anyone used expanding foam in there cab ???

[iluvmy72]

Originally Posted by coops714x4

I dont give the finger I just rev the 468 and watch there windows shatter

LOL...love this comment....do you have glass-packs???

[coops714x4]

Originally Posted by iluvmy72

LOL...love this comment....do you have glass-packs???

NOPE 2.5" straights turned out right in front of rear wheels yes its LOUD

[jim-bob]

...Coop..how much space (air gap) between the two panels?

[coops714x4]

Originally Posted by jim-bob

...Coop..how much space (air gap) between the two panels?

In the center of the cab not much maybe .25" but around the outside and in the back of the cab and B pillars there is alot of open area
we are working on getting the cab ready right now we got some rain here last week and we are making sure the inside is DRY order the product I mentioned and we will be filling the cab pretty soon

[ls1nova71]

Originally Posted by coops714x4

so were going to try it our plan is to turn the cab upside down and pour it in through the A and B pillars we are going to use a "snake cam" that is used by plummers to look in sewer lines to look in the cab and insure coverage once we have the roof coated we will spray it in the A and B pillars, interior light hole and cab light holes

You do know that there's a cardboard like material between the inner and outer roof panels, right? Not sure how you're going to get it completely coated inside.

[coops714x4]

yes I do know about the matte board but the coating should cover it too

[hotroddr]

I too have been wanting to do this for a while. Have you looked into the structural foams at all? I have been thinking about filling the A/B pillars and possibly other areas to make sort of a built in roll cage out of the existing structure of some of my vehicles. I am a ways off from actually pulling the trigger and doing any of this on any of my projects, but you might be interested in looking into it.

They are using foam to fill new cars both to quiet the interiors, and to make the passenger compartment more rigid, There are different types of foam for each application.

[Chevyman680063]

What about Rhino Lining?

[jim-bob]

Originally Posted by ls1nova71

You do know that there's a cardboard like material between the inner and outer roof panels, right? Not sure how you're going to get it completely coated inside.

......uh-oh...

[special-K]

Originally Posted by coops714x4

As we all know our trucks were not built like modern trucks and they are noisy on the inside

I just love these trucks for what they are. That's exactly what I like...They are not built like modern trucks.

[Hottrucks]

I'm in to see the results...

how about a zinc oxide for prep??

do yo have a DB meter?? it would be cool to run a DA on the roof and get a # before and after??

[jim-bob]

..I'm definately wanting to see Coop's reply..I have a severe hearing loss and believe this will help (we're working on the cab now so this is the time to do something)

[mbgmike]

We sell the AL's liner Heat and Noise reducer HNR

Al’s Heat and Noise Reducer (HNR) is a proprietary blend of latex synthetic polymers. It contains acrylic, PVA and vinyl styrene reinforced with ceramic microspheres that provide incredible insulation, heat reflection and sound deadening properties. HNR can withstand up to 500°F and reflects exterior temperatures by 45°F or more and reflects up to 36 percent of solar energy. It provides a heat shield for floor pans, firewalls, roofs and much more. Visit www.alsliner.com.

[ChevLoRay]

Here's a link about a comparo on sound deadening. Check it out. Oh, it's a lot of reading material, but it explains a lot.

http://www.sounddeadenershowdown.com/cgi-bin/index.cgi

Thanks to Mike, in Rhode Island for the link.

[1970 Bowtie]

Subscribed,cant wait to see the results.

[mbgmike]

Originally Posted by hotroddr

I too have been wanting to do this for a while. Have you looked into the structural foams at all? I have been thinking about filling the A/B pillars and possibly other areas to make sort of a built in roll cage out of the existing structure of some of my vehicles. I am a ways off from actually pulling the trigger and doing any of this on any of my projects, but you might be interested in looking into it.

They are using foam to fill new cars both to quiet the interiors, and to make the passenger compartment more rigid, There are different types of foam for each application.

Yes Gm uses diff formulas for different sections. The pillars get Betafoam GM9982296. It has a water absorbtion of .079 % or close. Thats measured on a 3" x 3" section heated in an oven and dried. Then totally submerged in De-ionized water for 24 hrs. and longer and weighed. so you can see it has very little absorbtion.

[jim-bob]

....what ever happend to member:"coops714x4" project where he was going to turn an old cab upside down and pour in so non-expanding closed cell foam back in May??

[Shaky]

Here's what it looks like inside there in case you're going to have a go at this. You've got that lip in the back to contend with.

[jim-bob]

..that's interesting..so you cut the top layer off just to coat it or were there other reasons to cut it? do you have other pics? thanks!

[67_C-30]

I find it really ironic that someone running a 468 with straight pipes coming out in front of the rear wheels is that concerned about sound deadening.

I think I know where a lot of that noise is coming from!

I would think that it would be a lot of work for a minimal amount of difference. New trucks are much quieter, but all new trucks also have full headliners and pillar covers with WAY more insulation that you could get in a truck with a bare metal inside cab. I'd think there's no way you ever get one of these trucks as quiet as a new one.

[Shaky]

Originally Posted by jim-bob

..that's interesting..so you cut the top layer off just to coat it or were there other reasons to cut it? do you have other pics? thanks!

I'm crazy - but not that crazy! There was a large dent in the top of the cab and we decided it was easier to swap skins than it was to pull the dent. Click the C20 resto thread below to see more.

[LostMy65]

Originally Posted by coops714x4

OK guys let me clear this up I am NOT using the spray foam that you get had the lumber yard or hardware store Im going to use a commercial CLOSED CELL, NON EXPANDING foam that is made for automotive use (READ MY LAST POST) right now I am researching products made by 3M, DOW,and DUPONT once I find the RIGHT product (THE ONE THAT I FEEL MOST COMFORTABLE WITH) I am going to experiment on a old cab first
One thing that concerns me right now is PREP these products seem to suggest that for these to work right prep is important and there is NO way to prep inside the roof panels. does anyone know what, if anything GM did to the metal that wasnt exposed did they use any kind of coating or inhibitor on them ?

And that's the problem with these trucks.
It doesn't matter how high a quality foam we get, we won't be able to get it to stick without getting in between to prep the surfaces properly.
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[LostMy65]

Just a thread bump.....

Note to All;

Do Not Use that Foam Insulation.

Someone put it in the cab back corners.

When I pulled the stuff out, the foam was dry, the metal was wet. It holds moisture.
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