Firewall sound pad alternative, Options? |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Firewall sound pad alternative, Options? |
lmcchesney |
Jul 15 2006, 07:48 AM
Post
#1
|
Member Group: Members Posts: 488 Joined: 24-November 03 From: Ocala, Fl. Member No.: 1,381 Region Association: None |
My 914 does not have a sound/head pad on the engine side of the firewall. I placed a dyno something, a foli/foam core sandwich mat, that sticks to the cabin side of the firewall. What are alternatives to the original mat. The purpose is for 1) cabin heat reduction 2) cabin noise reduction.
The engine is already in the car. Thanks, Larry |
Cap'n Krusty |
Jul 15 2006, 08:47 AM
Post
#2
|
Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
There's a Dynamat product made for use as a hood pad. Comes in a roll. I just used it on an MB 380SL and it worked well. As it's all one piece, it will be awkward to install on your car with the engine installed. The Cap'n
|
lmcchesney |
Jul 15 2006, 10:27 AM
Post
#3
|
Member Group: Members Posts: 488 Joined: 24-November 03 From: Ocala, Fl. Member No.: 1,381 Region Association: None |
Thanks Cqp'n.
The dynamat is what I have on the cabin side of the firewall. Any other suggestions? Larry |
Trevorg7 |
Jul 15 2006, 10:53 AM
Post
#4
|
Senior Member Group: Members Posts: 1,242 Joined: 7-December 04 From: Highland Village, TX Member No.: 3,241 Region Association: Southwest Region |
I realize you have thought about the Dynmat but here is Dynamat installed on my firewall....
Dynamat on firewall (scroll down a bit) T |
bondo |
Jul 15 2006, 10:58 AM
Post
#5
|
Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
The early cars didn't have any engine side sound pad. That's why early cars often have less firewall rust. (IMG:style_emoticons/default/smile.gif)
I would reccomend insulating the inside until it's quiet/cool enough for you, and leave the engine side free of any water trapping device. Make sure your rear window seal is good first though! |
lmcchesney |
Jul 15 2006, 12:29 PM
Post
#6
|
Member Group: Members Posts: 488 Joined: 24-November 03 From: Ocala, Fl. Member No.: 1,381 Region Association: None |
Thanks Trevor. That is the same barrier I have on the inside. I know it is a subjective question, but do you find it shelters the cabin from heat and sound?
Thanks Royce. That is a very good point. Thus, I was wondering if anyone has used a light weight protective coating, maybe something with rust inhibition. My firewall is presently free of rust, and it would be nice to keep it that way. Royce, is that an aftermarket shifter for the 901 sideshifter? Larry |
Joe Ricard |
Jul 15 2006, 12:39 PM
Post
#7
|
CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
Race quiet ear plugs... They are like foamy ear plugs but the center in hollow and the ear phone from Ipod or CD player makes like tolerable for 3+ hours going to an event.
|
bondo |
Jul 15 2006, 01:25 PM
Post
#8
|
Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
Thanks Trevor. That is the same barrier I have on the inside. I know it is a subjective question, but do you find it shelters the cabin from heat and sound? Thanks Royce. That is a very good point. Thus, I was wondering if anyone has used a light weight protective coating, maybe something with rust inhibition. My firewall is presently free of rust, and it would be nice to keep it that way. Royce, is that an aftermarket shifter for the 901 sideshifter? Larry I'm going to try a product called "quietcar" on mine, but it'll be a while before I know how well it works. It's spray on, and supposedly works better than dynamat. It's waterbased though, so it requires paint underneath, The shifter is a custom cableshifter for a sideshift 901 that I designed but have not yet tested. After testing I may start making and selling them, but that will be quite some time from now. (the 914 it's going into is almost ready to go onto the rotisserie that I haven't built yet) |
lmcchesney |
Jul 15 2006, 01:53 PM
Post
#9
|
Member Group: Members Posts: 488 Joined: 24-November 03 From: Ocala, Fl. Member No.: 1,381 Region Association: None |
Royce, if it is waterbased, will it not retain water and promote oxidation/rust?
