Quieting down the Scout 800 (lots of pictures)

[db1115]

Whats your plan for sound deadening on the tub Scott? The headliner looks really cool.

[Comanche Scott]

Thanks guys. For what it is, it took way longer than it should have.

Davis,
the tub will get "strategically" covered with the same peel and stick flashing material, then get carpet padding, and a dark grey outdoor nylon loop carpeting.
The new tub will probably get sprayed with something like Lizard Skin, and the underside will get a liberal undercoat. So it should not need much in the way of the flashing material.
There are enough materials left to do new door panels, so it will get those done, and some flashing material as well.

Scott

[Comanche Scott]

So today we took the dogs to the lake for a swim day. We put a dog blanket down on the floor, had a cooler, and some other assorted "over-pampered-pooch-supplies".
Same freeway, same speeds, no wind.
dB reading on the freeway was 69-70dB, with the loudest section being a rough stretch, that bounces stuff around, and that was about 71dB.
So, I think insulating the tub, and putting down the carpeting will definitely help. Sure helped with the exhaust noise.

Scott

[Comanche Scott]

Today the bed was cleaned out, and Peel & Stick flashing stuff laid down. Pretty easy to do. took about 3 rolls (12.5 sq'/roll).
Went all the way up the sides, and across the bottom.





Took a ride to see the effects.
In town at ~ 40 is still about 60dB
On the freeway at 70 is down to ~ 71dB

So what I noticed:
Even though the dB is down by 3dB at freeway speed, it doesn't really seem like the noise level is less. This could be because I haven't been able to do this back to back. Fact is, it is down by about 4dB.
That said, the noise used to seem like it was 360* surrounding. And now, it seems like it is louder from the cab portion. Like the "fader" adjustment on a radio was biased towards the front.
The exhaust note did not seem quite as droning. The tone is slightly more muffled.
I also hear the tires a lot more in town now. I used to think they were fairly quiet.

The Peel & Stick is very reflective, so I am interested to see what happens with the jute padding, and carpet.
Then I'll get started on the cab portion.

Scott

[TUK101]

The jute padding and carpet will help a bunch because it will absorb some of the noise and help to keep it from bouncing around. It will also help to absorb some of the vibration.

[Thomas]

---Only one problem with jute backing is that it doesn't play well with moisture. I would opt for some patio if not auto carpet. The deadening mat you have should be enough for padding already. ~edit~ sorry, I see now you only used metal-backed vent/duct tape ~/edit~

---Some 10" subs with slight delay will help too... lol.

[joelweb]

Great thread.

I'd also consider putting some hood insulation on the underside of the transmission tunnel. All the Scouts I have owned send a lot of noise through the tranny tunnel and cover.

The wind noise is a tough one to combat on all Scouts. New seals and properly set doors should help.

[Comanche Scott]

Great input guys.

the right name for this stuff is called Peel and Seal. It is a flashing material. It is comprised of a 40mil rubberized asphalt adhesive back, two layers of a polymer film, and the top is aluminum composite foil. It has received some great reports for "sound proofing". And at $17 for 12.5 sq' is pretty cheap.
I bought this stuff at Lowe's. Here's the website:
http://www.lowes.com/pd_154017-81326...d=10151&rpp=24

I found a place that has the jute felt pad 40oz in a 3/8" for a reasonable price, with free shipping. So I am going to try it for the bed, and sections of the cab that the fitted carpet doesn't cover (like the firewall, and kick panels). I have a Nylon loop indoor/outdoor carpet to lay in the back.

There is a carpet place that makes a replacement carpet for the Scout 80/800, and for an extra $59 will include a "Mass Back" backing material, that is a thick sound deadening rubber type material.

So those are the next steps. Probably be a week or so before the felt pad gets here.

Scott

[Thomas]

Originally Posted by Comanche Scott

Great input guys.

the right name for this stuff is called Peel and Seal. It is a flashing material. It is comprised of a 40mil rubberized asphalt adhesive back, two layers of a polymer film, and the top is aluminum composite foil. It has received some great reports for "sound proofing". And at $17 for 12.5 sq' is pretty cheap.
I bought this stuff at Lowe's. Here's the website:
http://www.lowes.com/pd_154017-81326...d=10151&rpp=24

I found a place that has the jute felt pad 40oz in a 3/8" for a reasonable price, with free shipping. So I am going to try it for the bed, and sections of the cab that the fitted carpet doesn't cover (like the firewall, and kick panels). I have a Nylon loop indoor/outdoor carpet to lay in the back.

There is a carpet place that makes a replacement carpet for the Scout 80/800, and for an extra $59 will include a "Mass Back" backing material, that is a thick sound deadening rubber type material.

So those are the next steps. Probably be a week or so before the felt pad gets here.

Scott

---Mastic products used to emit nauseous, if not toxic, fumes but just from a glance it seems the company out of Aurora (home of Wayne's World! Party on! Excellent!) has pretty much addressed this issue with most of their line. I didn't do extensive research, I would look for MSDSs, especially in the emissivity of such gasses during exposure to heat/flame... and ensure good* heat shields are in place by exhaust.

---As for the jute; Jute is a vegetable and you must make sure the adhesive that bonds the fibers is water resistant... even though the jute isn't. Wouldn't want you to have your project fall apart, but more concerned with black mold under your carpet because you got caught in the rain one day and it seeped into a seam/corner.

---Wish you the best on this. I couldn't imagine a Scout so quiet that I could differentiate the sound of a cricket and body panels rubbing.

[cv_scout]

I am also in the process of quieting down my scout. It started as a mission to cut down the exhaust fumes coming into the cab (the lady wasn't so fond of those). Using a good seam sealer to touch up any holes/cracks in the firewall and tub before installing the insulation made a surprising difference. I also lined the bottom of the transmission tunnel cover and made a gasket for it.

Working on my headliner now so appreciate the thread.

Cheers,
Casey