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Old 07-08-2002, 08:26 PM   #1
DoinkMobb
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Default who has removed the sound deadening material from their car?

Not sure where to post this. Sort of a performance mod, but doesn't pertain to NA or turbo.

I know of one person who has done this, Evan J. Kelly, but I'm wondering if anybody else has done this.

I have next Sat and Sun off, so I was planning on taking out everything that is attached to the floor of the car, and chiseling away at the sound deadening tar, with a hammer and a paint scraper (or something wide and flat). The sound deadening tar in the trunk and under the backseats is easily accessible, but I'm wondering what I have to remove to get at the tar in the front of the car (besides the seats and the carpet).
Evan J. Kelly mentioned using a heat gun, but I wonder how necessary this is and I have no idea where to get one. It's going to be hot and dirty work, but hopefully I'll notice a difference. At the very least I'll be able to live out my Gran Turismo fantasies and say I performed Weight Reduction Stage 2 on my car. And I guess the neighbors will think I'm insane too.

I've already removed the donut, trunk lining, intake silencer and some plastic pieces attached under the seats. Not a whole lot, but in addition to removing the sound deadening material, it should make somewhat of a difference.

Also, does anybody know where I can weigh my car?
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Old 07-08-2002, 11:52 PM   #2
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somebody call the men in white........ yep, I'd say too much time in the Florida sun has made you delirious.

Peeling tar off the floor boards is not much fun and maybe not noticeable in the end except a little noisier and little hotter on your feet. Definitley will want a heat gun.

Other ways to save weight: remove the spare tire and jack, relocate the battery (no savings, just better distribution), lighter wheels......if it's just to be faster on a track, you can remove rear seats, drill holes in the floor boards, inflate tires with helium, break out all windows, and of course find a midget to do the driving.

well, some of those might work.


G
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Old 07-09-2002, 02:30 AM   #3
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Incorect Gonz. There is ~100lbs of sound deadening material inside and underneath our cars...

http://forums.nasioc.com/forums/show...hreadid=138552
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Old 07-09-2002, 02:34 PM   #4
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yep.... amazing what 3 rally stages will do...
hehehehe
the sound deadening material is all gone!

you can try chiseling it...
and also try a heat gun....

no easy way about it...
just lots of patience...

good luck
Jamie
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Old 07-09-2002, 02:52 PM   #5
jk147
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don't tell me you are going to rip out the interior material, carpet and plastics. I see people do that with their civics all the time to make it "weight less." Totally pointless if you ask me. Just get more boost.
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Old 07-09-2002, 05:56 PM   #6
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Quote:
Originally posted by jk147
don't tell me you are going to rip out the interior material, carpet and plastics. I see people do that with their civics all the time to make it "weight less." Totally pointless if you ask me. Just get more boost.
just take off the doors if u wanna reduce weight
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Old 07-09-2002, 05:57 PM   #7
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Quote:
Originally posted by panteedropper


just take off the doors if u wanna reduce weight
oh yeah, if you race 1/4.......then u can take off the steering wheel, cause u gonna be going straight anyways - lol j/k
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Old 07-09-2002, 07:54 PM   #8
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Quote:
Originally posted by jk147
don't tell me you are going to rip out the interior material, carpet and plastics. I see people do that with their civics all the time to make it "weight less." Totally pointless if you ask me. Just get more boost.
Before you lump me in with Civic owners who "live their life a quarter mile at a time", maybe you should reread my post. I said I was going to take out everything on the floor of the car, chisel out all the sound deadening tar and then put everything back in.
Making my car "weight less" would be impossible, but I would like it to weigh less. I can't get more boost if I don't have any in the first place.

It seems a few of you think I'm insane, but oh well. I have no money for turbo kits or engine swaps, so lightening my car by about ~100 lbs. seemed like a good idea. It's all about the power:weight ratio, my friends. In my book, lighter = better.

Subie Gal - how hard was that crap to get out? How much material (in lbs.) do you think you removed?
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Old 07-09-2002, 10:06 PM   #9
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Sorry. I just wanted to make the point that it is going to be a LOT of work to get that sound absorbing material all out and the results may be lots of noise and not necessarily a lot of performance improvement.

