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Old 03-17-2019, 05:59 PM   #21
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I chose to go the path of MLV + CCF. Rather than lay them down separately, I bought a roll with them bonded together:

Privacy Performance Carpet Underlay

I bought it from www.jss.net, total cost was just shy of $300 with shipping.

I started the roll from the back of my EB van and ran it continuously up to the front footwells as one continuous piece. It fits perfectly between the wheel wells, and there's enough left over to go back and fill in the spaces on the side in front/back of the wheel wells, in the steps, etc.

I bought a datalogging sound meter so I could quantify the impact on cabin noise (what can I say, I'm an engineer), but unfortunately the timing worked out such that I didn't have a chance to do a 'before' measurement. Right now I have the PPCU all rolled out of the way for L-track installation, and I plan to take measurements before putting things back in piece by piece (including Noico 80mil butyl) so I can quantify the difference.

The l-track floor project has been a long time coming and the van was a work van with trunk liner sprayed on the floor but no other flooring when purchased, so we've been using the naked PPCU as our floor for over a year. It works surprisingly well, nice and soft underfoot, but the MLV top layer can gouge or get marked with white 'stretch' marks relatively easily.
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Old 03-17-2019, 06:24 PM   #22
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To confuse things further..I removed the factory insulation and then installed a layer of Thermozite (thermal/sound) insulation and then re installed the factory stuff. There was a noticeable reduction in noise from the 7.3L box of marbles.
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Old 03-17-2019, 08:30 PM   #23
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Quote:
Originally Posted by Kibo View Post
I chose to go the path of MLV + CCF. Rather than lay them down separately, I bought a roll with them bonded together:

Privacy Performance Carpet Underlay

I bought it from www.jss.net, total cost was just shy of $300 with shipping.

I started the roll from the back of my EB van and ran it continuously up to the front footwells as one continuous piece. It fits perfectly between the wheel wells, and there's enough left over to go back and fill in the spaces on the side in front/back of the wheel wells, in the steps, etc.

I bought a datalogging sound meter so I could quantify the impact on cabin noise (what can I say, I'm an engineer), but unfortunately the timing worked out such that I didn't have a chance to do a 'before' measurement. Right now I have the PPCU all rolled out of the way for L-track installation, and I plan to take measurements before putting things back in piece by piece (including Noico 80mil butyl) so I can quantify the difference.

The l-track floor project has been a long time coming and the van was a work van with trunk liner sprayed on the floor but no other flooring when purchased, so we've been using the naked PPCU as our floor for over a year. It works surprisingly well, nice and soft underfoot, but the MLV top layer can gouge or get marked with white 'stretch' marks relatively easily.
Thanks Kibo, this is very helpful. I found a similar product to what you describe but it was from a company in Australia and I wasnt up for doubling the price for shipping :-p but I will certainly look at what you mention as that is what I had in mind. My engineering mind is planning on doing the same, grab a DB meter and do a before and after, but my engineering gut says the MLV is going to perform better for sound deadening than the QuietRide system. But I didnt want to make too many assumptions had anyone else tried it.

I am a little sad that the other company closed shop, their foam for the side panels/pillars/above headliner sounded like a nice option as well. But I am sure other sell similar I will just have to do some looking. I am leaning toward the "do my measurements and piece together my own kit" side based around filling in any gaps that exist on the sound deadening side (dynamat) and then a solid layer of MLV/CCF

Quote:
Originally Posted by saline View Post
To confuse things further..I removed the factory insulation and then installed a layer of Thermozite (thermal/sound) insulation and then re installed the factory stuff. There was a noticeable reduction in noise from the 7.3L box of marbles.
Thanks Saline, this doesnt confuse things, at least not for me, this is a huge piece that most information I have found doesnt fill in. Between your path and the other poster earlier in the thread I have a few ideas for the doghouse now too. I knew that was going to be a key part of this whole process to get maximum reduction. Though only so much you can do with a removeable panel like that some is better than none.

I think as was mentioned earlier even now with what minimal work has been done by previous owners the highway side is not a huge huge deal but any more I can reduce it will be that much the better and more comfortable for conversation on long drives.

Thank you both for your thoughts and experiences they are welcome and helpful :-)
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