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murph_
Samba Member
Joined: January 16, 2021
Posts: 2
Location: Calgary
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 Posted: Tue Feb 16, 2021 8:36 pm Post subject: Re: Dynamat Sound Deadening Testing Before and After - Worth it? |
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Thank you denwood for doing this great research!  |
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erste
Samba Member
Joined: March 29, 2013
Posts: 1110
Location: San Francisco
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| Posted: Mon Nov 28, 2016 8:40 pm Post subject: Re: Dynamat Sound Deadening Testing Before and After - Worth it? |
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https://www.amazon.com/Dynamat-10455-Self-Adhesive...at+extreme
Dynamat Extreme 36 sq. ft.
I think you'll have more than enough with 72 sq. ft.
You don't need to cover the entire surface. At some point you're wasting material.
I just cut it into 3" strips x 4-6" long and spaced them a few inches apart, tapping the panel, and adding more until it sounds 'dead' everywhere.
I've done the rear hatch gate, full side panels and sliding door, front doors, front seating area, and a little bit onto the "firewall" (or whatever that panel in the front should be called.. bulkhead?).
I have 3 sheets of dynamat left of those 2 packs (18 sheets total).
The only areas I haven't done are the engine area around the engine cover, the middle floor, and the roof. The engine area already has something laid down from the factory, and to be honest I don't want to see a bunch of dynamat when I lift up the carpet. The middle area has a well-fitting pad and I didn't want to interfere with it.
I have a roll of mass loaded laying temporarily over the engine bay and the middle floor.
You might shift your plan a little bit and focus on the front of the cabin instead of the middle, especially the area around the wheel wells. Unless you're missing the molded foam for the middle area...
I looked into spraying something like lizard skin, but for me it was too much of a project - needing a spray gun and compressor and then having to strip the entire van and prep / mask all those surfaces. The dynamat / peel and stick route worked for me because I could work incrementally.
The Extreme stuff is pretty thin, and that makes it good for areas under the molded foam and behind wall panels. You might get some of the thicker stuff for the door skins.
I'm happy with the results and today my girlfriend said it sounded quieter (she didn't know I'd just done the front cabin).
On a separate but related note, I put down reflectix at the same time and the heater blows incredibly hot now. There are probably better options, but the stuff is cheap and I noticed a big difference in retaining heat up front. Just another thing to consider while everything's apart.v 
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igarrett
Samba Member
Joined: May 30, 2015
Posts: 15
Location: CA
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| Posted: Mon Nov 28, 2016 2:51 pm Post subject: Re: Dynamat Sound Deadening Testing Before and After - Worth it? |
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Amazing thread. Thanks for the detailed info
Anyone know how much I would need to cover
1. Middle section floor
2. Both middle side panels
3. Engine area
4. Both front doors
Gracias |
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kuleinc
Samba Member
Joined: August 10, 2007
Posts: 1604
Location: East Bay Area, California
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madspaniard
Samba Member
Joined: August 18, 2008
Posts: 3795
Location: Alameda, CA
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| Posted: Tue Mar 04, 2014 4:53 pm Post subject: |
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Yes, it does look like a kitchen sponge. Mine seem to be in good shape so I will leave them in peace. I tried pulling them out but I fear I will tear them apart unless I take out the front spoiler (air damn). They are just a simple piece of foam, your pool noodle will do go here, no need to call vendors to reproduce this part.
_________________
1991 Westy auto w/ Peloquin TBD
"The only difference between me and a madman is that I'm not mad” - Salvador Dali |
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rockfish
Samba Member
Joined: February 13, 2007
Posts: 740
Location: Palo Alto, Calif.
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| Posted: Tue Mar 04, 2014 10:09 am Post subject: |
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I found the same thing. It looks like an old kitchen sponge. Probably due for a replacement.
_________________
89 Westy
GW 2.5 5-speed trans
"It's what you learn after you know it all that counts."
- John Wooden |
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ewalt98
Samba Member
Joined: October 19, 2009
Posts: 94
Location: Corvallis, MT
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| Posted: Tue Mar 04, 2014 10:02 am Post subject: |
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| luVWagn wrote: |
| ewalt98 wrote: |
| So that explains how the mice have gotten in my van in years past. Do you have a picture of the foam? |
Does that allow ingress to the van (via the A-pillar)? I'm guessing the mice came in from your front-grill, into the airbox, and out through your vents. There is a factory plastic mesh across the air-inlet, but it does *not* fit properly, and there is plenty of room there for a rodent invasion. |
I'll have to check the screen, but I just had the grille off a few weeks ago while applying sound deadener to the front, and drilling out the heater box bolt that I broke, and I didn't notice the screen being too ill fitting.
