Whatsup everyone, i need to know how much RAMMAT/ ("dynomat") is needed to make my SC400 quiet inside! I have alot of road noise inside the cabinet and i want it to stop. And where should i place it to get the best results!

Thanks
Philly

 

It'll take a lot more than you think. Remove the rear seats and coat everything thats exposed. Then reomve all the lining in your trunk and lid- then do the same. Thats a good start, then track down rattles from there on out. I can't quote you exact sq. feet, but its will be severl large boxes of the stuff. The spray on stuff works great inside doors too BTW. It will cost a lot to do it right.

 

I've been on a hunt to kill road noise myself. So far I've used two rolls of ramaat, but could easily use a third. To get rid of road noise, you really need to use two different types of sound dampener. I don't think it really matters which types, as long as they are different materials. The two materials should have different absorbtion/dampening characteristics and this is what will kill the road noise. Ramaat and something fiber based (such as carpet padding) should work nicely.
As for location, I got the best results from doing my doors (ramaat on the inside door "skin", and carpet padding under the upholstry). Next best was ramaat under the front carpeting, all the way up under the dash (a real pain in the a$$ to do!!!). Next was ramaat over the trans tunnel (two layers) plus some carpet padding. Doing this got rid of about 80% of the road noise. Doing under the back seat, the back floor, and back shelf with ramaat (two layers), and carpet padding probably got another 5-10%. While I had the back seat out, I put ramaat on the inside of the body panels on each side of the rear seat, and as far foward from the trunk as I could reach. I've since done the trunk (no real difference inside the car, but the woofer doesn't blast spectators anymore ) I used my last scraps under the hood, which helped a little. If I could put some dampener under the wires in the kick panels, I think that would be a major help, but I'm not about to tangle with that mess of spaghetti!
Anyway, bottom line is I think my interior is a LOT quieter (I'd guess 90% more than stock), and the doors have a nice solid feel when they close, but it's a LOT of work. Make sure you knock on the panels as you work to test how effective your layer is. You should keep adding layers until you get a dull thump. (you'll understand once you start thumping )
Good luck and let us know how it goes!

PS - DON'T try to work with Ramaat when the temp is above 90 degrees. That stuff is a BEAR to cut when it's hot and sticky!