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Re: Floor pan sound deadener. [Re: gtx6970] #2713192
11/05/19 10:06 PM
11/05/19 10:06 PM
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Freeport IL USA
poorboy Offline
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I cover the complete inside of my projects with the Noico. If its rolled down tight, I can't see water getting under it unless it sits under water for some time. You trim to fit with a utility knife, peal off the backing paper, stick into place and roll it flat. There is a noticeable difference in both the inside temp, and the inside sound level. Gene

Re: Floor pan sound deadener. [Re: poorboy] #2713208
11/05/19 11:25 PM
11/05/19 11:25 PM
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Wisconsin
wkroncke17 Offline OP
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Originally Posted by poorboy
I cover the complete inside of my projects with the Noico. If its rolled down tight, I can't see water getting under it unless it sits under water for some time. You trim to fit with a utility knife, peal off the backing paper, stick into place and roll it flat. There is a noticeable difference in both the inside temp, and the inside sound level. Gene


Ironic Gene, just before I read your post about the Noico, I did a search on eBay and it came up.
Looks like a good quality product and very reasonable.
Great conversation on all of this, I appreciate it very much guys.

Wally.

Re: Floor pan sound deadener. [Re: wkroncke17] #2713255
11/06/19 09:49 AM
11/06/19 09:49 AM
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Iowa
burdar Offline
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I'm planning on putting some on the inside of the doors on my Dart so they sound more solid. I wonder how effective it would be on the floor though since my car is a convertible. I'm still going to have a lot of noise coming into the car from the convertible top.

When you install this material over the entire floor and firewall, are you still attaching the factory firewall insulation with the plastic pins? Or, are you just installing the plastic pins through the firewall without the insulation...just to retain the correct engine compartment look?

Re: Floor pan sound deadener. [Re: burdar] #2713281
11/06/19 10:50 AM
11/06/19 10:50 AM
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Originally Posted by burdar
I wonder how effective it would be on the floor though since my car is a convertible. I'm still going to have a lot of noise coming into the car from the convertible top.


No, not really. Taking the case of being on the open road, no nearby buildings/bridges/etc, no, the only "noise" you will have come from above will be the lower frequencies, I say arbitrarily starting at 400hz? However, you would get those anyway with or without any roof/top, thru the windows/openings. Higher frequencies do not turn as well as the frequencies increase and they will simply go skyward after reflecting off the pavement. I could also make the case, it might actually be quieter (engine/exhaust) without a hard roof, in that a hard roof, will tend to reflect something back down into the interior any of noise reaching the underside of the roof. I am disregarding wind generated noise in the above discussion..

Any treatment of the underside of the roof is mainly to further deal with noise that has entered the car thru the floor and reflected back down, and to thermal insulate the roof.

edit If the roof is vibrating on its own due to say road vibrations, like a drum head, that is then its own source and should resolved on its own.

Last edited by jcc; 11/06/19 10:56 AM.

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
Re: Floor pan sound deadener. [Re: jcc] #2713324
11/06/19 12:33 PM
11/06/19 12:33 PM
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Cruising!
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QuickDodge Offline
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Back on page 1, JCC mentioned using SS exhaust pipe. I'm assuming he meant stainless steel exhaust pipe. Can someone explain why that is quieter?


I suspect most any form of insulation will reduce noise and heat in a car. A few decades back, I knew a guy who built an early 1970's Dodge custom van. He used fiberglass insulation that is typically used in building homes in the walls of the van. On the floor he had carpet with some kind of thick padding under it. He used some kind of performance mufflers that were fairly quiet, but the van definitely had a little rumble to it. (He had modified the 360.) I do not know all the details, but that van was surprisingly quiet inside and it would RUN!!

Re: Floor pan sound deadener. [Re: QuickDodge] #2713462
11/06/19 06:50 PM
11/06/19 06:50 PM
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Central Florida
larrymopar360 Offline
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Maybe I'll lay down a piece somewhere and pour some water and wait, and peel back up (if I can) and see if it's damp underneath? Having moisture trapped underneath if water finds it's way into an old car scares me.