How much are you willing to sacrifice in order to be 0.05 seconds faster through a quarter mile? I mean sacrifice in terms of noise and heat coming into the car from below.

As an example. let's estimate your car weighs 2800 pounds and produces 140 HP. That's 20 lbs per HP.

If you are able to reduce weight by 100 pounds the ratio would be 2700/140 = 19.28 or about the same as if you added 5 horse power to your car.

It just seems like a lot of work. I've peeled off some of this stuff to fix rust holes in the floor boards of my BMW 2002, and it isn't much fun to do. Just an advisement, it's tedious work.

Maybe you can do some 0-60 testing before and after and then let us know how much of improvement in that area you get.

good luck.

Gonz
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Old 07-09-2002, 11:05 PM   #10
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I took out all the sound deadening insulation from my eagle talon...however it went along with the carpet, the seats, the interior panels, the hood cross members, and all the little things (Like AC) that I didn't need....

Nah, just get a heat gun, a flathead screw driver, and mineral spirits so you can scrub your floorboard clean.


reading the previous posts gets me mad....does anyone realize how much weight plays a role in things....such as racing 1/4 mile, auto-x, rally-x, track racing. If you gain 5 hp or the equivalent of that's one thing, but you'll feel it most in the steering wheel....
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Old 07-09-2002, 11:06 PM   #11
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100lbs huh? Hmm... It would offset my stereo equipment. Although, remove both and now I'm 200lbs lighter!
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Old 07-09-2002, 11:59 PM   #12
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Quote:
Originally posted by Gonz
How much are you willing to sacrifice in order to be 0.05 seconds faster through a quarter mile? I mean sacrifice in terms of noise and heat coming into the car from below.

As an example. let's estimate your car weighs 2800 pounds and produces 140 HP. That's 20 lbs per HP.

If you are able to reduce weight by 100 pounds the ratio would be 2700/140 = 19.28 or about the same as if you added 5 horse power to your car.

Maybe you can do some 0-60 testing before and after and then let us know how much of improvement in that area you get.

good luck.

Gonz

I'm not worried about the noise. It's not like my car is silent like an S class or whatever. I sat in one of those at an auto show, quite the soundproofing in that thing.

As for my car, it weighs 2400 lbs. and has 110 HP - a power to weight ratio of 21.8:1.
Reducing my weight by 100 lbs. will bring that number down to 20.9:1. That would have the same effect as adding ~5 HP, you're right.

Taking out 100 lbs. will have a greater effect on my car, rather than on a heavier car, like an RS or WRX.

2400 lbs - 100 lbs = 4.2% decrease in weight (my car)
2800 lbs - 100 lbs = 3.6% decrease in weight (RS)
3100 lbs - 100 lbs = 3.2% decrease in weight (WRX)

I don't care about 1/4 mile or 0-60 times, it's just that a lighter car will be able to corner better, get better gas mileage, accelerate better, stop faster, overall it will everso slightly improve all these things.
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Old 07-10-2002, 02:11 AM   #13
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Who cares about 1/4 mile junk?

100lbs helps ALOT in an autocross!
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Old 07-10-2002, 05:05 PM   #14
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Actually, I never used a heat gun.

I just used a mallet and a couple of Stanley chisles... which I can no longer use.

After all that, I took some heavy duty gunk/tar remover, 4 bottles worth to be exact, and used about 50 terry cloths to wipe everything else away... ended up taking so much paint away that I was pretty much forced to repaint the inside... That's okay though, as now I have a gold floor(hides dirt very well).

Anyway, Best thing I've done to my car yet.
Totally changed the performance of the car, for the better.

But wow, I'd be impressed if you got it done in a weekend.
My car was torn apart for almost 2 full weeks...
Of course, I had no direction, and had to guess at which tools to use; so it shouldn't take you anywhere near that long.

