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sbarnham
Member Since: 07 Nov 2007
Location: Blue Mountains
Posts: 103
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Guys,
I just got a rackmaster 1.6m rack put on at opposite lock + a set of 245/70R17 Cooper STT. They look great.
On the way home I noticed the tyre rumble, more than I expected, BUT I then got onto the motorway coming home and the noise from the rack at 100km/hr is deafening. It gave me a headache. Can't imaging how I am going to do 3000km corner country trip with that noise.
Solutions ?
Does it get quieter when it's full ? Plan to put tyre, gas bottle and roof bag up there.
Should I put a sheet of ply on it to reduce the noise ?
Will an air deflector help ?
HELP !!
Bye,
Scott New MY15 TDv6 D4 in Buckingham Blue
Previously 2005 TDV6 HSE in Cairns Blue
- LR Steel Bar & Lights, Cooper STT 245/70R17 on LR 17", ContiCrossContact UHP 255/60R18 on LR 18", Traxide/Optima Yellow Top, GME 3440 UHF, FrontRunner Roofrack.
Previously 1999 TD5 in Blenheim Silver
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 25th Jun 2008 12:15 pm |
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StornowaySA
Member Since: 23 Sep 2007
Location: Adelaide
Posts: 406
 
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Scott, I definitely remember reading on this site where guys in UK made their LR Expo rack much quieter by putting a "skirt" at the front between the roof and the rack (to make a smooth airflow over the rack....not sure what the OL rack looks like but this might be an option; search on this site for Expedition rack and you'll probably find the thread I'm talking about; I'll look now too. MY2010 D4 HSE 3.0, e-diff, 19inch MTR's; LLAMS Height adjustor, LR f & r light guards, LR side steps, LR bright finish side door mouldings; LR/Mantec G4 front bash plate, LR G4 Winch kit, Warn 9500lb Winch; GOE compressor guard, Uniden UHF, LR bright finish roof rails, LR G4 driving light kit, LR G4 ladder, 4 x extra rear compartment 12V sockets, Traxide dual battery system and Optima Yellowtop battery, ORS drawer system / fridge slide, LED rear compartment lighting.
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| 25th Jun 2008 12:31 pm |
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tanters
Member Since: 24 Oct 2007
Location: Oireland
Posts: 4287
  
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I think that it's gotta be rigid in its own right - you screw it into the rack at the front and then fold it back onto the roof and it's simply taped to the roof - I gathered that from the photos atleast 
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| 25th Jun 2008 1:20 pm |
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catweasel
Member Since: 05 May 2006
Location: Bundaleer
Posts: 4805
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tanters wrote:I think that it's gotta be rigid in its own right
not so
AndrewS wrote:and held in place with a strip of hard but flexible plastic
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| 25th Jun 2008 1:39 pm |
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tanters
Member Since: 24 Oct 2007
Location: Oireland
Posts: 4287
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Hands in the air....I stand corrected 
I'll get my coat 
Edit:
I'm taking off my coat....
What if you could get your hand on some hard rubber, that would sort it too....wouldn't it
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| 25th Jun 2008 1:49 pm |
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MrH
Member Since: 08 Aug 2007
Location: lost in the forest
Posts: 7754
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I can only recommend this neoprene skirt solution I think the stuff AndrewS got me was about 3-4mm thick, so stiff but flexible - fitted before we did a 2k mile trip and it really made a huge difference. LRs are a fond memory, apart from the maintenance.
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| 25th Jun 2008 2:05 pm |
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Jamo
Member Since: 18 Jan 2006
Location: Esperance, Western Australia
Posts: 1170
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Scott, did you fit the deflector that comes with the rack?? It goes on underneath at the front.
I have a rackmaster (which is a re-labelled frontrunner) and it makes some wind noise but it's definitely not deafening.
Also there is a thread in the African section about making sure the rack is level. If it's not level then the noise is very bad. Have a nice day!
2010 Cayenne Diesel with PASM & Off Road Pkg
2005 HSE D3 (Sold)
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| 25th Jun 2008 2:15 pm |
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Big Fish
Member Since: 30 Oct 2005
Location: Dorset
Posts: 172
 
