MX-3.com

jschrauwen wrote:

chew* wrote:I'm using a new innovative truck bed sprayable liner called REFLEX. You might want to look into it. They lay it on 1/4 inch thick.

How did this work out for you chew*? Ease of installing?, Noticeable soundproofing differences? Before and after?

Ease of installing is dropping off the car and getting it back the same day, Providing that you gut the interior before dropping off. It cost a little bit more since they had to mask off a lot more stuff and add to the fact they thought i was nuts. Noticable differences were huge as far as sound quality goes. SPL hasn't been measured as my meter maxxes out at 150db and i peg 150db before and after application. Cost is less than full dynamat coverage and the coverage is better than dynamat as obviously spray can get into crevices that dynamat just can't be crammed in. Here's a link.

http://www.reflextruckliners.com/Reflex/Default.aspx

quiet as a mouse even with an exhaust leak.

I'm using protecto wrap roof and gutter tape, which worked very well if your doing it on a budget. comes in 4/8/12" x34' rolls I think it was.

I got 2x4" for $22 and lined the doors and floor of the trunk, and under the back seat. Pretty big difference. It's quite easy to use too. Got the idea from the miata.net forums when looking to reduce the booming resonance of the sport exhaust through the trunk of my MX5. Lked the result so I am doing the same in my MX-3

here's what it looks with all the interior trim taken out of a new MX5

http://forum.miata.net/vb/attachment.ph ... ntid=29682

The tape itself http://forum.miata.net/vb/attachment.ph ... ntid=29679

they also used a layer of reflectix to deaden the sound a little more, but its the tape that makes the most difference.

when it comes to the dynamat xtreme it's main design is for sound deading but it's more expensive due to the alumim top it provieds a bit of insulation for your car, you notice it more come winter time only if you have striped out the interor and laid it down from the fire wall to the hatch! most of the sound deading out there wiether it be dynamat-brown bread-b-quite-ect... it all works the same and is made of the same componets what you want to look for is the weight that it will add to your ride yes the more weight it has the more it will deaden the vibrations in the car but it will affect your preformance and yes to some ppl this is important so don't even start with me on that. i myself have install almost every kind of deadening there is and for a area like the mx you will save a lot of money by using a) the spray on for tight spots like the door and the rear side panles and then using mating for the headliner and floor this way you have the added deadning to the doors and floor but you'll also notice less heat that normaly comes from the exhaust and tranny

But thats my two cents on the subject


Reaper
Greg

SuperK wrote:So I'm looking at some sound deadening materials for my car - full coverage.

Dynamat Xtreme looks like a great option, but I'd like some feedback on people who's preferrably tried this.
If anyone has experience with other sound deadening materials that would compete with Dynamat Xtreme, I'd like to know myself.

So far, All I really see for options is genuine Dynamat Xtreme, and eBay Dynamat ripoffs.

What's you's guys's's experience? I'd love to know

-Kris

I installed a Dynamat Extreme Trunk Kit in the back of mine. It covered everything but the floor, but i think the empty spare tire hatch helps for better bass (IMO) The stuff does work!! My next step is to install the door kits and I should be good to go!!

A FYI to those who might be interested, I ended up with this:




Viscoelastic deadener
Supercharged butyl based adhesive
Aluminum constraining layer

Thickness: 1.6mm (60mil)
Weight: 0.35 lb/sq. ft.
Size: 1 foot wide rolls
Price: US $130/50 Sq Ft (Shipped)

Acoustic Loss Factor ASTM E756 @ 200 Hz:
0.23 @ +0C (+32F)
0.26 @ +10C (+50F)
0.39 @ +20C (+68F)
0.32 @ +30C (+86F)
0.24 @ +40C (+104F)

Temperature Range:
-60C to +155C (-76F to +311F)

-------------------------------------------------------------------

Dynamat Xtreme:

Butyl based adhesive
Aluminum constraining layer
Thickness: 1.6mm (44mil)
Weight: 0.45lb/sq. ft.
Size: 18x32 in sheets
Price: US $250/36 Sq Ft (Not Shipped)

Acoustic Loss Factor ASTM E756 @ 200 Hz:
0.24 @ +0C (+32F)
0.26 @ +10C (+50F)
0.42 @ +20C (+68F)
0.26 @ +30C (+86F)
0.19 @ +40C (+104F)


Temperature Range:
-54C to +149C (-65F to +300F)

I'll be installing it in some time.



