Cabin noise

DrEvil

I've got the same noise. What is it?

Red__Zed

If anybody figures it out, please post up a solution.

370ZilverZ

No tire out there is going to lessen the road debris noise. If the Dynamat isn't enough, I'll spray some rubberized undercoating in the wheel well outside which should be more than enough to stop the tings and pings from everything the tires kick up into the wheel wells.
Tire and road surface noise may still be another issue to tackle. If it is, then I think I will try out a set of Continental Extreme DWS. I have heard good reviews. Since I have less than 400 miles on mine, it is not what I want to do. After a long road trip I have planned for later this month, I may change my mind on it though and change then out.

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BMW Z4

RiCharlie

I am getting those Contis tomorrow..will keep you posted..

370ZilverZ

I'd like to hear your opinion on the change of the tires. Do you have the Bridgestones now?

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BMW Z4

edub370

Roommate has conti's on his sti... lets just say that they are less than quite...

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kenchan

huh, my DW's are very quiet...

leeyeegue

I just put on Bridgestone RE760 tires... A lot better in terms of noise

370ZilverZ

Okay, I completed the Dynamat Extreme install and put the car back together.
The test drive indicates that this is worth the time, money and effort to install. The road debris was barely noticeable and what I did hear was muffled, so you didn't get the annoying tink tink like you are dragging several tin cans with rocks in them behind you.
You can still hear your exhaust with no noticeable change there.
Since weight was brought up several times in this thread as an issue. I only used 26 sq.ft. of material to cover the entire hatch. That is only 11.7 lbs. of added weight.
Pics will be posted in my journal.

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BMW Z4

brucelidat

Did you do the doors also or just the hatch? Does it seem like it would be easier to hear the radio and carry on a conversation now?

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370ZilverZ

So far I see no reason to do the doors. It is much quieter as far as road noise goes. I have an aftermarket exhaust, so that is still a factor for me, but if you have a stock exhaust system, I think you would hear the stereo and have a conversation very clearly with the Dynamat installed.

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BMW Z4

RiCharlie

I can tell you from experience the doors are the most important part..There is NO sound dampening in them at all..

370ZilverZ

Did you Dynamat your doors and get a significant change from what you get from doing just the hatch area?

How did the Conti's work out?

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BMW Z4

lpsscc

The one thing I noticed with my Altima SE-R was the Bridgestone Potenzas it came with did two things. First they were noisy as hell, i mean all four tires you could hear. If you think the Z is noisy it's more like a library next to the SE-R. Second the tires would not track on roads with slightly worn down ruts in them. Almost like riding a skateboard on a half-pipe. Up one side, down again and up the other side and back again over and over. Took a stiff grip on the steering wheel to maintain a straight line. In other words those tires were crap...

I replaced those with some Conti Extremes and the tire noise went down about half and the tracking was pretty much fixed.

So now I added a Z to my stable and the previous owner put some Yokahama S-Drive tires on the rear. The front has the bridgestones. I hear a lot of front tire roar and suprizingly the rears are quiet (no roar). I got a bunch of dynamat coming and will still do the back and doors like you all have done and maybe put some on the front or something as well if possible. I am certain changing the front tires to S-Drives will be a quicker fix though...

RiCharlie

Yes in fact I was very dissatisfied with doing just the hatch.. It made some difference but the combo of the hatch and the door made it much much better..

As far as the Contis go..i just had an hour or so with them..I dont see much difference in noise and if I had gotten rid of the originals while still new for the Contis I would have been seriously pissed..but they were worn and needed replacement..

I notice a bit softer ride and somewhat looser feel on the road..at least that is my first impression.. I'll keep you posted as to the performance...it was dark and I dont like doing any performance driving at night...I think I will have a better idea tomorrow..