Once, I saw a mouse jump up the wheel, then onto the suspension, and then it disappeared. I could then hear it in the dash area. This was in Canyon Lands, and I walked up the the van after camping for a few days, so I figured it had just started to build a nest in the dash area. The only place I could imagine it getting in back then (early 90's), on the ground in the parking area, was that hole. Never pursued it, but did get another mouse a few years later, and assumed it got in the same way.
Since I've been working on quieting the front of the van, I will definitely plug, or baffle, that hole.
Question: If not that hole, or the little air vent area, is there any other way a mouse could get in?
_________________
Eric
82 Westfalia Camper (Currently getting a little bit fixed up)
85 944
72 GT6
88 F350
03 F150 |
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Gunldesnapper
Samba Member
Joined: July 16, 2013
Posts: 147
Location: Murika
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| Posted: Tue Mar 04, 2014 6:52 am Post subject: |
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I'll check my 1990 this afternoon.
_________________
1990 Vanagon Carat "Pig"
USN RET |
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kuleinc
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Joined: August 10, 2007
Posts: 1604
Location: East Bay Area, California
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madspaniard
Samba Member
Joined: August 18, 2008
Posts: 3795
Location: Alameda, CA
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| Posted: Mon Mar 03, 2014 4:41 pm Post subject: |
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I will snap a bunch of pics when I get under the van again.
_________________
1991 Westy auto w/ Peloquin TBD
"The only difference between me and a madman is that I'm not mad” - Salvador Dali |
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Jake de Villiers
Samba Member
Joined: October 24, 2007
Posts: 5937
Location: Tsawwassen, BC
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| Posted: Mon Mar 03, 2014 2:39 pm Post subject: |
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| ewalt98 wrote: |
| madspaniard wrote: |
| Jake de Villiers wrote: |
| designer wrote: |
When you guys say you filled the A pillar with foam or whatever, did you actually "fill" the A Pillar; as in jam as much up there as far and thick as you could or did you essentially just cap it at the bottom to prevent airflow up and through?
Thanks!
-cc- |
You just need to plug it so that stops behaving like a big contrabass flute! |
I took a look at the bottom of my A pillars and it turns out both sides have a grey piece of rectangular foam that looks very stock blocking these openings. Maybe this is a factory upgrade in late Vanagons? Mine is a 1991. |
So that explains how the mice have gotten in my van in years past. Do you have a picture of the foam? |
I don't think that mice are getting in that way - the open tube just transmits a lot of road and wind noise up to ear level.
_________________
'84 Vanagon GL 1.9 WBX
'86 Westy Weekender Poptop/2.5 Subaru/5 Speed Posi/Audi Front Brakes/16 x 7.5 Mercedes Wheels - answers to 'Dixie'
@jakedevilliersmusic1
http://sites.google.com/site/subyjake/mydixiedarlin%27
www.crescentbeachguitar.com
www.thebassspa.com |
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luVWagn
Samba Member
Joined: February 21, 2008
Posts: 1342
Location: Snoqualmie (WA)
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| Posted: Mon Mar 03, 2014 1:47 pm Post subject: |
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| ewalt98 wrote: |
| So that explains how the mice have gotten in my van in years past. Do you have a picture of the foam? |
Does that allow ingress to the van (via the A-pillar)? I'm guessing the mice came in from your front-grill, into the airbox, and out through your vents. There is a factory plastic mesh across the air-inlet, but it does *not* fit properly, and there is plenty of room there for a rodent invasion.
_________________
'91 Double Door Transporter |
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ewalt98
Samba Member
Joined: October 19, 2009
Posts: 94
Location: Corvallis, MT
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| Posted: Mon Mar 03, 2014 1:28 pm Post subject: |
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| madspaniard wrote: |
| Jake de Villiers wrote: |
| designer wrote: |
When you guys say you filled the A pillar with foam or whatever, did you actually "fill" the A Pillar; as in jam as much up there as far and thick as you could or did you essentially just cap it at the bottom to prevent airflow up and through?
Thanks!
