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TheAllSeeingPie



Member Since: 18 Apr 2012
Location: Leeds
Posts: 848

United Kingdom 2007 Range Rover Supercharged Supercharged Java Black
Soundproofed my boot (part 1)

I decided to put some sound proofing down in my boot as there seems to be a resonance coming from there, probably due to the new exhaust, that wasn't there before. It was actually quite a simple job, even though it appears Halfords don't check their exchanges properly and sold me a roll of soundproofing that was missing a 4x18" section. Fortunately I had calculated that I would have had spare and I'd already unbolted the compressor at this point.

First step was to go through the boot looking for things that had particularly thin walls, fortunately this turned out to only be the floor of the spare wheel well. So I took everything out, unbolted the compressor and cleaned out the dust and debris inside.

Click image to enlarge


Then I started working through the wheel well looking for areas that seemed especially resonant to a light tap with a spanner. I covered these using some Vibe Anti-Vibe Sound Deadening Material, which is kinda like Dynamat but cheaper.

Click image to enlarge


I then went around again and found a couple of places that now sounded the most resonant and covered those. Eventually I had covered enough that almost everywhere was much more dampened than when I had started. Here's the final result:

Click image to enlarge


You don't have to completely cover the whole boot with the stuff as it's there to reduce panel vibration which causes resonance. When my 12mm thick acoustic foam arrives (it should have been here today), I'll be covering everything over with that to completely deaden any noise being transmitted through the wheel well.

A little test drive afterwards confirmed it was definitely quieter inside the car now, and it was definitely worth the 2 hours it took to fit and the £50 of materials to do it. I've just got to adjust the resonance chambers on my exhaust to tune out a mild 2k rpm drone and my car will be quieter than when it had a stock exhaust while cruising, and fecking noisy when I want it to be. 
07 Supercharged - Still breaking her in!

Boot soundproofing part 1 - http://www.fullfatrr.com/forum/topic15612.html
Custom exhaust - http://www.fullfatrr.com/forum/topic15296.html
18" wheels for Brembo equipped cars - http://www.fullfatrr.com/forum/topic15052.html

Post #160441 29th Dec 2012 6:55pm
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47p2



Member Since: 05 Oct 2010
Location: Gone Beyond, Subaru
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Scotland 

Mine already has that factory fitted

Post #160448 29th Dec 2012 7:29pm
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Cam-Tech-Craig



Member Since: 03 Aug 2011
Location: Gloucestershire
Posts: 16146

England 2015 Range Rover SVAutobiography SDV8 Loire Blue

Did the whole on my car inside, took ages but was well worth the whisper quiet effect... Just wish i had quieter fans now! Rolling Eyes


Craig Thumbs Up

Post #160449 29th Dec 2012 7:57pm
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kingpleb



Member Since: 07 Jun 2011
Location: Maybe here. Maybe there, I get everywhere!
Posts: 8455

United Kingdom 2005 Range Rover Vogue Td6 Bonatti Grey

Iirc roofing felt is much cheaper and does te same job but is a bit heavier and not as shiny Smile

Good effort though Smile FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
Mantec Sump Guard, Rigid Load liner, MY10 BT upgrade.

Post #160452 29th Dec 2012 8:28pm
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nicedayforit



Member Since: 11 Jun 2011
Location: Beside the Solway
Posts: 3951

England 2004 Range Rover Vogue Td6 Giverny Green

I used to cut pieces of Code 6 lead sheet and glue them in place with builders adhesive. Lot cheaper than Halfords and very effective.

Post #160453 29th Dec 2012 8:31pm
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TheAllSeeingPie



Member Since: 18 Apr 2012
Location: Leeds
Posts: 848

United Kingdom 2007 Range Rover Supercharged Supercharged Java Black

Flashing tape / roofing felt is bitchumen based, the butyl stuff is nearly the same price per square metre as the Vibe stuff. Not heard of the lead stuff but it gets hot in there and I'd not be happy about a boot full of lead. Also the boot gets quite warm now so wanted something I know would stick and not stink.

Cam-tech, you're mental! If I could be bothered I probably would have covered it all, but since I have the acoustic foam coming soon, this is enough to reduce vibration and the foam reduces sound. Overall it should perform better and weight less, or at least that's the theory anyway. I'm also looking into different fans for the FFRR as I've noticed as soon as you turn them off the car is whisper quiet. 
07 Supercharged - Still breaking her in!

Boot soundproofing part 1 - http://www.fullfatrr.com/forum/topic15612.html
Custom exhaust - http://www.fullfatrr.com/forum/topic15296.html
18" wheels for Brembo equipped cars - http://www.fullfatrr.com/forum/topic15052.html

Post #160457 29th Dec 2012 9:11pm
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northernmonkeyjones



Member Since: 24 Mar 2012
Location: derby
Posts: 8479

United Kingdom 2016 Range Rover Autobiography SDV8 Santorini Black

Not with the price of lead nowadays, unless its "holy lead" of course Whistle

I did exactly the same thing on the Skoda as i thought the exhaust was a bit noisy at cruise. Used Dynamat. Dead easy to do and made a difference. Thumbs Up There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
Fiat 500x 1.4 multiair Lounge 2015
2010 LR D4 Commercial 2.7 TDV6

Post #160599 30th Dec 2012 7:50pm
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nicedayforit



Member Since: 11 Jun 2011
Location: Beside the Solway
Posts: 3951

England 2004 Range Rover Vogue Td6 Giverny Green

You don't need much lead for it to be effective.
You only need patches approx 150mm x 75mm placed in the centres of panels.
You can still get a lot of lead for £20 without resorting to the Holy variety. Very Happy
Thinking about the wheel well and resonance, I have to question the need for any added anti-vibration pads to prevent resonance given the mass of the spare wheel
located in it and fixed in place by the threaded rod fixing.
I would have thought the wheel well and surrounding metalwork was more than adequately protected by the spare wheel against any stray resonance which may be why LR appear to have chosen not to treat against it.