Acoustic Loss Factor: Higher numbers denote higher performance

SuperK wrote:Viscoelastic deadener
Supercharged butyl based adhesive
Aluminum constraining layer

Thickness: 1.6mm (60mil)
Weight: 0.35 lb/sq. ft.
Size: 1 foot wide rolls
Price: US $130/50 Sq Ft (Shipped)

Acoustic Loss Factor ASTM E756 @ 200 Hz:
0.23 @ +0C (+32F)
0.26 @ +10C (+50F)
0.39 @ +20C (+68F)
0.32 @ +30C (+86F)
0.24 @ +40C (+104F)

Temperature Range:
-60C to +155C (-76F to +311F)

-------------------------------------------------------------------

Dynamat Xtreme:

Butyl based adhesive
Aluminum constraining layer
Thickness: 1.6mm (44mil)
Weight: 0.45lb/sq. ft.
Size: 18x32 in sheets
Price: US $250/36 Sq Ft (Not Shipped)

Acoustic Loss Factor ASTM E756 @ 200 Hz:
0.24 @ +0C (+32F)
0.26 @ +10C (+50F)
0.42 @ +20C (+68F)
0.26 @ +30C (+86F)
0.19 @ +40C (+104F)


Temperature Range:
-54C to +149C (-65F to +300F)

It weighs slightly less, costs a quarter of the price, and offers nearly equal performance?!?! Where can I get it?

http://www.b-quiet.com/ultimate.html


It's a bit thicker, lighter and offers better performance in warm weather, as dynamat seems to perform better in less than room temperature.

Successor to Brown Bread.

I used a neoprene based sound proofing material -
like this one- http://cgi.ebay.com/ebaymotors/ws/eBayI ... 0161432934
I bought it bulk so it was a fraction of the cost and seems to be working well so far..

anyone ever try to soundproof from the outside/underneath of the car?

i used the bquiet stuff in my trunk and it did work and now they seem to have a cheaper better version so I am considering buying it again.

also is the black material under the hood of the v6 for sound and or heat?

Thanks

the under the hood stuff on the v6 is kinda for both.

It's the same material on the firewall, so it'll dampen (little) of the sound but it's mostly a heat barrier. It also is flame retardant and makes you feel itchy!
those who do anything to the outside usually relayer with the rubberized coating...
I would suggest using the bquiet on the hood if you're planning on reducing the noise, though.

SuperK wrote:So I'm looking at some sound deadening materials for my car - full coverage.

Dynamat Xtreme looks like a great option, but I'd like some feedback on people who's preferrably tried this.
If anyone has experience with other sound deadening materials that would compete with Dynamat Xtreme, I'd like to know myself.

So far, All I really see for options is genuine Dynamat Xtreme, and eBay Dynamat ripoffs.

What's you's guys's's experience? I'd love to know

-Kris

I basically raped the inside of my car with Dynamat Xtreme (Doors, Rear Quarter Panels, and entire trunk). I am assuming that you have a loud exhaust system and you car basically amplifies that the exhaust noise by 100. Anyways, It was probably one of my best investments. Dynamat is expensive but is definitely worth it. DO NOT GET THE EBAY KNOCK OFF BRANDS, they typically loose their stickyness after the first year.
Not only did the Dynamat help cut out on the Exhaust noise, It cut down road noise and helped the quality of my audio.
The main point that I am trying to say is if you are going to do something to your car, do it right the first time. Dynamat Extreme may be expensive, but you are definetly getting what you pay for.

I heard corvette uses balsa wood wrapped in carbon fiber for sound proofing their floors.
Is carbon fiber something that non professionals can buy and use?

thanks

what spray is used in the hard to get to spots?