|
bondo |
Jul 15 2006, 02:02 PM
Post
#10
|
Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
It's a water based latex viscowhatever foam. It somehow "cures" as it dries, much like latex paint. Ever try to get water to do anything to latex paint once it's dried? It changes somehow into something that isn't water soluble at all. I haven't been able to find anything bad said about it, besides the price. (IMG:style_emoticons/default/smile.gif)
|
Trevorg7 |
Jul 15 2006, 02:18 PM
Post
#11
|
Senior Member Group: Members Posts: 1,242 Joined: 7-December 04 From: Highland Village, TX Member No.: 3,241 Region Association: Southwest Region |
QUOTE Thanks Trevor. That is the same barrier I have on the inside. I know it is a subjective question, but do you find it shelters the cabin from heat and sound? Your right it is subjective and heat reduction was my intent. It does help, again no science rather seat of the pants analysis, and it may be a bit more quiet. How is it for you on the inside? I have some Dynamat left over and I was going to put it on the inside. Let me know. T |
Brando |
Jul 15 2006, 02:32 PM
Post
#12
|
BUY MY SPARE KIDNEY!!! Group: Members Posts: 3,935 Joined: 29-August 04 From: Santa Ana, CA Member No.: 2,648 Region Association: Southern California |
On my inside firewall I used that mutlipurpose industrial insulation... foil on one side, carpet padding on the other. It seems to help quite a bit, but I used 2 layers. I probably should have put down a layer of Dynamat Fatmat (ebay) first, then the insulation. I think when I eventually do my engine pull, I'll rhino liner the firewall.
Oh yeah, factory sixes don't have firewall padding on the engine-bay side. |
Mike McGrath |
Jul 15 2006, 03:53 PM
Post
#13
|
Member Group: Members Posts: 98 Joined: 5-December 04 From: Portland, Oregon Member No.: 3,225 |
I used Quietcar on my floorboards and in other cars. Good stuff as an alternative to dynamat / fat mat. I'd suggest using POR or rust preventive paint and then applying the Quietcar. If you're gonna spray, you probably need six to eight coats. Try brushing it on, as it goes on thicker and you don't have to waste a whole weekend watching the stuff dry.
Mike (in Portland) |
JPB |
Jul 15 2006, 03:54 PM
Post
#14
|
The Crimson Rocket smiles in your general direction. Group: Members Posts: 2,927 Joined: 12-November 05 From: Tapmahamock, Va. Member No.: 5,107 |
If you really need a mat inside that compartment then you need to go marine Bro. I have a marine cowl neoprene/mylar role which not only deadens the sound but also keeps things cool. It costs about 70-90$ and comes in roles 32X54. Product # 39104 at West Marine stores.
(IMG:style_emoticons/default/beer.gif) Gluck. |
lmcchesney |
Jul 15 2006, 08:37 PM
Post
#15
|
Member Group: Members Posts: 488 Joined: 24-November 03 From: Ocala, Fl. Member No.: 1,381 Region Association: None |
Thanks JPB .
I went to "Westmarine.com" and plugged in prod # 39104 and came up with a passive woofer tube. Plugged in marine cowl and got wind scoops. Do you have another identifier? Larry |
Air_Cooled_Nut |
Jul 16 2006, 12:35 AM
Post
#16
|
914 Ronin - 914 owner who lost his 914club.com Group: Members Posts: 1,748 Joined: 19-April 03 From: Beaverton, Oregon Member No.: 584 Region Association: None |
Remember, the best way to reduce noise is to use an agent that is bonded to the surface. Thus something like DynaMat (for EXAMPLE) which uses an adhesive to stick to the surface it's applied to is better than a material that you simple stick to the surface using tacks or a smear of contact cement.
|
highways |
Jul 16 2006, 12:46 AM
Post
#17
|
Senior Member Group: Members Posts: 613 Joined: 18-June 05 From: Los Angeles, CA Member No.: 4,296 |
Westmarine is sooooo over priced- their target audience is the cheese and wine yachtsman highbrow crowd you know.. there's gotta be somewhere cheaper.
|
lmcchesney |
Jul 16 2006, 07:53 AM
Post
#18
|
Member Group: Members Posts: 488 Joined: 24-November 03 From: Ocala, Fl. Member No.: 1,381 Region Association: None |
Anyone have experience with several layers of dynamat? Adjust to the noise and heat reduction desired (the subjective thing).
Larry |
Lo-Fi Version | Time is now: 16th May 2024 - 08:45 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |