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#1 |
Registered User
Join Date: Oct 2015
Location: PNW
Posts: 3,587
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Hood insulation: Why? Do you keep it or don't you?
I posted this over in SquareLand but I figured I would see if I could get input from people that hang out in other parts of the forum since the topic applies to more than squarebodies.
I've had some vehicles with hood insulation and some without. From a high performance mindset, I can't see how it would help. Unless you live way up north in Coldlandia or Coldaska and have a hard time maintaining operating temperature, I don't see how there's a benefit except at initial startup/warmup. I can more easily make a case that it's there just to suppress sound. We all know that NVH is really important to the manufacturers. I would imagine that quiet seems smooth, and smooth + quiet probably help sell vehicles on test drives. Once up to operating temperature, it seems that any insulation would have a negative effect on performance. There is a lot of air going over the top of the hood that could draw heat out of the engine compartment. The closest thing to the hood is typically where the air and fuel are being drawn in. Any drop in temperature in that area sure seems like it would be a performance gain however minimal. I'm considering pulling the hood insulation out of all of my rigs. I don't mind hearing the motor when it's doing its job. And generally speaking, if it's not revving up, then I don't think it's going to transmit much noise through the hood through the windshield and into the cabin. And I don't mind startling innocent bystanders and woodland creatures when I drive by. What do you guys think: Keep it, add it, toss it? |
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#2 |
Post Whore
![]() ![]() Join Date: May 2015
Location: Alabama
Posts: 14,636
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Re: Hood insulation: Why? Do you keep it or don't you?
my 81 came with the insulation...but it looked crappy...so I replaced it... more for visual than anything
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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#3 |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Hood insulation: Why? Do you keep it or don't you?
Some say it's to keep the paint from fading due to engine heat others for noise. Because of the thinner metal used it's probably for both reasons but I see more vehicles with hood insulation that have faded hood paint than I did when they didn't have insulation.
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68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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#4 |
1965 Chevy C10, 2005 4.8L/4l60
![]() Join Date: Aug 2004
Location: DFW Texas
Posts: 8,541
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Re: Hood insulation: Why? Do you keep it or don't you?
All about engine noise!
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Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 ![]() ![]() ![]() support our troops! |
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#5 |
Registered User
![]() Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
Posts: 2,629
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Re: Hood insulation: Why? Do you keep it or don't you?
I ripped that moisture trapping crap outta there. Now I can watch the tune on the engine just by driving down the road!
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#6 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,939
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Re: Hood insulation: Why? Do you keep it or don't you?
Mine didn't have any from the factory (1972), and I ain't adding any...
Plus... I happen to like engine noise. ![]() Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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bystanders, heat, insulation, performance |
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