k2we

I got a chance to drive around this morning with the windows up (it was 49 degrees out) and noticed the noise in the car from the road was quite high.. Anyone else feel the same way?? I was on a smooth, asphalt road with no bumps or grooved pavement.. Is this coming from the tires?? My 1996 GMC Yukon with almost 100K miles on it is 100% quieter.. Even with the big, oversized tires.. Any idea why??

Steve (k2we) Dobbs Ferry, NY

Touring/KY0/6MT/Mats & side air bags Just hit 375 miles

dvlad

Yes there is road noise. But you have to understand that it's not an SUV or Sports Sedan. It's a sports car. I have noticed that it is loud. But not to the point where it is unbearable. The car has hardly any sound insulation. Just look under the hood of your SUV. It will have a mat attached to the backside of the hood. But if you were to look at the Z, it doesn't.

z461

I think it has to do with the lack of sound insulation... If it really bothers you get some dynomat, and dynomat your doors and your trunk area, that will help A LOT... I did that on my old 3000GT too when I had the car, and it dropped the road noise by several decibals. Also, some of the road noise is caused by the tires... If I remember correctly the Bridgestone RE040's are pretty crappy when it comes to road noise. I would upgrade to some S-03's or preferably Toyo T-1S

XeroDgrees

Yea just add some dynomat and that will queit the whole car down...

I am going to add it all over the car where ever I can... under the carpet and wheel wells...the doors are obvious and the trunk.

XeroDgrees

yea alot of it come from the tires... I have the same exact car as my girlfriend and she has toyo proxes and I got pirelli p7000's

Definately love the toyo's ride and low noise... The pirelli p7000's make alot of noise...

k2we

Thanks for all the replies.. I've owned sports cars for over 30 years and this has the loudest road noise.. My early "Z" cars (1970,71 & 74) were much quieter.. By the way, my 1974 had triple Weber carbs, and the full interpart header/exhaust system.. The car was really loud under acceleration.. I'm sure the low profile tires are the main reason but I think the bar between the shock towers isn't helping either.. The lack of insulating material is another factor.. By the way, my 1996 Yukon has no insulation under the hood..

I'm 100% satisfied with the "Z" car..

Steve (k2we) Dobbs Ferry, NY

Ray

how do you attach it? Does it go on the bottom of the doors or inside?

emu29

What is it and where can you get it? It appears that some have used this in past cars and that it works well. Where would one place dynomat in the 350Z, as I assume it is sound proofing matterial of some kind? Can it be custom cut and is it self sticking?

Thanks for a reply.

rouxeny

Hmm, I'm surprised. One of the first things that struck me about the Z was how quiet it was at speed. Cruising on the freeway at 80 is no big deal in terms of road noise. At least, not to me. Sure, it's a little louder than your average Lexus LS430, but then again, shouldn't it be? I was actually a little disappointed at first, but I've come to enjoy the peace and quiet.

Pretty much, once speeds go above 50 or I get on a freeway, the windows go up. In the city, I leave the windows down to listen to the engine sing.

Anyone2u

iTrader: (1)

I'm surprised no one has mentioned driving on a wet and rainy road. The sound was so loud that I thought I had left the hatchback open. I actually stopped the car, got out, and reclosed the hatch. It finally dawned on me how close the rear tires were in relation to the drivers seat, coupled with the lack of "insulation", after I started driving again.

2003z

iTrader: (7)

I think its really fairly quiet. As far as the tire noise, give them about 1000 miles and they quiet down a bit. Both on the Z and the IS300 the sound level went down.

ITZBITZ

Sorry, but I think it's quiet as my wife's Maxima SE. In fact, the suspension is quite similar in bump handling as well.

The 350Z is a very quiet, comfortable sports car. If you think it's loud, go drive an S2000, Corvette or MR2 Spyder.

Boomer

For a hatchback, I think the Z is pretty quiet On the other hand, I am surprised at the clunky tires. In 75 degree weather they still have to warm up and after they do, the noise level goes down. I really wish I had a chance to trade out the tires before I took delivery. Oh well, they will be worn out in 15,000 miles and I can get some better tires then.

brackethead

I'm the camp that thinks it's relatively quiet inside. My previous car was an Integra GS-R, and that car was loud inside. I've driven my Z now on 3 trips between DC and Cincinnati (500 miles one way, 1500 total) and I'm surprised at how good I feel when I arrive, compared to driving the Integra.

Also, I noticed that I can keep the stereo volume very low when cruising at 75+ mph and it still sounds clear, even with the good bit of tire roar.

Personally, I would like to hear more of the engine in the cabin! You can barely hear it, windows down or up. Well, maybe "barely" is an understatement, but you get the idea.

z461

You basically put the stuff on bare metal on the inside of the doors, and in the trunk area. Then you heat it up and it molds itself. Later if you need to remove it just peel off. I plan on putting some in my trunk sometime soon, I'm just kind of lazy right now. When I got my stereo install they did the doors already and some of the rear area near the wheelwhells. It helped tremendously, but it's still sort of loud from road noise in the trunk area. I will also change tires when I change my wheels in 2-3 months. Toyo Proxes are usually the quietest with the highest performance with Bridgestone S-03's coming in slightly behind (for road noise).

XeroDgrees

You beat me to it...

basically just remove all your plastics and interior pieces and place the dynomat on the metal surface... the dynomat is really sticky and you can cut it yourself and apply it or use the roller.

Depends on what dynamat you go with... But I can get this stuff at cost! So, I plan on doing an all out job and making this baby as noise proof as I can, I also know that this will add some weight but oh well, I'll lose weight by other means in the car!

z461

I would estimate with lots of dynomat around 50-60 lbs you'd be adding.. This would be doors, full rear hatch area, and area behind the driver and passenger on side (pillars). Take out your spare and the net gain will be like 40 lbs or so, just like if you were a heavier person. For me at 150 lbs that wouldn't be such a big deal...

John

iTrader: (17)

Has anyone noticed a whining sound at around 82-87mph?