Member Since: 21 Nov 2020
Location: Canary Islands
Posts: 129
Do the different terrain response modes affect suspension?
Around here there are a lot of washboarded or corregated roads.
I am wondering if any of the terrain response modes would help to soften the bone shaking.
https://en.wikipedia.org/wiki/WashboardingPre-Production
D3 V8 #264
LHD '04 HSE
Living its life as a 50/50 On/Off road car exploring the Canary Islands
27th Nov 2020 7:57 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10382
Don’t think so.
Some modes raise the suspension height. But you can request that yourself
27th Nov 2020 8:17 pm
Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
I have a aftermarket unit fitted to the air suspension... so i can raise (and lower) the D3 independent from the terrain reponse.... (no speed limits regarding heights)
So when driving let’s say 80 km/h on bumby roads, i just raise the suspension... i think it softens the drive then significant..... no idea regarding washboards... did not tried that yet..Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
27th Nov 2020 8:39 pm
McAdam
Member Since: 21 Nov 2020
Location: Canary Islands
Posts: 129
@Pete Thanks, I thought it did have some effect but I guess I could just be imagining it
@Motolab, I have seen that kit, and its on my list of things to buy, right after IID Tool and android Head UnitPre-Production
D3 V8 #264
LHD '04 HSE
Living its life as a 50/50 On/Off road car exploring the Canary Islands
27th Nov 2020 8:54 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8123
You won’t need it as you can easily adjust the ride height to your satisfaction with the Iid tool, I run mine 25mm below normal It can when others can't,
It will when others won't,
It goes where others don't.
When you raise the suspension, you add air pressure to the springs which causes them to lift up. More air pressure makes a harder ride. If you are under normal suspension height, it should provide the most compliance.
Terrain Response does change the way the valve blocks are operated, but only when going into Mud/Ruts and Rock Crawl, this cross links the valves so that when one wheel lifts up, the other is pushed down. This is only in certain conditions and will make your drive on washboard roads just as bad.
The other thing to check is tyre pressures and suspension bushes. If you lower the pressure slightly in the tyres you'll get more compliance in the sidewalls but it will risk damage to the side walls on sharp rocks.1972 Range Rover Classic 2 door V8
2013 Land Rover Discovery 4 HSE - SCRAPPED
2016 Land Rover Discovery 4 Landmark
2022 Volvo XC40 T5 PHEV 282HP FWD 3 cylinder!
27th Nov 2020 9:03 pm
Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
I have a Matzker, was allready fitted when i bought it... Matzker is very expensive AND very basic..
Permanent high or permanent low..
I even now am thinking of the italian one... to buy and mount
They use to have different versions, but now only one.. with 6 or 7 height settings, AND the possibility to combine settings they say..
So a variation of 125mm is obtainable! When needed.. 8)
And i like the better steering behavior on twisty’s in low settings... so much better feeling..
Change the place of the android and this unit on your list... really... you will love it..Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
27th Nov 2020 9:10 pm
Kenny57
Member Since: 12 Apr 2020
Location: Essex
Posts: 169
TigerRecovery wrote:
When you raise the suspension, you add air pressure to the springs which causes them to lift up. More air pressure makes a harder ride. If you are under normal suspension height, it should provide the most compliance.
I would agree more air is added, but does the pressure increase? I would have thought the pressure (times the area of the rams) simply matches the weight of the car, i.e. adding or subtracting air just raises or lowers the car but doesn't change the pressure. But then my thinking isn't always what it should be
27th Nov 2020 11:35 pm
Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
TigerRecovery wrote:
When you raise the suspension, you add air pressure to the springs which causes them to lift up..
Sorry, not completely true... imho
It is basically only more volume
And more volume can be more easily pressed together, gives a smoother ride...
Again, i tested it only on more bumpy roads. Do not now the effect on washboards...Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
28th Nov 2020 12:22 am
D1SCD
Member Since: 13 Feb 2013
Location: North Yorkshire
Posts: 408
I thought the pressure remained the same, just the volume changed.
But I have been known to be wrong...
28th Nov 2020 12:26 am
Kelvo
Member Since: 07 Aug 2015
Location: Perth WA
Posts: 264
Suspension settings won’t help, plus over 50(?)Kph the suspension drops to normal height anyway. Corrugations are common here for hundreds of Km, dropping the tyre pressures slightly help, as does the speed you travel over them. Too slow and you feel every bump too fast and you’ll loose control, but that sweet spot in the middle you will be skipping along the top of them.MY14 TDV6
28th Nov 2020 2:05 am
RichardK
Member Since: 18 Jan 2006
Location: Western Australia
Posts: 295
As Kelvo says, in Australia we lower tyre pressures if going to be on corrugated roads for more than a short time, I travel throughout deserts and remote places in OZ, tyre pressures are generally in the vicinity of 22Psi but that may alter depending on the corrugations. Speed is also a factor, lower your speed to suit conditions and treat the car with respect, remembering it has to get you home!
Cheers
RichardK2009 Discovery S 3, BAS tune, EGR Delete, ARB winch bar, Milemarker hyd winch, HF and UHF radios, Rear spare wheel carrier, Roof rack,
Touring: Australian Offroad Matrix IV Camper
28th Nov 2020 2:23 am
garrycol
Member Since: 06 Dec 2010
Location: Canberra
Posts: 1115
As Kelvo said - there are no suspension settings that help - height is not normally an issue with corrugations.
So tyre pressures, speed and shock dampening are important.
28th Nov 2020 2:50 am
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4686
Motolab wrote:
TigerRecovery wrote:
When you raise the suspension, you add air pressure to the springs which causes them to lift up..
Sorry, not completely true... imho
It is basically only more volume
And more volume can be more easily pressed together, gives a smoother ride...
Again, i tested it only on more bumpy roads. Do not now the effect on washboards...
When the pressure increases the volume decreases and vice versa! Lowering the suspension via GAP IID reduces the pressure but increases volume, and as M3DPO and TigerRecovery suggest should therefore result in a softer ride yµ (idµ - eAµ) ψ=mψ
28th Nov 2020 4:26 am
Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1820
You are referring at Boyle’s law...
But that law states also “ when mass (and temperature, for the record) are held constant.”
And
Since we are talking about a balloon (bellows air spring) and we add air (or the opposite) so different mass in different hight setting, the dampening will be different..
I experience Mine softer when higher...Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
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