Author Topic: And one more question on the insulation......hood??  (Read 4563 times)

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Offline kc79ta

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Re: And one more question on the insulation......hood??
« Reply #15 on: May 16, 2011, 10:13:45 AM »
I didn't know there was going to be a test. :-\

If not for heat protection....I don't think sound.

Was it to help keep the heat in or out of the engine bay?
Keith

Offline Burd Turd

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Re: And one more question on the insulation......hood??
« Reply #16 on: May 16, 2011, 11:06:58 AM »
With insulation i'm thinkin heat?
Born and Raised in South Detroit Bitches

Offline Tin Indians Rule

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Re: And one more question on the insulation......hood??
« Reply #17 on: May 16, 2011, 10:01:38 PM »
well??
What's she wearing now? Come on!
1976 Black 455 4 speed (current project)
1976 White 400 Auto (original)
F-body stuff stashed everywhere.
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Offline Burd Turd

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Re: And one more question on the insulation......hood??
« Reply #18 on: May 16, 2011, 10:38:36 PM »
I've been staring at my screen, come on!
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Offline kc79ta

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Re: And one more question on the insulation......hood??
« Reply #19 on: May 17, 2011, 08:52:17 AM »
Waiting.... ::)
Keith

Offline ta78w72

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Re: And one more question on the insulation......hood??
« Reply #20 on: May 18, 2011, 09:43:00 AM »
It's both heat and sound.  I know what Brett's going to say it's for. 

Offline Burd Turd

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Re: And one more question on the insulation......hood??
« Reply #21 on: May 18, 2011, 09:50:22 AM »
He doesn't know
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Offline Tin Indians Rule

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Re: And one more question on the insulation......hood??
« Reply #22 on: May 18, 2011, 09:55:44 AM »
I say fire retardant also in addition to sound.
What's she wearing now? Come on!
1976 Black 455 4 speed (current project)
1976 White 400 Auto (original)
F-body stuff stashed everywhere.
Always buying/selling/trading  just ask!

Offline kc79ta

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Re: And one more question on the insulation......hood??
« Reply #23 on: May 18, 2011, 01:09:50 PM »
I don't see (or should I say hear) how it would help with sound. Who would it block engine noise from? I don't think it would help for inside the car...maybe...not sure. I'm just thinking out loud here.
Keith

Offline Tin Indians Rule

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Re: And one more question on the insulation......hood??
« Reply #24 on: May 18, 2011, 01:24:43 PM »
Sometime in the late 70's autos had to pass a drive by test. They could not exceed a specified level of noise pollution if i remember the article correctly. It wasn't cabin noise. It was based on something like passing a fixed object at a certain speed and the db level had to be ????
What's she wearing now? Come on!
1976 Black 455 4 speed (current project)
1976 White 400 Auto (original)
F-body stuff stashed everywhere.
Always buying/selling/trading  just ask!

Offline Burd Turd

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Re: And one more question on the insulation......hood??
« Reply #25 on: May 18, 2011, 01:28:05 PM »
Ya, thats why the shakers were closed up, again California BS!
Born and Raised in South Detroit Bitches

Offline RENOVATIONS

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Re: And one more question on the insulation......hood??
« Reply #26 on: May 18, 2011, 01:50:23 PM »
I don't have an answer myself as to "why" but it would stand to reason that the insulation would absorb heat (to protect the hood/paint) as well as provide some barrier to engine noise to the outside...but in regards to it's use as a noise barrier it would seem more useful on an "open" hood (shaker hood) than a closed hood (base flat hood), yet they were installed on the latter  :P

Again, they were used on flat hoods and turbo hoods from the factory but not shaker hoods.
As to why not shaker hoods...I for one am not going to lose any sleep trying to figure out the decisions that automotive engineers (past or present) make  ;)
Jeff

Projects:
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1978 Trans Am
1970 Camaro
1970 'Cuda

Offline Tin Indians Rule

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Re: And one more question on the insulation......hood??
« Reply #27 on: May 18, 2011, 01:54:59 PM »
Biggest thing to consider is the insulation came on flat hoods. Well ever see a flat hood Trans am? So I dont think protecting the decal is the answer.
What's she wearing now? Come on!
1976 Black 455 4 speed (current project)
1976 White 400 Auto (original)
F-body stuff stashed everywhere.
Always buying/selling/trading  just ask!

Offline PA Formula 78

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Re: And one more question on the insulation......hood??
« Reply #28 on: May 18, 2011, 02:40:20 PM »
Is it to make the under side of a freshly painted hood look extra ugly?
2005 Volvo S40 T5 AWD (daily driver)
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Offline Burd Turd

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Re: And one more question on the insulation......hood??
« Reply #29 on: May 18, 2011, 03:55:13 PM »
I'm with ya on that, I use a detail mist on the inside and it looks new.
Born and Raised in South Detroit Bitches