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Any way to quiet some of the road noise in the rear of my 95na? I covered the floor and spare tire well with dynomat, now I wonder if covering the insides of the panels with foil backed jute would help any???
 

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Good one taka! Smart ass. Maybe a better stereo is in order. I could fill the car with music.
 

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i'm sure it would help a lot. the wind noise and vibrations would be less with dynomat. Just because its a sportscar doesn't mean it has to be roaring in the cabin. Sometimes I like to hear the engine, but road noise isn't necessary. It's not like you're ever going to be able to get a luxury sound level to happen, but full cabin dynomat might make a DD more enjoyable.
 

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Road noise in the Z32 is really tire rumble. Those tires are huge, the original design keeps insulation to a minimum to save weight - it is a sports car after all - and weight works against performance.

The smooth body shape does not generate much windnoise. The engine with the stock exhaust does not generate excessive noise. Yup! It's mostly tire rumble, in my opinion.

OK, any manner of things could be worn or bad to generate noise the car did not have when new. How many miles on your 95? Here are a few mechanical possibilities for excessive rear noise: worn or bad driveshaft support bearing....worn or bad or dry differential.....holed mufflers or pipes..... or excessively loud performance mufflers.

Get it to a specialist, have the underside inspected, and if everything is up to par, go back to your stock Nissam oem mufflers. Various brands of tires exhibit different road noise characteristics. Ask here or see the reviews at tirerack.com for input for a quieter brand of tire. Do not keep adding insulation - every pound steals performance.
 

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All things being equal, I have also heard that tires can be the biggest factor, when it comes to transmitted road noise.

As I understand, the rubber in a set tires can get hard with age, contributing to the noise factor. Apparently making sure that you get a freshly made set of tires is of some importance.

Perhaps just an old wives' tale....but that's what I have heard.

Bob
 
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