Dynamat installed - Drone reduced
Thread Starter
Pro
Joined: Feb 2005
Posts: 510
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From: Pennsylvania
Dynamat installed - Drone reduced (w/ pics)
I added a Dynamat Dynapad to my rear cargo area in hopes of reducing the 1500-2000 rpm drone with my GHL exhaust. In my opinion it significantly reduced the drone and practically eliminated it altogether in the 1800-2000 rpm range. While you don't get as much drone you still hear the throaty rumble of the pipes just like without the Dynapad. Dynamat has so many different products its confusing to figure which one would be best. The Dynapad is a 4 layer composite that is 3/8 inch thick and is designed to solve exhaust system heat and low frequency noise. The pad itself is 12 lbs. (1 lb. per square ft.). I used the Lloyds mat as a pattern and cut a piece to lay on top of the carpet but under the Lloyds mat. If you want to remove it you can just pull it out just like you would the Lloyds mat. I didn't want to take the interior apart (pull up the carpet) so the Dynapad made sense from the standpoint of easy install (lay on top of carpet), has a smooth foam bottom (won't hurt carpet), no smell, and marketed as product to reduce low frequency exhaust noise. Total cost $115. Total project time 30 minutes. Here are some pics
Side to Side
With Lloyds mat on top
Side to Side
With Lloyds mat on top
Last edited by BigJag; Apr 4, 2006 at 08:42 PM.
Burning Brakes
Joined: Dec 2004
Posts: 1,075
Likes: 3
From: Penn Valley California
Thanks for the post and pictures,BigJag!This may be enough to tip some us toward a new system who were hesitating because of the drone issue.And I agree that if this was precut and packaged with the C6 systems it would be all the better-an excellent concept! 
Pro
Joined: Dec 2004
Posts: 714
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From: Cottage Grove MN
Great! I am glad it worked for you...I have the materials for mine and will probably do it this weekend. While the drone never bothered me, it is certainly something I could live without. This makes the GHL's perfect!
Where did you get yours?
Where did you get yours?
Thread Starter
Pro
Joined: Feb 2005
Posts: 510
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From: Pennsylvania
Des / TommyV - I purchased it online from mmxpress.com. The Dynamat part number for the Dynapad is 21100 and it comes on a 32" x 54" inch roll. Dynamat sells it for $140 on their website, mmexpress.com had it for $100 plus $15 shipping. I will caution it took about 2.5 weeks from time of order until I actually got it.
Instructor
Joined: Aug 2005
Posts: 122
Likes: 0
From: Santa Clarita CA
I saw this at someones website I wonder how much this cost?
http://www.useddialers.com/c6audio.htm
http://bquiet.com/index.html
http://www.useddialers.com/c6audio.htm
http://bquiet.com/index.html
Last edited by bigsipper; Apr 5, 2006 at 01:14 PM.
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Pro
Joined: Jul 2004
Posts: 702
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From: Centennial CO
How 'bout trying a blind test - Have your Wife or a buddy randomly remove and reinstall the pad, without you knowing if it is installed or not. Test drive it 5 or 6 times and see if you can acurately guess weather of not the pad is there. It's not that I don't believe you, just think this would be an interesting experiment, and have had too many others insist that their GHL's have no drone what-so-ever. 
Thread Starter
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Joined: Feb 2005
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From: Pennsylvania
Originally Posted by SellingBMWforC6
How 'bout trying a blind test - Have your Wife or a buddy randomly remove and reinstall the pad, without you knowing if it is installed or not. Test drive it 5 or 6 times and see if you can acurately guess weather of not the pad is there. It's not that I don't believe you, just think this would be an interesting experiment, and have had too many others insist that their GHL's have no drone what-so-ever.
Last edited by BigJag; Apr 5, 2006 at 10:31 PM.
Burning Brakes
Joined: May 2005
Posts: 866
Likes: 0
From: Palm Beach Gardens Fl
Regarding the Dynamat Dynapad ..
It looks good but, what took 30 minutes to install? Doesn't it come already cut to fit and you just flop it down?
Big Jimm
So. Fla.
--------------------------------
"Any man who says he is an American, but something else also, isn't an American. And, we have room for but one language here, and that is the English language."
... Theodore Roosevelt
It looks good but, what took 30 minutes to install? Doesn't it come already cut to fit and you just flop it down?
Big Jimm
So. Fla.
--------------------------------
"Any man who says he is an American, but something else also, isn't an American. And, we have room for but one language here, and that is the English language."
... Theodore Roosevelt
Last edited by Big Jimm; Apr 5, 2006 at 08:50 PM.
Thread Starter
Pro
Joined: Feb 2005
Posts: 510
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From: Pennsylvania
Originally Posted by Big Jimm
Regarding the Dynamat Dynapad ..
It looks good, but what took 30 minutes to install? Doesn't it come already cut to fit and you just flop it down?
Big Jimm
So. Fla.
It looks good, but what took 30 minutes to install? Doesn't it come already cut to fit and you just flop it down?
Big Jimm
So. Fla.
Last edited by BigJag; Apr 5, 2006 at 09:01 PM.
Thread Starter
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Joined: Feb 2005
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From: Pennsylvania
Originally Posted by mannys
Adding a Lloyds mat to my vert quieted things down a bit. Next step is try the dynomat. I may try to velcro it to the back of the mat.
CF Lazy Member
Joined: Mar 2005
Posts: 103
Likes: 2
From: Cincinnati Ohio
I followed your lead and did the exact same mod - it did help a little with the drone from Borla Aggressives on my A4. My drone is in a narrow band from about 1500-1700 rpm, and I think the DynaPad flattend the volume curve all the way thru that range. The drone is far from gone, but better. Thanks for the idea.
Le Mans Master
Joined: Sep 2000
Posts: 5,635
Likes: 4
From: Orlando Floriduh
Originally Posted by BigJag
The description was total project time, not install time. And no it does not come pre-cut. If you re-read the post it is obvious the 30 minutes was for tracing a pattern and cutting the 3 pieces required for a wall to wall (if you will) fit of the cargo area. The point was it is a cheap and easy way to reduce the drone. And most Dynamat applications go under the carpet which is a much bigger pain in the a$$.
Racer
Joined: Sep 2004
Posts: 359
Likes: 16
From: Sachse TX
I ordered the Dynapad and I'm going see it helps for me.
I did notice one thing this morning...I cleaned the inside of my exhaust tips with Simple Green and a soft bristle wire brush (made them look new) and that seems to have narrowed the range of drone at only 1600 rpms vs. the entire 1600-1800 range.
I did notice one thing this morning...I cleaned the inside of my exhaust tips with Simple Green and a soft bristle wire brush (made them look new) and that seems to have narrowed the range of drone at only 1600 rpms vs. the entire 1600-1800 range.