Re: Re Road Noises

["Steve Rubano" <srubano@xxxx>]

Don
I know the effects that lead has with blocking sound, but I don't 
think it is a wise solution to put it on a sports car or any other 
light car. The material you are talking about was meant to be used in 
RV's, buses, trucks, ect to minimize the amount of noise from the 
deisel engine and or electric generators. These trucks can handle the 
extra weight that the lead sheets would add. Adding lead sheets as a 
sound barrier to block road noise on a car in my opinion is not a 
good idea. I understand that you want to stop road noise, but it 
isn't that loud that it would warrant the use of a lead foil? I am 
one to look for lightening the car....not adding pounds to it. I 
think that good neoprene type sound barriers work very well to dampen 
the road noise when placed under the carpet of the vehicle and safer! 
You have to cut the lead sheets to size and depending on how it is 
cut will create lead dust...dangerous to your health for a regular 
DIY. Also when applying the neoprene sound barrier I suggest not to 
just drop it in and throw your carpet back down, I would advise in 
using adhesive to glue the mat down to the fiberglass floor so that 
the mat dosen't buckle and create little "chambers" between the mat 
and fiberglass. Also it will keep the mat from moving around under 
the crapet.

In any rate...I am just posting my opinion and it is up the the owner 
of their car to decide what he/she would want to put into it.

Steve

--- In dmcnews@xxxxxxxxxxx, "Don Ekhoff" <ekhoff@xxxx> wrote:
> Steve,
> 
> The lead foil/damping foam material is pound for pound a very 
effective
> solution. The lead will not pass airborn sound energy because it 
is non
> pourous and limp. Any energy hitting it and causing it to vibrate 
is
> absorbed by the associated foam. The reason I started this thread 
was to
> see if someone had done their homework and was marketing a kit. In 
the name
> of performance (of both kinds) I will take high tech lead foil based
> products any day.
> 
> Don
> 
> FYI; I spray undercoated the entire underside of one of my D's and 
could
> tell little or no difference in the amount of road noise that we 
are all
> familiar with. It needs to be thick and sorta foamy to be 
effective and
> Ziebart and such is this and really only for corrosion (although 
they
> advertise for more).
> 
> 
> ----- Original Message -----
> From: "Steve Rubano" <srubano@xxxx>
> To: <dmcnews@xxxxxxxxxxx>
> Sent: Monday, December 18, 2000 7:35 AM
> Subject: [DML] Re: Re Road Noises
> 
> 
> > Lead?! Why would anyone want to use lead for a sound barrier on 
the D
> > or any car for that fact!! You know how much weight you would add 
to
> > the car? That would cause the car to have LESS performance 
(slower,
> > crappy gas milege..etc) which is something you don't want. You 
could
> > also damage your engine and/or tranny with the added weight by 
making
> > them work harder than they should be. 

>SNIP<