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Old 07-04-2017, 04:40 PM   #1
JSwag420
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Is It Okay to Remove the Hood Insulation?

That carpet like thing under my hood is absolutely disgusting. Not only is it falling off, there's dust and other shit that comes out of it when you touch it. It's also falling apart. I can't believe the garbage VW puts under the hood.

I did some research and I read that many people just removed theirs. I also read a few posts where people say removing it will cause your paint to be destroyed. I live in Florida where it's over 100 degrees most of the time so that's concerning to me. If you touch my car in the hot sun, it's enough to burn you. Will the engine + heat from the sun cause any damage if I remove this? I really wish I mentioned this before my warranty expired so I could have had it replaced. Will it also become hotter under the hood without it?
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Old 07-04-2017, 04:58 PM   #2
1ashchuckton
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My thought is that VW put that thing there to quiet down the sounds coming from the engine compartment. The DI engine does not make a quality sound. I can't see how that is going to hurt your paint. You can always buy a new one & replace the ragged out one.
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Old 07-04-2017, 05:02 PM   #3
riceburner
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i don't think so, I havent had a hood blanket on any of my cars in years this one included. absolutely no paint issues. don't believe me, take a look at your paint inside the hood closest to the turbo, that should be the hottest your paint gets and it's not burnt.

it's for noise suppression and apparently should you ever catch a fire it is supposed to fall apart and help extinguish it.
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Old 07-04-2017, 05:20 PM   #4
JSwag420
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Quote:
Originally Posted by riceburner View Post
i don't think so, I havent had a hood blanket on any of my cars in years this one included. absolutely no paint issues. don't believe me, take a look at your paint inside the hood closest to the turbo, that should be the hottest your paint gets and it's not burnt.

it's for noise suppression and apparently should you ever catch a fire it is supposed to fall apart and help extinguish it.
Will probably just remove it then. I'm kicking myself for not mentioning it before my warranty expired.
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Old 07-04-2017, 05:23 PM   #5
riceburner
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enjoy being able to hear your intake/dv sounds if upgraded primary reason i removed mine. it's a real game changer noise-wise.
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Old 07-04-2017, 06:08 PM   #6
Sauce118
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Mine has been removed for some time now.. It might just be in my head, but I also remove the seal towards the windshield wipers (unless I'm washing my car); I think it helps circulate the air much better, it also gives a more connected sound from under the hood. It also helps you be able to hear the Intake sound like a vacuum cleaner. But the car is def quieter with the insulation installed, and I would think if it got TOO HOT under the hood, you might damage your paint from the heat... But mine has been out since I bought the car, it looks super clean if you keep the underside of the hood clean as well.
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Old 07-04-2017, 06:51 PM   #7
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^yes removing the cowl strip also makes a difference in sound - although it has been said by someone that it adversely affects aerodynamics as well as under-hood air circulation.
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Old 07-04-2017, 08:57 PM   #8
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I've actually been wondering this myself lately. I've never driven the car without the insulation and I'm curious what it sounds like now that I have an intake for my stage 2. I use a shop vac to clean my insulation pretty regularly and after 4 years/49k, its still in really good shape. I also thought maybe the heat from the engine would affect the paint on the hood but its good to hear it does not. I think I'm going to remove it over the weekend and try driving it around for the day to see what it sounds like.
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Old 07-04-2017, 09:24 PM   #9
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^yes removing the cowl strip also makes a difference in sound - although it has been said by someone that it adversely affects aerodynamics as well as under-hood air circulation.
I think ModShack posted a while back that it lowers engine bay temperatures, but I don't know if anybody has shown if this has lowered engine or intake temperatures.

Without testing I can only speculate, but given that the area at the base of the windshield is a high pressure area, air enters the engine bay at that spot if you remove the cowl strip which should lower ambient air temperatures around the turbo as cool air comes in and exits beneath the car.

Allowing air to enter the engine bay in a spot that's not through the cooling stack I believe that you're probably not doing your radiator and intercooler any favors. But again, only speculating based my understanding of how air passes through/around most cars.

As far as adverse effect to aerodynamics..... it's probably not much, but the goal is to keep as much air from going under the car as possible because this causes lift. How much lift in this case? I have no idea, probably not much, but it's probably a tiny (immeasurable?) step in the wrong direction. Surely not enough to fuss over if you like the extra sound.
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Old 07-04-2017, 09:34 PM   #10
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I removed it and also have the ModShack cowl strip mod for the last few years, no issues in hot/humid Houston.
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Old 07-04-2017, 10:07 PM   #11
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Quote:
Originally Posted by Short Bus View Post
I think ModShack posted a while back that it lowers engine bay temperatures, but I don't know if anybody has shown if this has lowered engine or intake temperatures.

Without testing I can only speculate, but given that the area at the base of the windshield is a high pressure area, air enters the engine bay at that spot if you remove the cowl strip which should lower ambient air temperatures around the turbo as cool air comes in and exits beneath the car.

Allowing air to enter the engine bay in a spot that's not through the cooling stack I believe that you're probably not doing your radiator and intercooler any favors. But again, only speculating based my understanding of how air passes through/around most cars.

As far as adverse effect to aerodynamics..... it's probably not much, but the goal is to keep as much air from going under the car as possible because this causes lift. How much lift in this case? I have no idea, probably not much, but it's probably a tiny (immeasurable?) step in the wrong direction. Surely not enough to fuss over if you like the extra sound.
thanks for the reply, i can see what you're saying.

yes, to all considering, DEFINITELY try both 'mods' - the best free mods you can do, literally adds so much intake/turbo noise. its worth it considering it also adds some unwanted DI/valvetrain noise.
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Old 07-04-2017, 10:10 PM   #12
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Removed mine years ago. Paint is 100% and noise is no different.
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Old 07-04-2017, 10:29 PM   #13
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I'm in SW FL and took mine out a few years ago, hood still looks the same.
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Old 07-05-2017, 02:37 AM   #14
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Take the hood insulation and weather strip out and throw them both in the trash can, now enjoy hearing the baby K03 spool
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