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The skirt option definetly worked for my expo rack.
Good luck 
Big Fish It's silver, enough said!
Live life by one rule - He who dies with the most toys - Wins!!
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| 25th Jun 2008 10:05 pm |
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sbarnham
Member Since: 07 Nov 2007
Location: Blue Mountains
Posts: 103
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Jamo wrote:Scott, did you fit the deflector that comes with the rack?? It goes on underneath at the front.
I have a rackmaster (which is a re-labelled frontrunner) and it makes some wind noise but it's definitely not deafening.
Also there is a thread in the African section about making sure the rack is level. If it's not level then the noise is very bad.
Jamo,
I had opposite lock install the rack and tyres late yesterday, and as far as I can see there is a deflector installed under the rack near the front, but it's not the full width of the rack.
But you know, after driving it again this morning I wonder if it's actually the STT's creating the noise -- the problem with doing more than 1 thing at a time.
I think I will remove the rack and see if it's the tyres.
I can't see how I can drive 3000km for our trip with the noise -- be it tyres or rack.
I have never had mud tyres, but if my suspicion turns out correct, I now wish I had gone Mickey ATZ ... expensive mistake.
How noisy do you find your MT over your HT ?
Bye,
Scott New MY15 TDv6 D4 in Buckingham Blue
Previously 2005 TDV6 HSE in Cairns Blue
- LR Steel Bar & Lights, Cooper STT 245/70R17 on LR 17", ContiCrossContact UHP 255/60R18 on LR 18", Traxide/Optima Yellow Top, GME 3440 UHF, FrontRunner Roofrack.
Previously 1999 TD5 in Blenheim Silver
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| 26th Jun 2008 3:39 am |
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PCH
Member Since: 12 Jan 2005
Location: Anywhere but work
Posts: 812
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I personally didn't think the STT's were that noisey. The pattern does generate more road noise but not anywhere near as much as my old Tradesman roof rack.
Scott, I can tell you if I drove in a cross wind the Tradesman rack can make a lot of noise. Maybe the same with the Rackmaster.
Chris 2011 Discovery 4 (MY12) SDV6 HSE with General Grabber AT's, Traxide Aux Battery system, custom rear drawers and Autosafe half height cargo barrier
Gone - 2005 Discovery 3 TDV6 HSE
ARB Bull Bar, Warn 9.5XP Winch, IPF D/Lights, Cooper STT's, LR Raised Air Intake, Traxide aux battery system, custom drawers and half height Autosafe cargo barrier, Mitchell Bros 4x4 tow hitch
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| 26th Jun 2008 4:47 am |
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Jamo
Member Since: 18 Jan 2006
Location: Esperance, Western Australia
Posts: 1170
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Scott,
If it's your tyres, then it's time to have the wheel alignment checked.
When even one of my wheel was out, the noise from the STT's went up exponentially!
As soon as I'd had the alignment done, the noise dropped considerably. Have a nice day!
2010 Cayenne Diesel with PASM & Off Road Pkg
2005 HSE D3 (Sold)
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| 26th Jun 2008 5:56 am |
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sbarnham
Member Since: 07 Nov 2007
Location: Blue Mountains
Posts: 103
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Thanks guys, very helpful advice.
I will take the rack off tomorrow and prove if rack or tyres.
If tyres, I will get wheel alignment since it's in for service on Monday. New MY15 TDv6 D4 in Buckingham Blue
Previously 2005 TDV6 HSE in Cairns Blue
- LR Steel Bar & Lights, Cooper STT 245/70R17 on LR 17", ContiCrossContact UHP 255/60R18 on LR 18", Traxide/Optima Yellow Top, GME 3440 UHF, FrontRunner Roofrack.
Previously 1999 TD5 in Blenheim Silver
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| 26th Jun 2008 7:31 am |
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sbarnham
Member Since: 07 Nov 2007
Location: Blue Mountains
Posts: 103
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Well, with the rack off, I can say it's definitely more the tyres than the rack.
The Cooper STT's howl from 45-55km/h and then 95-115km/h. They are bearable outside those speeds. Road surface makes a huge difference too. The M4 in Sydney has been resurfaced with super smooth tar, and is VERY noisy. Which is odd, it is the quietest road with my road tyres ... go figure.
So I guess I will have to sit on 120km/h on our trip till we get to the dirt ...
I will get the alignment checked on Monday as Jamo suggested ... especially since I noticed today that going around left curves at 90km/h was quieter than straight ahead and right hand curves. Wonder if that's an alignment issue. New MY15 TDv6 D4 in Buckingham Blue
Previously 2005 TDV6 HSE in Cairns Blue
- LR Steel Bar & Lights, Cooper STT 245/70R17 on LR 17", ContiCrossContact UHP 255/60R18 on LR 18", Traxide/Optima Yellow Top, GME 3440 UHF, FrontRunner Roofrack.
Previously 1999 TD5 in Blenheim Silver
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| 28th Jun 2008 9:25 am |
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