Is the Firewall Worth Sound Deadening? Before and After Decibel Testing
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- čas přidán 31. 03. 2022
- Whats the best bang for buck place to install deadener?
Check out the video about sound deadening the doors here!
• Are Doors Worth Sound ...
Welcome to (does stuff garage) - we're continuing our series about sound deadening our LS swapped 1963 Buick Riviera! Me and the boys always used to argue about what is the best place to install sound dampener to get the most benefit and could never agree. I'm applying this butyl rubber based material from KILMAT (dynamat knockoff) to help quiet the firewall down for that luxury car/truck/van feel. It will also help get the most out of your car audio system by keeping the good sounds in and the road noise out. Trunk/wheel wells, floor/firewall and doors where always at the top of the list to deaden. So I decided to test what area gives us the most reduction in decibels (dB) at idle and while moving. I've used KILMAT extensively in the past and consider it the best Dynamat material/alternative - I recommend the 80 mil thickness so you only have to apply 2 layers to hit the minimum recommended thickness of 150 mils of insulation. Want more before and afters? Let me know what to sound deaden next!
Like the video??? Please click the link to subscribe and promise (maybe) not to let you down!
/ @matthewfinlay
Here's all the products used in the video
FCHO Car Sound Deadening Metal Roller Installation Tool Set
www.amazon.com...
KILMAT 80 mil 36 sqft Car Sound Deadening Mat
www.amazon.com...
Sketchy Decibel Meter
www.amazon.com...
Sound Deadener Decibel Testing - Is the firewall Worth Sound Deadening?
#KILMAT #sounddeadeningshowdown - Auta a dopravní prostředky
“It’s not going well, but it hasn’t failed yet. Just like me, Dad” 😂
Good experiment, however the problem I see with most people doing sound insulation is that only the "dynamat" type of material is used. Matter of fact, because the function of such sheets is to reduce vibration, there's no need to cover the whole panel with it. Just some portions of it will do just fine (covering around 50% of the panel works fine).
Over the mat, you should place a layer of closed foam material and over that a layer of vinyl cover, this is heavy, but adds the most insulation.
Couldn't agree more buddy and I think we could talk for hours! This car actually has a layer of closed cell foam to decouple the 1lb per sq mass loaded vinyl from the floor. The doors have Ensolite on them to help with vibrations/rattles between the panel and the butyl rubber material itself. The issue I've seen over the years - very few people want to deal with all that goes into getting tomb like silence (financially or the pain-in-the-butt factor). Heck we've argued Green Glue caulk vs. Noise Grabber Acoustic Tape when sealing MLV seams in our shop! I have had good luck installing more then one layer of butyl mats though - but I used to believe in the "sound deadener showdown" belief of only installing 25-50% of the panel. The issue I've seen time and time again is vehicles are too unpredictable on what will transmit the noise, what floor channel will have an echo, or what floor drain plug fell out a long time ago that nobodies noticed and the butyl covers up an underlying issue. It's just not beneficial IMO to rely on maximum hypothetical coverages. I will say, while it technically not the correct kind of material for the job... two layers insulates from heat quite well. We first noticed it on a roof that was substantially cooler inside afterward after being in the sun. Maybe I need to do some temp testing when I do the roof of this car just for fun!
What is vinyl cover? Could you please send a link?
@@MatthewFinlay Sorry for the late reply, for some reason I didn't get a notification on your reply. I totally agree with what you say, there's no answer that will apply to every car, so it's better to test and see what works. I did my 04 Subaru Legacy years ago, and I agree, doing the roof does decrease temperature on hot days, and it blocks rain noise while driving (I live in the south of Chile, and it rains a lot, like in Portland, OR.) I love hearing the rain only on the windshield on long drives.
It took me about 5 days to a week, doing it after work to strip the car, insulate it, and put it back together, but it was really worth it in my opinion.
This is what i was looking for. Decibel before and after 👍
Dude you're hilarious, thanks for another informational and entertaining video
Thanks buddy! Glad you’re here and enjoyed the video!
