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brontosaurus
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You are going to need to be a lot more specific in what you want improved. Reducing NVH and making a car more comfortable are two very different things. It is all subjective as well, so please tell us specifically what trouble areas there are, and what things specifically bother you the most. Every issue has a different solution. Reducing NVH, rattles, and increasing comfort are very complicated issues.

Please list:
-What suspension you have, and how many miles on it? Be specific as possible down to the bumpstops and tophats.
-What seats you are using?
-What motor mounts, bushings, and diff mounts you have installed and how many miles on them?
-What tires and wheels you have? Were the tires roadforce balanced?
-Your current ride height?
-What alignment specs you have?
-Still have carpet and insulation?
-Do you use a hardtop or softtop?
-Any chassis braces, cages, or rollbars?

Then please list any other misc aftermarket stuff like suspension arms, exhaust, headers.
 

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177 Posts
I'd just dyno mat the rear deck or whatever the **** its called, maybe the trunk too if I felt like spending money. I think that would cut down on noise a good bit
 

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Just hoping people stop dicks n look into the actual question. To me myself it is quite SIMPLE to make such an uncomfortable car at least rides ’better’.



I have sound-deadening materials all-around the firewall, wheel wall, cockpit, door panels and trunk area in my 2004 MSM. It really made a huge difference. You will never expect how bad vibration is inside the trunk. There is no sound deadening inside the Miata at all, basically, anything adding to it can reduce the noise. Btw all these things have only 25 pounds. Definitely worth it



A set of nice quiet tires also help a lot. But mine still running performance summer tires just make it fun to drive.



Smaller final drive is more suitable when cruising. It reduces rpm and has a better fuel economy. The MSM has a way to short gearing so I have a 3.6 instead. It makes the rpm drop from 4k to 3.2k-ish under 75mph.



Also, I have the bride racing seats. It has a lower sitting position and my neck feels way better.



I think the next step should reinforce the chassis rigidity. It is always the weakness that all convertible has. Frame rail, rear strut tower brace, Torsen bar brace, rear subframe brace, cockpit brace, frog arms, probably I will try everything fit to my car.



Don't ask me why. Maybe I am a noob. Maybe I am crazy. Just sell my 650i for storage and money. Don't get me wrong. I'm not looking for something like a luxury Germany sedan. I have 50km to commuting EVERY weekday and there is some really nice road. Just want to drive a fun car but the NVH is a pain in the ass. Still working on my own car!



Well. The cheapest way should be buy yourself nice noise-canceling earphones haha
 

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Earphones take a lot of the feel away; but would not mind having a bit less NVH too. Care to share what type of materials did you use? I plan a combination of stick-on mass damping on metal panels (25% coverage), plus a layer of 12mm closed cell foam on top. MLV would work best, but it is kinda heavy. There are also "composite" sheets (closed and open cell foam layers) that you can use. Also, I plan on buying a roll of roof polyester insulation mat to fill in the cavities on both sides of the fuel tank, as the boot acts as a huge bass cabin on NA/NBs
 

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Mods, could you please take this clown off?
 

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I like to bring in-the-shell sunflower seeds, as something to snack on that will keep you alert but doesn't fill you up or make a mess. Have a small garbage can in the passenger seat or just behind it for trash. Also, a roll of paper towels stashed somewhere in case you have a spill... since your meals will probably mostly be eaten in the car. Bring a bunch of music that you like, that keeps your attention, and isn't sleepy-time. Bonus for audio books. Wear the comfiest clothes you have. Be mindful of whether you tend to get too hot or cold in the car (especially if you're traveling with someone who likes to run the heat/AC differently than you) and dress accordingly. Wear comfy driving shoes like sneakers.

snaptube vidmate
 
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