all the "TAR" stuff and about how much do you think all of it weighs?






oh yeha BTW its painted.

-Ryan

 

do it on a cold day and get dry ice!

 

why remove it?

 

that's what im gonna do

just wondering if anyone has weighed it???


weight?

why not?

-Ryan

 

Sound deadening tar weighs about 22 lbs. Yes I have removed it. It is louder without it. Lots of cold ice and a mallet is fastest way to get it off. Air chisel works fast too. I used a hand chisel and hammer. Then wire wheel. Wipe down with turpentine/lacquor thinner then prime and paint.

 

I removed at least 35 pounds of the crud, last time. Maybe more. The best way to remove it, in my experience, is dry ice. Buy a few ten pound slabs, break them up into smaller chunks, spread the chunks all over the floor and cover them with rags. Wait an hour and the entire chassis will be below freezing. At that point, the tar will be brittle and you can remove virtually all of it in big slabs (just hit it with a hammer), scraping whatever little chunks remain. This is ten times easier than heating and scraping the nasty gooey mess that tar becomes when heated up.

 

Listen to Blake. Ive done 2 cars (84 and an 85). I weighed it at about 25lbs and 30 IIRC on the first one.

 

Unless you're a hardcore track or drag racer, then I can understand removing it but if it's just a daily driver you'll more than likely regret. Noisey as hell.

 

Exactly.

 

Love the REPU! Wanna trade for my 84 GSL SE?

 

Cool

 

I did mine in the middle of winter in the non heated garage with a big hammer and cold chisel. No dry ice or anything, worked great. Like said above, a little wire wheeling and laquer to clean it up then paint. It weighed 27lbs iirc. I removed mine in order to find and fix rust more than anything else. Its gonna be a daily driver when done, is it really that much louder?

 

It'll prolly rattle like a tin can. But fear not, some brown bread or other acoustical matting will bring it right back quiet I bet, and better if you cover more of the tin.

 

Are sound proofing alternatives available that have a better weight to sound reduction ratio available?

That is, can I put something else in that either will A.) Weigh less with similar sound reduction or B.) Weigh the same with MORE sound reduction a'la some sort of Luxo-Barge.

 

I did a little research on just that a while back.
Did a search on aircraft sound insulation.
I found a site a that had different types of sound absorbing foam for different frequncies. I wanted to find the loudest frequencies and deaden them, but it's way down on my list of things to do.

Examining a 280z in the junkyard one day I noticed the rear is covered by one big peice of molded foam, smooth on top and molded to conform to all the irregularlities on the bottom. Looks very effective, but Iv'e never ridden in one.

Here's something I found doing a quick google search ,

http://www.soundprooffoam.com/melamine_foam.html

Steve.

 

v-blok made by cascade audio. it comes in tubs raging from 1 gal-5 gal. its kinda like bondo(gooey paste) you can spread it on by hand,brush or thin it down and spray it from a paint gun. i think it weighs about 7or8 lbs per gallon and a gallon will be more than enough to do an rx7(unless you do multiple coats). for example i used about 4 gallons to do a 62 4door impala that includes the firewall,floorboards,doors(inner skin and behind the door panel)rear deck,behind back seat,and trunk(every inch of it). and this was also done with multiple coats.

http://www.partsexpress.com/webpage....=2&rak=cascade

 

Here's another,

http://www.soundcoat.com/aircraft.htm