Good luck though,
feel free to ask anything,

~Evan J. Kelly
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Old 07-10-2002, 05:14 PM   #15
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Quote:
Originally posted by Evan J. Kelly
But wow, I'd be impressed if you got it done in a weekend.
My car was torn apart for almost 2 full weeks...
Wowsers, I don't know if I'm that motivated yet!
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Old 07-10-2002, 05:42 PM   #16
Evan J. Kelly
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Smile

I had extra wheels and it was summer, and I was bored.

But all in all, I would say that I was working for about three full days sweating away in my car. Meaning 36 hours of actuall work. Only me. Nobody else. I could only take so much a day.

~Evan
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Old 07-10-2002, 06:57 PM   #17
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I can start tearing stuff out of my car at about 4:30 on Friday, then I have all day Sat and Sun to chisel away, and I have until 6 pm Monday to put everything back in. I'm going to see if I can lure some fellow i-clubbers into helping me. Free beer and/or food might work.
I guess I need to get to Lowe's and grab a hammer and some chisel type instruments. The gunk remover is a good idea, I didn't think of that. Do you think dousing the tar with some gunk remover or some other type of solvent would loosen it up so it'd be easier to remove? Anything to make the job easier...
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Old 07-10-2002, 07:10 PM   #18
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Ha ha, I think it'll take some serious amounts of beer before anyone wants to help you with that.
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Old 07-10-2002, 09:43 PM   #19
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Don't forget that there's lots of ways to reduce weight, when you have the interior apart. Removing the tar is one way, removing some of the bolt on metal bars is another. Pretty much, when you have the interior completely apart, you'll find things that you can toss without losing much when you put the important things back in. IE: carpet insulation can be tossed, side impact beam can be tossed (at your own risk).

Last edited by obyone; 07-10-2002 at 10:21 PM.
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Old 07-10-2002, 09:57 PM   #20
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You can save about 2-3 lbs just by tossing those green army shields on the injectors.

I don't think you are crazy. I feel as though you are goiong to be feeling it alot. I have been considering getting rid of the carpet padding, and the sound deadening tar. Na...too much work!

Andy
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Old 07-11-2002, 12:40 AM   #21
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Why the f* is this in the N/A engine forum!?!?!?!

I swear, sometimes I wonder why i'm not a moderator...
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Old 07-11-2002, 06:01 PM   #22
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Quote:
Originally posted by Kostamojen
Why the f* is this in the N/A engine forum!?!?!?!

I swear, sometimes I wonder why i'm not a moderator...
Yeah, I'm not sure why it was moved. All Imprezas have sound deadening material in them, not just NA Imprezas. If I had a turbo car, would this be put in the turbo forum? This has nothing to do with my engine...
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Old 07-11-2002, 06:25 PM   #23
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Smile . . . . tien springs . . . mmmm .

The stuff can be chisled away in big chips if you get good at it.

Maybe try getting under an edge and squirting some of the gunk remover on Just where it is adhered to the metal... once it starts coming apart into smaller pieces I found it to be much harder to get off, especially without marring up the metal.

~Evan
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Old 07-11-2002, 07:15 PM   #24
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Removing the sound dampening material from the car sounds cool and I have seen it done on older impalas, and mustangs. It seems real easy but time consuming. Why not just remove the back seat, and get one of those small and almost useless spare tyres?
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Old 07-11-2002, 07:38 PM   #25
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Default weight reduction

I saved as much of the stuff as I could and it only weighed 35# or so.
I used dry ice and the sound deadening cracked off nicely except where the mastik glued to it at the drain holes and seams.
I got 25# of dry ice sliced into 1" thick squares and placed it around floor of the car. After an hour, the roof was even cold. A hammer tap would remove sheets at a time. The dry ice didn't make a mess and it lasted long enough to do 2 or 3 cars so hurrying wasn't required, in fact I made it harder on myself by trying to hurry too soon. Wait, and you'll hear it crack and seperate on its own. Because the whole car got cold, even the vertical surfaces came clean easily. a lot of the stuff is under the heater box and down the tunnel so there's a lot to remove inside to get it all.
Under the car wasn't a problem because the gravel is taking care of that stuff a little more each rally.
RZ
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