Quieting down the Scout 800 (lots of pictures)

[Comanche Scott]

Planning on a 3+ day trip over the Mojave road, late March - early April (hopefully to coincide with the desert bloom). So instead of starting on the 4BT swap, I figured it would be a better idea to work on quieting down the ride. The Scout is really dependable at this point.
With that in mind, I thought it would be cool to get some sound measurements, starting from basically stock, and seeing what kind of effect, adding deadener, and insulation / carpet, etc. can have. So I'll pick up a cheap decibel meter, and post to this thread as I go.

Step one is to get back to stock!

Still haven't got the top or the hood back from paint yet, so I figured I'd start with replacing the felts and window guides.
The doors are so rusted, that a large part of the day was drilling out broken screws and bolts. I'm going to have to do some reinforcing in a few areas, as it goes back together. Fortunately these doors and tub are temporary.
Anyway, here are some pictures from today. sanded down the rust, and painted the window frames and top trim piece. If the paint sets up well enough, I'll start installing the felts tomorrow.
Here are some shots from today's progress:



interesting replacement part. Actually worked very well. e-clip and washer




Parts hanging in the heated garage to dry. I moved the windows onto the workbench for the warmth as well.

[Robert JetFxr]

If you have any issues going back with the "C" clips, LL dealers have new OEM clips. Looks good, if you are going to use a 4BT, I would scour the JYs looking for the sound insulation used on a Power Stroke fire wall and under hood. That will be your best bang for the buck as far as quite goes.

[Comanche Scott]

Thanks Robert.

Great idea on PSD insulation. IIRC Guido used this on his build as well. It looks like there is enough room behind the 304 that I may be able to install it before the swap.

The 4BT is going to be fun, but that won't get started until after we return from the Mojave Road trip. I plan to do some major sound deadening to the engine itself, before the install. The 6BT crowd has some very nice engine quieting accessories available. some will transfer over to the 4BT, some will not. So there will be a lot of fabricating to do.
Just bought an HE341 Turbo, and noticed it's missing the anti-whistle ring. For the life of me, I don't understand why people take that out... So now I need to try and find one.

In the mean time, I'll insulate the tub, and top. I already started building a headliner, before the top went off for body and paint work. And I also plan to insulate the hood.
The interior will get jute pad, carpet, door panels and new body mounts, so it *should* be pretty decent.

The meter will tell...

Scott

[Robert JetFxr]

Scott if you really want to quite down the inside, use a felt saddle pad (about an inch thick) for the firewall sound proofing on the inside. When I did the 7.3 in my Travelette that worked better than anything I tried. I did the inside of the firewall with Duramax not much help, then I did the felt saddle pads and they worked very good under the carpet and on the fire wall.

[Comanche Scott]

Awesome idea Robert, Thanks!
I'll start checking them out. My Girlfriend's Daughter-in-law grew up on a ranch, so she'll probably have a good idea of where to get a good deal.

What did you use to keep it tacked in place on the firewall?

Scott

[Robert JetFxr]

I used 10/32 screws through the existing holes that were where the factory pad used with clip things. I bought very long screws and used them to hold sound proofing on both sides, the cut them off after I had the nuts tight. I also used large fender washers on both sides to keep everything in place. For what it's worth I also used a very heavy coat of Hurculiner before I installed anything to prevent rust issues.