering if mounting a product like Dynamat or Luxury liner pro to the top or underside of the plastic corrugated cover in the hatch would help? Sort of sandwich it between the carpet and the plastic cover maybe?

You would think that that would pretty much seal off the noise coming from below. Has anyone done this? iF so, what were your results and how much did you need?

It's somewhere in this thread about doing that.
I've got the plastic, base carpet and then the truck carpet so I don't know how much more I could pack in there.

:roflpuke2::stirthepot:I was referring to a different Bonzo...:):stirthepot::tup:

:rofl2:

:owned:

Cabin Noise - Now Reduced
 

Hello all. Just finished some 12 hours worth of sound damping (the whole rear hatch)
Purchased product from Canada (B-Quite Ultimate). I did a lot of research and this product comes so close to dynamite I had to try it. I used 43 Yards for the whole trunk so purchase the 50 Yard roll. This product is a butyl base and smelled slightly like a new tire. I have had loads of hot days and have not yet once notice any odor from the product. I did notice great noise reduction but read on. I also used the V-comp matting (2 Sheets) placed it on the entire lower back area under the spare tire, but not after the bracing and also cut a duplicate layer that covers the WHOLE rear truck (size of the rear factory trunk mat).
Also I added some B-Quite to the inner left tire wheel well . Started from the lower front of the well to 12 o’clock top. Then I covered that with Duplicolor professional under coating / sound deadener (from Advanced Auto Parts $7.49 can) used 2 1/2 cans.
Interior Sound from the Bose is simply amazing now. The bass hits clean and tight - I LOVE IT!!!
At around 35MPH to 60MPH I notice the rear tire noise still comes through but much less.
Now at 60-65MPH it is virtually gone. and I mean gone. My guess is due to the factory set camber.
Once you hit the 60mph mark the tire camber becomes more neutral and thus the noise is gone..
Any thoughts on that ???

I will have the camber brought to neutral just to test this theory.
(may require some adjustable aftermarket parts)
I understand that the Z is a sports car and will have less refined cabin sound. The point isn’t for people who enjoy that but to help those who are daily drivers and would like a quieter cabin..
I only have a 10 min ride to work, but during lunch many a times just go out and hit the bends and it is much more enjoyable now.
Thanks to all whom keep info flowing into the Z community….

Tire Pressure and Sound
 

Just wanted to do a quick update.
Cold Tire pressure was sent to 41psi rear 40 psi front. at 90 degree outdoor temp today.

I couldn't figure out why after doing all my mods was the inside cabin gaining noise.. Well it was because when it was 70 out when I did the install everything sounded great.. So I checked pressure at the local gas station (FORGOT MY GAUGE) and added some air. Well then the heat came on this week and the noise went up. Then it occurred to me my tire pressures.

Any how I took my digital tire gauge (accurate to 2 psi) and when out to check my tires.. at 65 degrees outside temp (cold tire) and the rears where 38PSI along with the fronts. I brought them back to 35 Psi cold and the cabin noise from the rear went down even more after a test ride. I could not believe how 6 psi in the rear would add so much more road hum.

ALSO from the sound deadening I did the rain swish noise was greatly reduce.
PS you will lose quite a bit of your exhaust note. (Time to get that back with and aftermarket exhaust)

- I will also have my camber reduced to maximums or as close to neutral as possible as a further test later this week.

Testing makes perfect!

Mwagner07 glad you finished everything up on B-Quite Ultimate install. I would agree that having the wrong psi (too much) would cause a lot of road noise.