Facts are stubborn things.
Re: Floor pan sound deadener. [Re: larrymopar360] #2713485
11/06/19 07:48 PM
11/06/19 07:48 PM
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Wisconsin
wkroncke17 Offline OP
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Originally Posted by larrymopar360
Maybe I'll lay down a piece somewhere and pour some water and wait, and peel back up (if I can) and see if it's damp underneath? Having moisture trapped underneath if water finds it's way into an old car scares me.


Very good idea.
How about on doors?
Should it go on the backside of the panel or do you try to squeeze it between the bracing directly to the inside of the door skin before the window and door mechanism is in?

Re: Floor pan sound deadener. [Re: QuickDodge] #2713524
11/06/19 09:32 PM
11/06/19 09:32 PM
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Originally Posted by QuickDodge
Back on page 1, JCC mentioned using SS exhaust pipe. I'm assuming he meant stainless steel exhaust pipe. Can someone explain why that is quieter?


I suspect most any form of insulation will reduce noise and heat in a car. A few decades back, I knew a guy who built an early 1970's Dodge custom van. He used fiberglass insulation that is typically used in building homes in the walls of the van. On the floor he had carpet with some kind of thick padding under it. He used some kind of performance mufflers that were fairly quiet, but the van definitely had a little rumble to it. (He had modified the 360.) I do not know all the details, but that van was surprisingly quiet inside and it would RUN!!


The SS is only quieter IF it is wrapped, regular steel tubing cannot handle the heat well over long periods when wrapped. I don't believe it quoets it much anyway, but it will reduce the heat transfer issue.


Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
Re: Floor pan sound deadener. [Re: jcc] #2713596
11/07/19 09:43 AM
11/07/19 09:43 AM
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Iowa
burdar Offline
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Quote
I am disregarding wind generated noise in the above discussion..


It is wind noise that I'm talking about. Driving a hardtop with the windows down, the wind drowns out most other noise. Granted, it won't be THAT bad with the windows up and a convertible top but I'd say most of the noise will be from wind. Maybe not. I've never had a convertible before. I just remember driving a Wrangler on my honeymoon and the wind noise was bad. I'll probably put some on the floor but maybe it's not required to cover everything on a convert. I'd like to hear from someone with a convertible who could give a before/after comparison.

Re: Floor pan sound deadener. [Re: larrymopar360] #2713659
11/07/19 12:33 PM
11/07/19 12:33 PM
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Bend,OR USA
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You could pull one of the plastic, rubber, floor plugs also to check for dampness also scope


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Floor pan sound deadener. [Re: burdar] #2713676
11/07/19 01:23 PM
11/07/19 01:23 PM
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Originally Posted by burdar
Quote
I am disregarding wind generated noise in the above discussion..


It is wind noise that I'm talking about. Driving a hardtop with the windows down, the wind drowns out most other noise. Granted, it won't be THAT bad with the windows up and a convertible top but I'd say most of the noise will be from wind. Maybe not. I've never had a convertible before. I just remember driving a Wrangler on my honeymoon and the wind noise was bad. I'll probably put some on the floor but maybe it's not required to cover everything on a convert. I'd like to hear from someone with a convertible who could give a before/after comparison.


A Comparison of exactly what? How insulating the floor of a car in a Convertible will reduce wind noise?

Wind noise is still an art outside of the OEM's, and our possible solutions are hit or miss, with so many factors involved its almost beyond practical discussion.


Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
Re: Floor pan sound deadener. [Re: jcc] #2713684
11/07/19 01:34 PM
11/07/19 01:34 PM
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Iowa
burdar Offline
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Quote
A Comparison of exactly what? How insulating the floor of a car in a Convertible will reduce wind noise?


