I'm re-doing the interior of my fiero all custom Carpet, seats, dash, door panels, headliner, ect. and looking to get some dynamat or other sound deadening material. But unsure how much I need as far as square footage amount for the floor boards and behind the seats. And what brand is better. could someone please tell me how much is needed. And any other advice on this? Thanks. Ill be posting pics of it once I get it done soon. I already have the seats, carpet, and dash. Still need to order headliner and customize the door panels yet. Thanks again.

Dynamat is the most expencive of all of them and if you cover the whole flor and back wall it will take a master kit that will run you about 350.
their are other options depending on what you want to do. Hushmat works great and is a little less and you can also look in to others like Lizzard skin and E-Dead.
D.

I sprayed LizardSkin on my Formula. I'm not sure how well it works because I sold the project before driving it. However, I can tell you that one 2 gallon bucket was enough to do the entire engine compartment and the entire inside of the car.

This stuff is almost identical to the dynomat but its price is much better...
http://www.amazon.com/Rattl...id=1315920372&sr=8-8

I used the dynomat bulk pack (35 sq/ft total) and did most of the interior. This stuff will cover the entire floor pan for under 100 dollars. 2 packs will do everything else including door panels and roof with left over for whatever. Not bad for under $150.

[This message has been edited by Fieroseverywhere (edited 09-13-2011).]

I have heard dynamat is very heavy. Is this true? How much weight is added to the Fiero for a complete job? For the weight conscious how much less would lizard skin weigh compaired to dynamat?

Also, has anyone done a dB comparison for stock v factroy materials removed v lizard skin v dynamat?

Dynomat is like adding metal body panels to your plastic panel car. Dynomat is lead sticker paper that is roughly a 1/16 or so thick...

In my truck, I used the truck bed liner spray... 5 cans if I remember on the whole inside of the cab... 10 speakers total that included 2 twelves in the extra cab... Not one rattle.. Except the dome light falling off occasionally.

It comes in a quart or gallon also if you want to brush it on.. Worked great though and 5 or 6 bucks a can a while back was perfect... I'd do it again too..

Thanks for the input everyone. keep it coming ill be ordering it this thursday once I decide what product to go with.

quote Originally posted by Xyster: I have heard dynamat is very heavy. Is this true? How much weight is added to the Fiero for a complete job? For the weight conscious how much less would lizard skin weigh compaired to dynamat? Also, has anyone done a dB comparison for stock v factroy materials removed v lizard skin v dynamat?

I think the Lizard Skin or bed liner would be a much better option for the weight conscious. A proper application should weigh less, and work just as well if not better, as you can cover more area, and the coat should end up thinner than Dynamat.

Im also laying down por 15 as well. Then the sound deadener, carpet matting, then carpet. I already have everything but the sound deadener. Thats the only thing holding me back from getting most my interior done. I have por 15, carpet, racing seats and brackets (waiting upon delivery sometime this week) and custom dash all ready. I still need to order a headliner, diffrent steering wheel, and 5 point seat belts. The rest Is just doing fiberglass work to make it all fit. Then my interior will be done and I will post pics then should be another month or so for that.

FWIW, non of the deadner mats will reduce the road noise a gread deal. I have used Dynamat and other knock-off brands in the past and they all performed simmilar. There great for deadning the "tingy" sound from metal panels but are terrible for reducing road noise. The best matierial I have found for reducing road noice is wool carpet padding. After I installed it, it made a noticable improvement. After I installed the mat, you would be hard-pressed to notice...

BTW, I use the FatMat for deadning material. Its a fraction the price and performs simmilar to Dynamat..
http://cgi.ebay.com/50-Sq-F...Q5fDefaultDomainQ5f0

Just my .02

DynaMat is over rated and over priced.

Do some research on sound control techniques for various types of noise and you will see that it's not really even the right type of material to control most types of noise in an automobile.

quote Originally posted by unboundmo: In my truck, I used the truck bed liner spray... 5 cans if I remember on the whole inside of the cab... 10 speakers total that included 2 twelves in the extra cab... Not one rattle.. Except the dome light falling off occasionally.

Yup, that's what I was going to suggest. Well that or a 1/16th to 1/8th inch thick coat of rubberized undercoating spray. That's what my best freind used at the install shop he worked for in Illinois (especially for complex shaped surfaces). Sound deadener is really about adding mass to the metal to reduce it's ressonating frequency. How you add that mass can be acheived several different ways.

Awesome! Thanks again for all the info.

quote Originally posted by ALJR: BTW, I use the FatMat for deadning material. Its a fraction the price and performs simmilar to Dynamat.. http://cgi.ebay.com/50-Sq-F...Q5fDefaultDomainQ5f0 Just my .02

I used FatMat too, in my truck, but it's not on the road yet, so I can't comment on it's deadening. It does take out the "drumming" of metal body panels when I rap them with my knuckles. The foil should also help to block radiant heat. Last but not least, I doubt that it will ever come back off as the adhesive is mega-strong.

Here's the link where I bought mine:

http://cgi.ebay.com/50-Sq-F...Q5fDefaultDomainQ5f0

I would stay away from some of the "undercoats" in the interior as they may be tar-based and will out-gas the tar smell especially as they are heated up. Don't ask how I know this.

[This message has been edited by carnut122 (edited 09-14-2011).]

Back in the day, I used to work at high end audio joint. They used to spray rubberized undercoating on floorboards and doors... Worked pretty damn good and you could coat your interior with about 20-30 buck worth. Just a thought.

quote Originally posted by repnblvd: Back in the day, I used to work at high end audio joint. They used to spray rubberized undercoating on floorboards and doors... Worked pretty damn good and you could coat your interior with about 20-30 buck worth. Just a thought.

quote Originally posted by Khw: Well that or a 1/16th to 1/8th inch thick coat of rubberized undercoating spray. That's what my best freind used at the install shop he worked for in Illinois (especially for complex shaped surfaces).

It's actually a pretty common practice from what my freind told me. Well atleast it was back when he installed. He passed away about 7 years ago sadly. He was in the Navy and did installing as a side job. He was like a brother to me and I still miss him to this day. He actually gave me his MECP study book so I could take the test to be certified. Sadly, I couldn't support my family on the income for installing (wife and 4 kids) so I never worked in installing professionally after getting the cert. He also gave me a copy of all the N.A.M.E. videos they had at the shop (which was about 10 or so videos). I wish I still had those. I do still have Pro Box 5.0 software (which was also a N.A.M.E. product) loaded on my comp for enclosure design though.

[This message has been edited by Khw (edited 09-14-2011).]

So, what about this stuff?

http://www.quietcar.net/

It's a polymer that coats the surface like paint, and according to them absorbs noise and vibration better than anything else. Watch the videos, and click on the audio. I'd like to get some feedback on this, as I'm heavily considering it for my cars. I have a T-Top Fiero and a Del Sol with a Targa, and both get a lot of road noise. Thoughts?

quote Originally posted by mptighe: So, what about this stuff? http://www.quietcar.net/ It's a polymer that coats the surface like paint, and according to them absorbs noise and vibration better than anything else. Watch the videos, and click on the audio. I'd like to get some feedback on this, as I'm heavily considering it for my cars. I have a T-Top Fiero and a Del Sol with a Targa, and both get a lot of road noise. Thoughts?

Looks interesting. Seems more comparable to the Lizard Skin Ceramic Insulation coating than their Sound Control coating.