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Old 08-21-2019, 04:36 PM   #1
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Noise Suppression Project

This is what I have been up to on my van.





The older I get the quieter I like it.
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Old 08-21-2019, 07:29 PM   #2
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Looking good. I've been slowly picking away at the same project myself. I just need to finish the driver's door and driver's floor area, and the back end of the passenger side wall. It's not what most would consider "quiet" but it has definitely made a significant improvement in road noise reduction and was very much worth while! Now the doors have that satisfying "thud" sound when they close, instead of sounding like a tin can. It has made enough difference that I'm considering a different (quieter) muffler now, but as it is, I think the mud terrains may be the loudest thing... that I am not willing to give up! I can't tell how much difference my wall insulation has made since the factory plastic side panels don't allow me to stuff as much in there as your setup, but I like to believe that my heater and a/c are more efficient when running down the road.

P.S. those 37"s look perfect on there, without being lifted sky high like the few others I've seen on 37"s.
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Old 08-21-2019, 10:13 PM   #3
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Nice job man. You have a lot of patience and elbow grease into that thing. Rockwool looks surprisingly easy to work with. I had no idea. Can you school me on why moisture isn't a concern with it?
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Old 08-22-2019, 11:02 AM   #4
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There is a good reason i tried to avoid the word "quiet".

Before I did this the noise was obnoxious, the radio had to be up all the way to 50+ and you had to yell to have a conversation when traveling at speed.

Now the noise is reasonable, the radio sounds great at 40 and really loud at 50. conversations are easy even with the windows down.

Although the exhaust isn't that loud and it sounds nice and healthy, a quieter muffler would be great, especially when climbing long steep grades.

According to the manufacturer of Rockwool:
  • Excellent sound absorbency
  • Non-combustible, fire-resistant up to 2150 F
  • Easier and faster to install
  • Water-resistant
  • Made from natural and recycled materials - user friendly, no fiberglass in product
  • Better fit, flexible edge compensates for normal frame variability, cuts easily
  • GREENGUARD certified; chemically inert - CFC and HCFC free product and process
  • Does not promote growth of fungi or mildew
  • Friction fit to ensure optimum performance, no sag over the years
- According to me -"easy to take out"

Rockwool seemes like the best fit for my needs. Other products might be cheaper or have better R value, but those two aspects are low on my list of priority's. I only needed one package for the whole van ($51.98 at Lows) and insulating a windowed van seems a bit like a fools errand.
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Old 08-23-2019, 09:43 AM   #5
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Your Rockwool sounds a lot like a mineral wool insulation whose name escapes me now (sitting on a beach). Nonetheless the added benefit is that mice hate the stuff compared to their love for fibreglass batts.
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