Dynamat 101

[cvette98pacecar]

Okay I have had the Dynamat for over a year and decided to finally install it.

First things first you have to strip the interior out of the car.
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Next you have to clean out all the debris. I used a Tornador with an Enzyme cleaner. I had a little buzz going for awhile.


Cover everything with Dynamat
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Okay so I only got the back done. Tomorrow the Dynapad goes in the back and hopefully the antenna cable will come so I can put the back of the car back together.

Installed:
Back up Camera, XM radio antenna, HD radio Antenna, Dynapad in the cargo area.

[Blue Flame Restorations]

Looks good, Robert:cheers:

[RHanselman]

Very nice indeed!

[VetteMed]

Nice pics. Sound deadening is a great addition to the C4. I used a different product but I'm sure the Dynamat will serve you well.

[cvette98pacecar]

Nice pics. Sound deadening is a great addition to the C4. I used a different product but I'm sure the Dynamat will serve you well.

Got the Dynapad done in the cargo area today. Will add more photos tomorrow.

[carter200]

Robert,
That is alot of work and you are doing a great job. You'll be rewarded with a quieter and cooler interior, for sure!

[Tony Davila]

Bob, man you have been busy since BG. I applaud you in your effort. I had to wear ear plugs on my way home. Ears couldn't take it anymore, so I think I will follow you on your endeavors and do the same. Chao

[cvette98pacecar]

Bob, man you have been busy since BG. I applaud you in your effort. I had to wear ear plugs on my way home. Ears couldn't take it anymore, so I think I will follow you on your endeavors and do the same. Chao

I have the original B&B which are extremely loud 140db inside the car at 70 MPH.
The QTP exhaust cutouts lowered the interior noise to 106db, which was extremely bearable.
I am hoping the dynapad, dynapad reduce the exterior noise to 80db.
When Dave J and I drove Yun black 94 the interior noise was 90db.

[cvette98pacecar]

Day 5, Damm is this one long drawn out process.

Got the Dynapad in and the dashboard out.
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Cleaned the interior cabin with the Tornador than took a little undercoating to add protection and started to install more Dynamat.

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There is one thing that I did forget to mention if you are going to try to do this on your car. The floor boards in C4 are very flimsy, you should support the underside of the floor pans.

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I did install new Armoflex to protect and quit all the wiring in both of the rear cargo chase's. I used the same screwdriver so you could see how much more room is in the New Armoflex.

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I got tired of the de-construction and installed the XM and HD antenna

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[WARP TEN]

Hi Robert--
I had Marc put Dynomat in my 93 HIL KING (now QB93Z) in the mid 90s and I thought it made the car seem quieter and more solid. We wired the car for sound and took decibel readings before and after but didn't see a big difference. Still, I think it was an improvement regardless of the readings. Good idea that I may do in my 95. It looks like you are doing a more complete coverage job than we did which also may explain the readings. Yours should show a big improvement I think. --Bob

[Kevin]

i've been considering this for my roof as the pad has deteriorated to the point the headliner is sagging.

[Jagdpanzer]

I have the original B&B which are extremely loud 140db inside the car at 70 MPH.
The QTP exhaust cutouts lowered the interior noise to 106db, which was extremely bearable.
I am hoping the dynapad, dynapad reduce the exterior noise to 80db.
When Dave J and I drove Yun black 94 the interior noise was 90db.

140 db is extremely loud
What kind of instrument did you use to take these readings?

[Pete]

What i see is extra weight.and loss of gas mileage and performance.

Now a Chevy Cruze will keep up with you maybe kick your butt:p

Adding more weight to an already heavy beast Rob you trying to break the record for heaviest Z,you shooting to hit 2 tons.

Pete

[mgg]

Pete , I have to agree but to each his own I guess. If you want quiet , buy a cadillac.

[Kevin]

Pete , I have to agree but to each his own I guess. If you want quiet , buy a c6.

fixed that for ya

[Pete]

Pete , I have to agree but to each his own I guess. If you want quiet , buy a cadillac.

BINGO!!!

[cvette98pacecar]

Pete , I have to agree but to each his own I guess. If you want quiet , buy a cadillac.

It isnt really about quiet, It is more about some sort of drive-ability, The Interior noise level was 140db. 90db at 8 hour causes hearing loss. I want to be able to drive my car and not lose my hearing at the same time.


Pete the added weight is 76 pounds (.07 seconds) If I lost 100# the added gain is .10 seconds, I would still be up .03 seconds. End result instead of running a 12.0 flat, It is a 12.2 car. Not even remotely fast by any means.

Device used was a SPL LAB PRO.

[cvette98pacecar]

What i see is extra weight.and loss of gas mileage and performance.

Now a Chevy Cruze will keep up with you maybe kick your butt:p

Adding more weight to an already heavy beast Rob you trying to break the record for heaviest Z,you shooting to hit 2 tons.

Pete

I will just have more engine work done that way I wont even have to go on a diet. On a serious note it was a very heavy Z to start with you have to add the 200# for the Callaway Aerobody.

[Tony Davila]

Pete the added weight is 76 pounds (.07 seconds) If I lost 100# the added gain is .10 seconds, I would still be up .03 seconds. End result instead of running a 12.0 flat, It is a 12.2 car. Not even remotely fast by any means.

Device used was a SPL LAB PRO.[/QUOTE]

Bob, I like your thought process about this. Also only race cars down hills and jack up the rear so that your Z is perpetually going down hill. It will be faster and offset the weight added. That is what I would do. LOL:-D
Just kidding of course......
You mentioned hearing loss.... you aren't kidding, I had to stop at Wally World to pick up some ear plugs driving home. I already have ringing in my ears from flying helicopters.

[BigJohn]

What???

[jimmac28]

Loudest recommended exposure WITH hearing protection 140dB Jet engine at 100' 140dB. Level at which sustained exposure may result in hearing loss 90 - 95dB

Robert maybe your meter is off a little. :cheers:

[cvette98pacecar]

Loudest recommended exposure WITH hearing protection 140dB Jet engine at 100' 140dB. Level at which sustained exposure may result in hearing loss 90 - 95dB

Robert maybe your meter is off a little. :cheers:


All of my meters are calibrated annually. I knew someone would doubt my number so I decided to get a DB reading while on a plane. As you can clearly see the DB meter on my phone is at 140DB, While this is a mere cheap app for my android Jim V. can verify that the reading is not that inaccurate as we tested this app next to his DB meter.

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[mike100]

My B&B's were crazy loud.

My Corsa's even got special treatment by the SDSD.

[jimmac28]

Well now you got me wondering, I'm going to test mine this weekend. :cheers:

[JThomas]

Robert:

Very nice job. It sometimes hurts to see a very good car dismantled like that, but I know you'll get it back together as good as new. Just wish I had time to take on a project like that. :cheers:

[secondchance]

When Dave J and I drove Yun black 94 the interior noise was 90db.

What!? When did you and Dave sneak my car out?... And take measurement! She feels violated... Nah, just kidding.:cheers:

[cvette98pacecar]

What!? When did you and Dave sneak my car out?... And take measurement! She feels violated... Nah, just kidding.:cheers:

Yun, Your car is the reason I am driving mine. That is the cleanest 100K+ mile car I have ever seen in my life.

Joe, I know that feeling. The only reason I took it apart was I was suppose to have a home office week so I felt I could get it back together in time for Bloomington. Tuesday night at 6PM I got a call that I needed to be on a plane Wednesday morning.

[cvette98pacecar]

Got home today at around 5 and went right to work.

Got all the dynamat complete have the dynapad to do around the tunnel Than I can start putting everything back together.

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[RHanselman]

I like!

FYI - I downloaded an IPhone app for my trip home (in the LT-1 car.) It indicated between 95-99 db's. So I had 18 hours of this all in one day. Luckily I had my noise canceling headphones with me!

[cvette98pacecar]

I like!

FYI - I downloaded an IPhone app for my trip home (in the LT-1 car.) It indicated between 95-99 db's. So I had 18 hours of this all in one day. Luckily I had my noise canceling headphones with me!

Now imagine the B&B triflow exhaust.