Post #160629 30th Dec 2012 9:57pm
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Joe90



Member Since: 29 Apr 2010
Location: Hampshire
Posts: 6397

England 

Ah, but LR didn't count on the AllSeeingPie fitting the "loudest" exhaust system he could come up with Laughing .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember Wink
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

Post #160641 30th Dec 2012 10:25pm
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TheAllSeeingPie



Member Since: 18 Apr 2012
Location: Leeds
Posts: 848

United Kingdom 2007 Range Rover Supercharged Supercharged Java Black

Just because I had the resonators removed on a straight through exhaust doesn't mean it's the loudest I could come up with ... oh er yeah I get your point! In fact I got told off by SWMBO earlier for driving "loudly" and she was 1/4 mile away in Cafe Nero!

I did a 100 mile journey today and it's dramatically reduced exhaust resonance in the cabin, so if you do want a seriously quiet car then it's worth doing.

This has been an experiment for me as designing the side-brance resonators for the exhaust has re-invigorated my appetite for physics. My uncle-in-law is a professional sound engineer (does soundproofing for cinemas and concert halls) and I've always been interested in his work.

Tomorrow I am hoping to adjust the side-branch resonators to remove the last of the motorway drone, although that's just me being picky as I am sure it's a lot quieter than it was before they were installed. 
07 Supercharged - Still breaking her in!

Boot soundproofing part 1 - http://www.fullfatrr.com/forum/topic15612.html
Custom exhaust - http://www.fullfatrr.com/forum/topic15296.html
18" wheels for Brembo equipped cars - http://www.fullfatrr.com/forum/topic15052.html

Post #160656 30th Dec 2012 11:12pm
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kingpleb



Member Since: 07 Jun 2011
Location: Maybe here. Maybe there, I get everywhere!
Posts: 8455

United Kingdom 2005 Range Rover Vogue Td6 Bonatti Grey

I think for a tunes exhaust yours won't be that bad as its still got the cats in it Smile FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
Mantec Sump Guard, Rigid Load liner, MY10 BT upgrade.

Post #160674 31st Dec 2012 12:13am
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TheAllSeeingPie



Member Since: 18 Apr 2012
Location: Leeds
Posts: 848

United Kingdom 2007 Range Rover Supercharged Supercharged Java Black

The cats are 100 cell sports cats, so are roughly 1/5th the size of the LR ones and flow a lot better Wink 
07 Supercharged - Still breaking her in!

Boot soundproofing part 1 - http://www.fullfatrr.com/forum/topic15612.html
Custom exhaust - http://www.fullfatrr.com/forum/topic15296.html
18" wheels for Brembo equipped cars - http://www.fullfatrr.com/forum/topic15052.html

Post #160715 31st Dec 2012 10:33am
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kingpleb



Member Since: 07 Jun 2011
Location: Maybe here. Maybe there, I get everywhere!
Posts: 8455

United Kingdom 2005 Range Rover Vogue Td6 Bonatti Grey

Cats are for pussy's! Wink I went the no cat route on my coop and legally as well Smile 3" turbo back exhaust with just a slightly muffled back box to avoid any boom. At full chat and on spool up the thing was monstrous and i only ran base boost Smile still the odd flame from the back proved it was worth it Very Happy
To this day people on the FCCUK still talk about the sound that exhaust made and all for a day of sitting in the middle of nowehere and spending £300 for a bespoke system to be made Smile FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
Mantec Sump Guard, Rigid Load liner, MY10 BT upgrade.

Post #160720 31st Dec 2012 10:49am
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TheAllSeeingPie



Member Since: 18 Apr 2012
Location: Leeds
Posts: 848

United Kingdom 2007 Range Rover Supercharged Supercharged Java Black

New MOT regs state that a cat must be visibly fitted from 2012 onwards hence the teeny tiny ones fitted. Also it being a 4.2 litre supercharged motor there's no chance of it passing an MOT without cats. Smile

If I could have got away with a complete de-cat I would though. Oh and mufflers are for pussies, they deflect the air around. You wanted some fat resonators instead. Wink 
07 Supercharged - Still breaking her in!

Boot soundproofing part 1 - http://www.fullfatrr.com/forum/topic15612.html
Custom exhaust - http://www.fullfatrr.com/forum/topic15296.html
18" wheels for Brembo equipped cars - http://www.fullfatrr.com/forum/topic15052.html

Post #160810 31st Dec 2012 4:08pm
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kingpleb



Member Since: 07 Jun 2011
Location: Maybe here. Maybe there, I get everywhere!
Posts: 8455

United Kingdom 2005 Range Rover Vogue Td6 Bonatti Grey

Some petrols AFTER 92/k reg can pass an MOT easily without breaking any regs and without a cat fitted Smile i know as i did it often enough and corrected examiners that were wrong Wink FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
Mantec Sump Guard, Rigid Load liner, MY10 BT upgrade.

Post #160814 31st Dec 2012 4:13pm
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