Pros and Cons of Hood Sound Deadening Material

Loki

The Future is Unwritten
Mar 30, 2005
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Charlie97L said:
that's actually not sound deadening, it's a fire prevention device. it's pretty standard on turboharged cars, my mazdaspeed protege and wrx both had it. basically if something catches on fire it melts the clips, the padding falls down, and melts over/smothers the fire (ideally). it's not a perfect system, but i do know several people who's cars were saved by this thing. pretty cool.


I never knew that before, I took mine out because my blow off sits to high so I was trying to get the clearance for it but since I am now chaning my blow off I may have to look into putting it back in.
 

Idealsupra

Supramania Contributor
Mar 31, 2005
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Charlie97L said:
that's actually not sound deadening, it's a fire prevention device. it's pretty standard on turboharged cars, my mazdaspeed protege and wrx both had it. basically if something catches on fire it melts the clips, the padding falls down, and melts over/smothers the fire (ideally). it's not a perfect system, but i do know several people who's cars were saved by this thing. pretty cool.


EXACTLY what i was gonna say...personally i think youre stupid if you remove it for ANY REASON.....

i PERSONALLY was saved by it when i had an oil fire....
 

Nick M

Black Rifles Matter
Sep 9, 2005
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meh...
mine caught on fire one time...
so Im a bit iffy on it.
I have seen them burn too, while still atached to the hood. I hadnt heard of it trying to be a fire suppressant, and that includes Toyota. Ive seen plenty of non turbo cars with it. Im pretty sure it is sound deadener/paint saver.
 

IJ.

Grumpy Old Man
Mar 30, 2005
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I come from a land down under
If the round plastic clips don't burn they'll stay up and burn but the idea is the clips burn off the blanket drops and smothers the fire.... well that's the theory!

I guess it depends on what's burning and how much ie: gas, electrical or oil fire.
 

IJ.

Grumpy Old Man
Mar 30, 2005
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LOL Charlie that and a fire extinguisher within easy reach and you're pretty well covered!

LMAO @ the dynamat guys! if it's what I think it is (black rubbery self adhesive antidrum mat) ya may as well tape plastic coke bottles of gas under there ;)!
 

IJ.

Grumpy Old Man
Mar 30, 2005
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LOL if it's the product I'm thinking of (Used in trunks and floors to stop and deaden vibration and noise) I turbo without a heat shield would get it damn close to it's flash point, I've set it on fire many times with the Oxy torch cutting out panels during repairs/modifications.
(not to mention when it's burning it pretends it's napalm and sticks to everything)
 

daledoe

KILL U
Nov 18, 2005
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the under hood dentening material is also supost to keep fire in but I put one in a fire once and the fire took off like I put some old oil in it??:dunno:
 

Satan

Supramania Contributor
Mar 31, 2005
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Searched and bringin' back to life....

Ordered some Dynamat Extreme/Xtreme (since most of my interior is out anyways)...

The kit #14055 goes for over $250 at Crutchfield and CarToys, but Amazon has it for ~$121 Shipped (free shipping on orders over $25). Thing is, sometimes you're buying from a seller (not Amazon) and you could end up paying taxes AND shipping.

I went the easier route and ordered 4 kits off of Ebay for a total of $471 ($117.75 each)... That's the way to go.

I am however, still trying to figure out what I'm gonna do for under the hood. I may end up getting some of that Dynaliner stuff later... I don't necessarily want to pay more for the Dynamat name, so if ya have something VERY effective that's cheaper, please let me know.

E
 

Poodles

I play with fire
Jul 22, 2006
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it burns badly...

for referance guys, the part is known as "Insulator, Hood" in the TSRM, don't hear anything about fire supressant...

If you can get it still, the stock mat is in the $200 range, so I'd go with a new one before that dynamat stuff...
 

adampecush

Regular Supramaniac
May 11, 2006
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Edmonton
why you guys would put a product that is typically composed of asphalt (think low flash point) near things that get extremely hot is beyond me. Add that, along with the fact that the adhesive of several sound deadening products is less than ideal at elevated temperatures, and you have a perfect opportunity for an engine bay fire.
 

Satan

Supramania Contributor
Mar 31, 2005
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I think the dynaman xtreme doesn't use asphalt tho... does it? They're specifically making this "Dynaliner" for underhood applications, so I was wondering someof the same stuff.

I'm really trying to justify spending ~$200 for a stock (old) technology, or ~$60 for something with newer technolgy/features/characteristics... oh, and it does look pretty ;-)