Sound Deadening article published...
Thread Starter
Pro
Joined: Jun 2002
Posts: 580
Likes: 0
From: Boise ID
Sound Deadening article published...
We got an astounding 8 db difference with the L-comp and Brown Bread combined.
http://www.hometheaterhifi.com/volum...ng-6-2003.html
Hints for corvette guys:
1. Cover everything with brown bread.
2. Do two layers everywhere, except by drivers pedals.
3. Put L comp on floor and behind seats / tranny tunnel, back deck.
We got an astounding 8db difference. Much more than I could have expected. I still need to work some magic on the door panels, and they have a 400hz vibration that is driving my nuts...
Brian
Car Audio Editor
Secrets of HomeTheater
[Modified by brianw21, 3:52 PM 6/9/2003]
http://www.hometheaterhifi.com/volum...ng-6-2003.html
Hints for corvette guys:
1. Cover everything with brown bread.
2. Do two layers everywhere, except by drivers pedals.
3. Put L comp on floor and behind seats / tranny tunnel, back deck.
We got an astounding 8db difference. Much more than I could have expected. I still need to work some magic on the door panels, and they have a 400hz vibration that is driving my nuts...
Brian
Car Audio Editor
Secrets of HomeTheater
[Modified by brianw21, 3:52 PM 6/9/2003]
Burning Brakes
Joined: Feb 2000
Posts: 1,111
Likes: 0
From: Philly burbs PA
Re: Sound Deadening article published... (brianw21)
sounds great. Here is a trick for the doors.
I used rubberundrecoating from pepboys. It is the same spray stuff from dynamat. You can purchase it for $5 a can and I used two cans to do both doors. Stick with the can with they typical spray paint nozzle, the larger one leaked too much.
I took off the doors and tightened everything down. Then I removed the bose grill and glued the plastic cage piece down. It was a noise maker. Next, i sprayed two coats on the doors and let them dry over night. I think i added about two pounds of stuff to each door.
My doors are quiet as can be. There are no noises at all!!! Plus, you can not tell that the door is covered in undercoating. I let the panels dry for 24hours before reattaching them.
I used rubberundrecoating from pepboys. It is the same spray stuff from dynamat. You can purchase it for $5 a can and I used two cans to do both doors. Stick with the can with they typical spray paint nozzle, the larger one leaked too much.
I took off the doors and tightened everything down. Then I removed the bose grill and glued the plastic cage piece down. It was a noise maker. Next, i sprayed two coats on the doors and let them dry over night. I think i added about two pounds of stuff to each door.
My doors are quiet as can be. There are no noises at all!!! Plus, you can not tell that the door is covered in undercoating. I let the panels dry for 24hours before reattaching them.
Burning Brakes
Joined: Oct 2001
Posts: 1,205
Likes: 0
From: Dallas City IL
Re: Sound Deadening article published... (brianw21)
1st off, you stole the line from my Sig, Easy Bake Oven, I want royalties, :jester
I've been working with some stuff similar to L comp. We had a 6dB loss on a coupe with long tube headers and basically straight pipe exhaust. :crazy:
I've been working with some stuff similar to L comp. We had a 6dB loss on a coupe with long tube headers and basically straight pipe exhaust. :crazy:
Thread Starter
Pro
Joined: Jun 2002
Posts: 580
Likes: 0
From: Boise ID
Re: Sound Deadening article published... (M396 #00-011)
I love that term, and after putting in Brown Bread in a 103Deg garage, well it was fitting.
Most people never consider the L-Comp, but it is amazing stuff. I used 4 boxes.
1 box = Driver side floor
1 box = Passenger side floor
1 box = rear deck
1 box = behind seats
Most people never consider the L-Comp, but it is amazing stuff. I used 4 boxes.
1 box = Driver side floor
1 box = Passenger side floor
1 box = rear deck
1 box = behind seats
Safety Car
Joined: Aug 2000
Posts: 4,537
Likes: 84
From: St. Joseph MO
Cruise-In III Veteran
Cruise-In IV Veteran
Re: Sound Deadening article published... (M396 #00-011)
I've been working with some stuff similar to L comp. We had a 6dB loss on a coupe with long tube headers and basically straight pipe exhaust. :crazy:
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Thread Starter
Pro
Joined: Jun 2002
Posts: 580
Likes: 0
From: Boise ID
Re: Sound Deadening article published... (leolufse)
Well:
1 Roll Brown Bread: .4lb/ft^2 * 70 = 28lbs
4 Rolls L-Comp: 8lb /roll * 4 = 32lbs
1 JL 12W7 = 40lbs
JL 1000/1 = 15lbs
JL 450/4 = 15lbs
JL 300/2 = 7lbs
5 lbs of MDF
so....
142 LBS... but it was so worth it. The car is much less tiring on longer runs. That 8db difference is VERY noticeable. And the dampning was distributed evenly over the car so the 50/50 isn't messed with.
The amps and processor are before the front wheel, with the sub in the back. I haven't noticed any ballance changes.
The 12W7 hits hard enough that you can fell the wind around the tonnoue cover into the seating area... so better AC :)
1 Roll Brown Bread: .4lb/ft^2 * 70 = 28lbs
4 Rolls L-Comp: 8lb /roll * 4 = 32lbs
1 JL 12W7 = 40lbs
JL 1000/1 = 15lbs
JL 450/4 = 15lbs
JL 300/2 = 7lbs
5 lbs of MDF
so....
142 LBS... but it was so worth it. The car is much less tiring on longer runs. That 8db difference is VERY noticeable. And the dampning was distributed evenly over the car so the 50/50 isn't messed with.
The amps and processor are before the front wheel, with the sub in the back. I haven't noticed any ballance changes.
The 12W7 hits hard enough that you can fell the wind around the tonnoue cover into the seating area... so better AC :)
Thread Starter
Pro
Joined: Jun 2002
Posts: 580
Likes: 0
From: Boise ID
Re: Sound Deadening article published... (brianw21)
I also have a 95% box of Brown Bread. If you are thinking of doing your call make an offer.. as I don't need the remaining.
That is 95% of the big roll BTW... :)
That is 95% of the big roll BTW... :)
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Re: Sound Deadening article published... (brianw21)
We got an astounding 8db difference.
The most important thing to remember when using a Viscoelastic Deadener is its adhesion to the surface.
amen to that :cheers:
[Modified by Mike Mercury, 12:49 PM 6/12/2003]
Race Director
Joined: Apr 2000
Posts: 11,840
Likes: 0
From: Galloway NJ
Re: Sound Deadening article published... (brianw21)
I also have a 95% box of Brown Bread. If you are thinking of doing your call make an offer.. as I don't need the remaining.
That is 95% of the big roll BTW... :)
That is 95% of the big roll BTW... :)