Have you thought about a layer of cork? It comes in sheets and tiles. 3/8" can reduce by up to 10db. I redid the floor of my motorhome using a layer of kilmat then cork underlay, then vinyl floor on top. What a difference! I don't have any measurements, but even my child noticed the difference.
This is something I’ve literally never thought of it! Just doing some quick research I was shocked how people prefer it over foam which was what I guess would be it’s equivalent… looks like we are gonna have to test it down the road (no pun intended)! Thanks for the idea buddy
Actually you did the best as all three resolve different things as each has it's own properties as you already have discovered and read about. Vinyl provides a dirt and scuff protection, besides it own element in noise/sound reduction. Cork provides another element as well. While Kilmat provides one different from cork, but is complimentary. It's something that I will have to consider as I have the old rubber liner/underlay which carpeting is attached to for the back of my 1987 Jeep Cherokee which I just bedlined as the old underlay retained moisture and caused some rust. Yet I wire wheeled, wiped down and then installed Kilmat as my first decoupler. I've yet to reinstall it after removing the old underlay. Thank you for bringing this material to my knowledge base.
Sound deadning my Camry roof made a big difference
Good stuff, hood liner and roof liner. Larger flat areas should help with lowering noise
It’s all on my to-do list! I’m debating about breaking the trunk sound deadener into two videos cause I’m working on that right now. Trunk inside and then a separate video of trunk panel liner - it’s gonna get complicated because I also wanna see if it RAISES the volume of the subwoofer in the car. What do you think?
@@MatthewFinlay It might be a difference on video but to your ear it’s probably going to sound the same. It’s kind of like hifi audio. They say it’s CD quality, but unless you have a CD to compare, it’s hard to know if it’s the same or it’s just your mind saying it is.
this type of insulation is mainly used for low frequency, there are typically different layers aimed at different frequencies, therefore just putting this type of deadener will have results only at low frequency.
Agreed but it’s an easy start for someone to get into sound deadening with a relatively low cost/ease of installation. It’s only one part of the system but it’s hard to measure the frequencies that are effectively dampened in the car without using a mic and even then it’s very car to car.
Sound proof the wheel wells?
I’m actually working on that and the trunk right now! I decided to combine them together because on my particular car the rear wheel wells are quite small.
Try sound deadening the hood, that car has alot of vibrating metal covering the hood
That’s on my to-do list! Trunk is be sound deadened for the video
Interesting the difference between idle and cruising noise.
Right? I always knew and believed it when people recommended going "all in" when it comes to the rear quarter panels. Which makes sense - tires make noise, rear ends make noise, etc. But I always assumed some HAD to be from the front wheels too. I might lay mass loaded vinyl sheets over the inner fenders as a test just to see what happens.
Worth the extra work and cost, but my issue is weight.
Newer small cars are so light. I can really tell a different when I have weight in the car vs driving it alone.
I get it buddy, I don’t even notice when my wife’s with me in the Buick but if we drive her CR-V it’s obvious! It’s hard to do lightweight sound deadening builds. We would have to rely on foams which have there own thickness concerns and weren’t as effective. I HATE using jute in cars because of the moisture holding it likes to do but it’s hard to beat for its cost vs weight vs absorbing characteristics
Sound deadening will never weigh more than the box. If the box with all the sheets is 20 lbs, you're only adding 20 lbs of total weight to your car. (Amazon description for 36 sq ft of 80 mil KILMAT is 17.6 lbs).
Bulk head and dash panel outer n inner sound be sound damping than c the difference.
Is it safe will it catch on fire easily or melt?
You’ve got to get it super hot before it’ll melt - it’s not even phased hanging upside down in the engine bay in the summer idling. Flammability isn’t bad but since there are some oils in there it does burn… just like the gasoline in the car haha
Wanna see a little extra info and more pictures? Check out our DIY at - www.garbagecharged.com/firewall-sound-deadening.html
Bigger results ? Tf are you on ,~1.5dB is a big improvement, +3dB is about double the acoustic pressure so 1.5 is far from ridiculous
Just like my life, a big spiral downwards. lol
Truer words have never been said haha
Soooo… big waste of time and money. Check.
Story of my life buddy haha