A comparison if insulating the floor of a convertible has any noticeable decrease in cabin noise. It's proven to be effective on a hard top. But if wind noise is THE major/overwhelming source of noise in a convertible, a completely covered floor might not do much. You might decrease the noise coming up from the road, but you can't hear that anyway because the wind noise is the major source

Re: Floor pan sound deadener. [Re: burdar] #2713816
11/07/19 08:05 PM
11/07/19 08:05 PM
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Originally Posted by burdar
Quote
A Comparison of exactly what? How insulating the floor of a car in a Convertible will reduce wind noise?


A comparison if insulating the floor of a convertible has any noticeable decrease in cabin noise. It's proven to be effective on a hard top. But if wind noise is THE major/overwhelming source of noise in a convertible, a completely covered floor might not do much. You might decrease the noise coming up from the road, but you can't hear that anyway because the wind noise is the major source


I think you stated the obvious, which I was just hesitant to do.


Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
Re: Floor pan sound deadener. [Re: jcc] #2713841
11/07/19 09:31 PM
11/07/19 09:31 PM
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Wisconsin
wkroncke17 Offline OP
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All good discussion guys, very much appreciated.
Still wondering about the doors.
Should it go on the backside of the panel or do you try to squeeze it between the bracing directly to the inside of the door skin before the window and door mechanism is in?

Thanks everyone!

Re: Floor pan sound deadener. [Re: wkroncke17] #2713859
11/07/19 11:25 PM
11/07/19 11:25 PM
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1970 Superbird 440-6bbl, auto
1969 Barracuda 340-4bbl, FB Formula S auto
1969 Barracuda 6.1 L Hemi, 5 speed, Convertible
2022 Can Am Spyder RTL
Re: Floor pan sound deadener. [Re: RealWing] #2713958
11/08/19 12:40 PM
11/08/19 12:40 PM
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N.Y.
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Has anyone ever tried the Greatstuff insulation in spray can (windows and doors) that doesn't expand? in lower part of doors or around wheel wells. or hard to get too areas?
always wondered about the moisture.


Hell Hath No Fury Like Mine
Re: Floor pan sound deadener. [Re: wkroncke17] #2713980
11/08/19 01:51 PM
11/08/19 01:51 PM
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Do a search on this forum and also search Google for how to insulate small aircraft. Those techniques are very informative and effective.

Adhesive butyl products like Dynamat Extreme and Fat mat are good at stopping panel resignation, which is good. The real secret to keeping noise and heat out of the cabin is to use a double foil sided padding to cocoon the entire interior. Be sure to seal all the seams with that foil ducting tape with the wax paper.


1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
Re: Floor pan sound deadener. [Re: jbc426] #2714091
11/08/19 09:48 PM
11/08/19 09:48 PM
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Originally Posted by jbc426
Do a search on this forum and also search Google for how to insulate small aircraft. Those techniques are very informative and effective.

Adhesive butyl products like Dynamat Extreme and Fat mat are good at stopping panel resignation, which is good. The real secret to keeping noise and heat out of the cabin is to use a double foil sided padding to cocoon the entire interior. Be sure to seal all the seams with that foil ducting tape with the wax paper.


Foil is mostly marketing sizzle in these applications. To be effective it requires an air space/gap, and the reflective foil must face the offending heat source.

http://www.radiantbarrier.com/resources-articles-how-radiant-barrier-works-heat-gain-loss/

Last edited by jcc; 12/01/19 07:01 PM.

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
Re: Floor pan sound deadener. [Re: jcc] #2714093
11/08/19 09:59 PM
11/08/19 09:59 PM
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nowhere
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I guess if it's double foil sided then the foil will be facing the heat on way or the other.

Re: Floor pan sound deadener. [Re: Sniper] #2714170
11/09/19 10:06 AM
11/09/19 10:06 AM
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Originally Posted by Sniper
I guess if it's double foil sided then the foil will be facing the heat on way or the other.


Without the air gap, it doesn't matter which way the foil faces, as it reflects next to nothing.


Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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