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Old 04-22-2008, 01:18 PM   #1
volvorod85
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Default Making my 245 QUIETER! UPDATE!!!#1

Ok, made a thread a while back about sound deadning my 245, well this weekend the poi came over and we tore it up. I love my 245 cause the dash comes out on 15 minutes with a socket for the steering wheel and a philips screwdriver! 1 1/4 hours to tear the interior out and we have this (after a vacuum and wipedown)







So I opted for B-quiet. Dont ask why, whats done is done and thats that. The entire floor and soon to be doors are covered in b-quiet extreme. The entire job takes about 2 rolls at 50sq. ft. each roll. Over the tunnel is the factory sound insulation as around the shifter with a second layer of B-quiet V-comp, a similar type of insulation with a rubber side and foam on the other. Im gonna put the car back together and we will see how it is. I may order more V-comp if its not what i expect. As for the doors, im gonna layer the inside of the door (inside of the outer sheetmetal) with the extreme and also try to cover all the access holes just behind the door panel.









The stuff covers nicely and is easy to install. Not to hard to cut.

My sound level meter has 2 weighting options A@30Hz-10kHz, and C@500Hz-10kHz. At the A setting, the drone and chassis noise from having poly bushings is well over 100db, cruise and normal driving from 80-92db. (thats pretty dam loud!)
With the C setting cruise was around 75db-82ish db. So you can see there is a ton of reverberation with the large sound waves at the lower frequiencies. These freqs are your brain ratteling droning lows, and all the muddy sound that makes it hard to have a quiet conversation. As soon as the car is back on the road, ill make another post with the comparisons, and hopefully get this thrown into the archive.

Mark
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Last edited by volvorod85; 05-11-2008 at 08:29 PM..
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Old 04-22-2008, 01:24 PM   #2
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Please do As I am going to do this sometime int the future... Looking Good!!1
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Old 04-22-2008, 01:30 PM   #3
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Looks good! I demand photos of the poi for my personal archive.
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Old 04-22-2008, 01:33 PM   #4
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Its awesome that you are actually measuring the sound levels!!!

very cool, if i didn't actively race my 245 I would definitely add sound deadening. Quite rides are sooo nice.
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Old 04-22-2008, 02:26 PM   #5
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Looks good! I demand photos of the poi for my personal archive.
There are no pictures of me, as I only exist on the interbutts.
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Old 04-22-2008, 02:28 PM   #6
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whats the total weight added for that?
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Old 04-22-2008, 02:35 PM   #7
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There are no pictures of me, as I only exist on the interbutts.
There is a video of your sister. She looked pretty hot.
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Old 04-22-2008, 03:28 PM   #8
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extreme weighs 0.30lb/sq. ft.
V-comp is aprox 1lb per sq. ft.

So if I use all of everything 100sq ft of extreme its 30lbs, and V-comp is 13.5 sq ft, so thats say 14lbs....
45 lbs tops id say...not to bad

Mark
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Old 04-22-2008, 03:29 PM   #9
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Originally Posted by volvorod85 View Post
extreme weighs 0.30lb/sq. ft.
V-comp is aprox 1lb per sq. ft.

So if I use all of everything 100sq ft of extreme its 30lbs, and V-comp is 13.5 sq ft, so thats say 14lbs....
45 lbs tops id say...not to bad

Mark
So if you replace the stock seats with something a bit lighter you're going to about break even.
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Old 04-22-2008, 04:46 PM   #10
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There is a T5 in place of the AW71, thats a few pounds
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Old 04-22-2008, 05:19 PM   #11
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Damn. I'm jealous.
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Old 04-22-2008, 05:34 PM   #12
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tip: replace the driverdoor rubber doorseal, it's the door which is used most often and that doorseal is usually the first to stop sealing (near the fender) when it gets older resulting in wind rushing sounds next to the A-pillar. This will start to irritate once the rest of the car is silenced.

keep up the good work, no rattles, no outside sound, way less enginedrone, it will make one mean rolling music theatre! (specially if your into classical music)
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Old 04-22-2008, 05:45 PM   #13
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Originally Posted by Janspeed View Post
tip: replace the driverdoor rubber doorseal, it's the door which is used most often and that doorseal is usually the first to stop sealing (near the fender) when it gets older resulting in wind rushing sounds next to the A-pillar. This will start to irritate once the rest of the car is silenced.

keep up the good work, no rattles, no outside sound, way less enginedrone, it will make one mean rolling music theatre! (specially if your into classical music)
Good to know, there has always been sone wind noise thats puzzeled me. I have noticed though, without the rocker covers in place, that all the door seals have at least a 1 inch gap at the botom of the doors, where I assume they have shrunken

Mark
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Old 04-22-2008, 05:47 PM   #14
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All the door and window seals on my '82 242 shrank so much they stopped sealing in one place or another. Heat gun was the cheap solution
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Old 04-22-2008, 06:08 PM   #15
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Im gona just grab one from the bone yard and cut sections for the bottom, and glue one end to the orignal seal with weather strip seal
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Old 04-22-2008, 07:54 PM   #16
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Great thread and great pics, I will keep this for future reference. Would like to do same to my 245 in the future.
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Old 04-22-2008, 10:15 PM   #17
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holy
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Old 04-22-2008, 11:39 PM   #18
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I've been meaning to do this..
PLEASE post comparisons as soon as possible.. maybe i can do it this afternoon.
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Old 04-23-2008, 01:32 PM   #19
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I bet you'll also notice a reduction in heat coming up from the road i bet
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Old 04-23-2008, 01:56 PM   #20
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I bet you'll also notice a reduction in heat coming up from the road i bet
much redundancy much?

When I put my 6x9s in the doors I told myself that one of my future mods will have to be sound dampening...those doors are so empty!

Even though I autoX, this mod seems worth it since my racecar is also my DD.
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Old 04-23-2008, 09:00 PM   #21
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this mod seems worth it since my racecar is also my DD.


you GOTTA love turbobricks!! (not making fun, i do the same thing)
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Old 04-23-2008, 09:27 PM   #22
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Oh no worries...I think it's hilarious too.

I had a passenger for one of my runs and at the grid one of the comments was: "do you want a couple more passengers so it looks more like a family?"

Another: "I've never seen a Volvo wagon at one of these"



no real upgrades yet because I didn't want to go through the upgrade process without the justification of an AutoX addiction

But since it's now been raced, it's a RACECAR! (and I'm a racecar driver...cool)
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Old 04-23-2008, 09:46 PM   #23
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Nice! Are you going to put anything on the roof?
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Old 04-23-2008, 11:59 PM   #24
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none on the ceeling...thats too far me thinks. I will post results in a week or two when the suspension is done and everything is back together.
Mark
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Old 04-24-2008, 01:36 AM   #25
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very interesting! where did you source the dampener from? how much was it? just one of the things that make or break a daily driver in my opinion. nice work! i plan on it in my 242.
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