-cc- |
You just need to plug it so that stops behaving like a big contrabass flute! |
I took a look at the bottom of my A pillars and it turns out both sides have a grey piece of rectangular foam that looks very stock blocking these openings. Maybe this is a factory upgrade in late Vanagons? Mine is a 1991. |
So that explains how the mice have gotten in my van in years past. Do you have a picture of the foam?
_________________
Eric
82 Westfalia Camper (Currently getting a little bit fixed up)
85 944
72 GT6
88 F350
03 F150 |
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luVWagn
Samba Member
Joined: February 21, 2008
Posts: 1342
Location: Snoqualmie (WA)
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| Posted: Mon Mar 03, 2014 1:27 pm Post subject: |
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| madspaniard wrote: |
| Yeah, I would be very surprised if any of the two previous owners of my van added this foam. None of them ladies were involved too much in van upgrades based on what I know of them. The foam has clean cut lines like they were just made for this purpose. |
Would love a picture, perhaps even with the foam removed too? Maybe something cheap to sell to folks from one of the vendors 
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'91 Double Door Transporter |
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madspaniard
Samba Member
Joined: August 18, 2008
Posts: 3795
Location: Alameda, CA
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| Posted: Mon Mar 03, 2014 1:01 pm Post subject: |
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Yeah, I would be very surprised if any of the two previous owners of my van added this foam. None of them ladies were involved too much in van upgrades based on what I know of them. The foam has clean cut lines like they were just made for this purpose.
_________________
1991 Westy auto w/ Peloquin TBD
"The only difference between me and a madman is that I'm not mad” - Salvador Dali |
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Jake de Villiers
Samba Member
Joined: October 24, 2007
Posts: 5937
Location: Tsawwassen, BC
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| Posted: Mon Mar 03, 2014 11:22 am Post subject: |
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| madspaniard wrote: |
| Jake de Villiers wrote: |
| designer wrote: |
When you guys say you filled the A pillar with foam or whatever, did you actually "fill" the A Pillar; as in jam as much up there as far and thick as you could or did you essentially just cap it at the bottom to prevent airflow up and through?
Thanks!
-cc- |
You just need to plug it so that stops behaving like a big contrabass flute! |
I took a look at the bottom of my A pillars and it turns out both sides have a grey piece of rectangular foam that looks very stock blocking these openings. Maybe this is a factory upgrade in late Vanagons? Mine is a 1991. |
Interesting! It makes sense but we need some more data points to compare.
_________________
'84 Vanagon GL 1.9 WBX
'86 Westy Weekender Poptop/2.5 Subaru/5 Speed Posi/Audi Front Brakes/16 x 7.5 Mercedes Wheels - answers to 'Dixie'
@jakedevilliersmusic1
http://sites.google.com/site/subyjake/mydixiedarlin%27
www.crescentbeachguitar.com
www.thebassspa.com |
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madspaniard
Samba Member
Joined: August 18, 2008
Posts: 3795
Location: Alameda, CA
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| Posted: Sun Mar 02, 2014 11:55 pm Post subject: |
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| Jake de Villiers wrote: |
| designer wrote: |
When you guys say you filled the A pillar with foam or whatever, did you actually "fill" the A Pillar; as in jam as much up there as far and thick as you could or did you essentially just cap it at the bottom to prevent airflow up and through?
Thanks!
-cc- |
You just need to plug it so that stops behaving like a big contrabass flute! |
I took a look at the bottom of my A pillars and it turns out both sides have a grey piece of rectangular foam that looks very stock blocking these openings. Maybe this is a factory upgrade in late Vanagons? Mine is a 1991.
_________________
1991 Westy auto w/ Peloquin TBD
"The only difference between me and a madman is that I'm not mad” - Salvador Dali |
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madspaniard
Samba Member
Joined: August 18, 2008
Posts: 3795
Location: Alameda, CA
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| Posted: Tue Jan 21, 2014 10:51 pm Post subject: |
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Perfect! Thanks
_________________
1991 Westy auto w/ Peloquin TBD
"The only difference between me and a madman is that I'm not mad” - Salvador Dali |
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designer
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Joined: November 05, 2009
Posts: 523
Location: Idaho-but just the tip
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scottbott
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Joined: June 02, 2010
Posts: 83
Location: essex,uk
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| Posted: Sat Jan 18, 2014 1:42 pm Post subject: |
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| I tried this and noticed a big difference straight away especially on wet roads,well worth trying if you have not done it |
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