89 sound deadening
#1
Racer
Thread Starter
89 sound deadening
I used to do car audio back in the day. One thing I really don't miss is putting down the sound deadening material. I know it's all worth it in the end but I forgot what a horrible pain in the butt this really is. This is the progress so far, and reflectix is next!
#2
Burning Brakes
Member Since: Jan 2019
Location: Park City, TN
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Nice work. I did this recently to my Ranger pickup. Learned to wear gloves due to all of the small cuts on my fingertips.
Good work!
Good work!
#3
Racer
I'd like to do this to my 89 one day. Did you think to take a decibel reading before this work? I'd like to see this if you did -- before and after.
#4
Racer
Thread Starter
I did not. Most of these companies claim that you're going to hear about a 30% sound difference. I've seen some people on here claim that it's 60% less than what they heard before. It's a Corvette so it will never be as quiet as a Cadillac, and I don't expect it to be. I'm not putting in a big stereo, this was one of those things where when the carpet was out I figured I might as well do it. Any reduction in sound will be better than nothing and I was hoping that this would also help to reduce the heat a little bit. By the time I get to sound deadener in there followed by the reflectix, I'm sure it will be much quieter than what it was before and it will have a lot less heat.
#5
Racer
Thread Starter
Reflectix is done! Way cheaper than the precut kits they sell online. Now I just have to foil tape the seams.
#6
Racer
Looks really nice. What's the difference in the two materials?
How far up does it go on the firewall? I'm curious if you hear a reduction in front tire noise.
How far up does it go on the firewall? I'm curious if you hear a reduction in front tire noise.
#7
Racer
Thread Starter
Kilmat is to deden the sound. Reflectix is to insulate against heat radiating into the cabin. It only runs about halfway up the firewall as I did not remove the sub dash to remove the black mat insulation installed at the factory.
#8
Instructor
im going to be doing this soon. Since you have a history with the stuff, I see you went with kilmat, how much difference really is there between the different brands? Ive read several different things but Im guessing a lot is probably personal opinion or advertising. Also how many sq ft did you use, that will make it easier for me to buy mine. How much more do you think the reflectix will help on the heat, doesnt the kilmat reduce the heat already?
#9
Racer
Thread Starter
im going to be doing this soon. Since you have a history with the stuff, I see you went with kilmat, how much difference really is there between the different brands? Ive read several different things but Im guessing a lot is probably personal opinion or advertising. Also how many sq ft did you use, that will make it easier for me to buy mine. How much more do you think the reflectix will help on the heat, doesnt the kilmat reduce the heat already?
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Blackcorvette_85 (06-11-2019)
#11
Racer
Thread Starter
The way sound deadening works is by reducing vibration in a rigid panel, that is why it is placed on first. The heat barrier is not rigid so therfore the sound deadening would have zero effect.
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jrobin1 (07-17-2019)
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AudioObsessions (07-17-2019)
#14
Melting Slicks
Here is a question,A.O., with the excess kllmat can I apply another layer or will it not make a difference?
Thanks.
#15
Racer
Thread Starter
You can apply as many layers as you want, the more the merrier! Place any excess in areas where the most noise will radiate from(I. E. Doors, floor, transmission tunnel).
#16
Melting Slicks
btw, killmat is mfg by the Federation of Russia(might be the only thing I bought from Russia) and of course the flattening tools were made in China...batting 1000%
#17
Racer
Thread Starter
As far as the kill Matt being made by the Federation of Russia, almost everything we buy or use has some type of foreign content in it. Even products claim that they are 100% made in the USA have some foreign content in them. We unfortunately will never win that battle as much as we want to.
#18
Racer
Today I purchased Noico (because it is thicker) for the cabin. I plan to cover that with the Reflectix. I also purchased some Uxcell 394 mil thick waterproof deadening mat that I intend to use on top of the wheel well liners. I have a gap of a couple of inches between the top of the wheel well liner and the fender skin so I plan to extend the mat over the edge of the line to the fender to close the gap. I checked another vette and apparently all of them have this gap.
Do you think the rear of the cabin needs the Reflectix or should I put an additional mat of some kind over the Noico?
Does the Reflectix product (looks like you used the Radiant Barrier) have a self stick backing? If not, did you glue it down?
I bought the car a few weeks ago to fulfill a bucket list item to drive the Route 66 with a good pal of mine. On the way home from Indiana (where I purchased it) to Tennessee, I discovered a lot about the noise and ride of a corvette. ( the one I bought was the first one I had ever ridden in or driven.
Thanks again A.O. for your advice.
Do you think the rear of the cabin needs the Reflectix or should I put an additional mat of some kind over the Noico?
Does the Reflectix product (looks like you used the Radiant Barrier) have a self stick backing? If not, did you glue it down?
I bought the car a few weeks ago to fulfill a bucket list item to drive the Route 66 with a good pal of mine. On the way home from Indiana (where I purchased it) to Tennessee, I discovered a lot about the noise and ride of a corvette. ( the one I bought was the first one I had ever ridden in or driven.
Thanks again A.O. for your advice.
Last edited by jrobin1; 07-17-2019 at 08:30 PM. Reason: Added question
#19
Racer
Thread Starter
Today I purchased Noico (because it is thicker) for the cabin. I plan to cover that with the Reflectix. I also purchased some Uxcell 394 mil thick waterproof deadening mat that I intend to use on top of the wheel well liners. I have a gap of a couple of inches between the top of the wheel well liner and the fender skin so I plan to extend the mat over the edge of the line to the fender to close the gap. I checked another vette and apparently all of them have this gap.
Do you think the rear of the cabin needs the Reflectix or should I put an additional mat of some kind over the Noico?
Does the Reflectix product (looks like you used the Radiant Barrier) have a self stick backing? If not, did you glue it down?
I bought the car a few weeks ago to fulfill a bucket list item to drive the Route 66 with a good pal of mine. On the way home from Indiana (where I purchased it) to Tennessee, I discovered a lot about the noise and ride of a corvette. ( the one I bought was the first one I had ever ridden in or driven.
Thanks again A.O. for your advice.
Do you think the rear of the cabin needs the Reflectix or should I put an additional mat of some kind over the Noico?
Does the Reflectix product (looks like you used the Radiant Barrier) have a self stick backing? If not, did you glue it down?
I bought the car a few weeks ago to fulfill a bucket list item to drive the Route 66 with a good pal of mine. On the way home from Indiana (where I purchased it) to Tennessee, I discovered a lot about the noise and ride of a corvette. ( the one I bought was the first one I had ever ridden in or driven.
Thanks again A.O. for your advice.
#20
Racer
Hey AO if you are online today I have a couple of questions on the sound deadening. I am removing the rear carpeting, etc. Not sure I should have but I removed the rear speakers. There is an empty cavity behind them with no padding at all only Metal or Fiberglas. Also there is a hollow tube in the speaker assembly about one and a half inch diameter that just opens up inside that cavity behind the speaker assembly. Questions: 1. Should I add any sound deadening in the cavity behind the speaker assembly (or will that screw up the speaker sound)? 2. What is that open tube for and should I do anything with it? (assuming not since it came from factory like that) 3. Should I save the original carpet pad and reinstall it over the new deadening material?
Any advice you can give me will be greatly appreciated. Thanks.
I should have added that my car is a 93
Any advice you can give me will be greatly appreciated. Thanks.
I should have added that my car is a 93
Last edited by jrobin1; 07-20-2019 at 03:08 PM. Reason: add model year
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vette196 (07-21-2019)