Member Since: 19 Apr 2012
Location: Melbourne, Victoria
Posts: 85
EAS - lowest safe running height
Okay, I have my IID Tool and I want to set the suspension lower for town and highway driving.
What's the lowest I can safely/sensibly set the suspension to?
In the IID manual it says "The front can be lowered by a maximum of 200 - 150 = 50 mm."
and "The rear can be lowered by a maximum of 183 - 150 = 33 mm."
Do these figures take into consideration that the height can be lowered further to access level, or does lowering it by these figure preclude the use of access level?
17th Jan 2013 9:00 am
SteveMfr Site Sponsor
Member Since: 11 Jan 2011
Location: Strasbourg
Posts: 200
Yes, it generally precludes the use of access level. All 4 height settings are reduced or increased by the same amount so using access when lowered this far will cause you to hit the bump stops. The EAS ECU interprets this as being bottomed out and goes to super extended mode - so you end up at the very opposite end of the spectrum to where you wanted to be. www.gap-diagnostic.com
17th Jan 2013 9:42 am
nivekau
Member Since: 19 Apr 2012
Location: Melbourne, Victoria
Posts: 85
Thanks Steve.
If the car is lowered to that level is there any chance that it will still hit the bump stops when driving along, say if a wheel hit a hole in the road?
17th Jan 2013 9:59 am
SteveMfr Site Sponsor
Member Since: 11 Jan 2011
Location: Strasbourg
Posts: 200
Once again - generally.
Generally no. And just bottoming on a bump stop on one wheel will not cause the EAS to go into extended mode. It has to think that the car is unable to drop to its target height - as when your access height is set to below bump stop level.
Member Since: 17 Apr 2012
Location: London
Posts: 425
I have the whole car set to 20mm lower all round, and it's simply superb. It really transforms the driving of the car - it handles so much better.
With the 20mm lowering, the car still happily goes down to access height, and I've driven in access height no problem. However this has mostly been in car parks, on level flat surfaces, so not sure how you'd do on say a bumpy road in access height!
19th Jan 2013 9:33 pm
caverD3
Member Since: 03 Jul 2006
Location: Oberon, NSW
Posts: 6922
20mm is about the right amount. If you go too low it becomes very uncomfortable.“There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely gamesâ€
Ernest Hemmingway
D4 3.0 Active Diff, Adaptive Lights, High Beam Assist, Surround Cameras, Privacy Glass.
D3 2.7:Adaptive Headlights,Electronic Rear Diff,ARB Bar,Blaupunkt Speakers,JVC Powered Subwoofer,Removable Snorkel,Mitch Hitch,Pioneer After Market Head Unit,Steering Wheel Control Adaptor,Remote Adjustable Supension Rod System, Taxside Dual Battery System.
19th Jan 2013 10:25 pm
Wildrover
Member Since: 19 Jul 2005
Location: Walkabout
Posts: 628
Just added +15 as running 285/50/20s and I get occasional rubbing on Ireland's bumpy roads in normal height
My question when checking the height in all modes after adjustment is,
shouldn't it be a consistent +15mm at all 3 settings
In access +19mm
Normal +15mm
Extended +40mm
Measured at near side rear from same point on wheel (not centre) so disregard value except for differences
Start mysettings1
40.6 low 42.5
46. Mid 47.6
50.5 high 54.5
Am I missing something?
Thanks2007 D3 HSE Artic Frost Silverish
Wandering Aussie-Looking for SUN
Growing Old is Mandatory, Growing Up is Optional.
9th Feb 2014 8:16 pm
PatGAPInnov Site Sponsor
Member Since: 02 Dec 2011
Location: Montreal
Posts: 745
Hi Guys
shouldn't it be a consistent +15mm at all 3 settings Not quite, the height sensors position vs voltage output is not linear over the entire range, this explains why a X mm increase in the ECU will not be equal to X mm at the wheel in all modes. Also, if you increase or decrease the standard height significantly, the actual height change at the wheel will be a bit higher for the same reason.
Member Since: 14 Oct 2005
Location: Somerset
Posts: 1145
With any change in height the camber and tracking values change quite a bit.
So it would be worth re-checking the tracking at least after a height alteration.
Put it in access mode and have a look at how much the rear wheels tip in at the top!
Regards
Steve
10th Feb 2014 7:38 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8156
caverD3 wrote:
20mm is about the right amount. If you go too low it becomes very uncomfortable.
It can when others can't,
It will when others won't,
It goes where others don't.
10th Feb 2014 7:56 pm
D4JWW
Member Since: 20 Oct 2009
Location: London, UK
Posts: 1318
I had my D3 on 4wheel alignment rig at normal height and then lowering it by 20mm with IIDTOOL and all was within spec no need to adjust! Did not have enough time to check affect of raising to max calibration, very easy to set tight tolerance with IIDTOOL as required for best result on wheel alignment dayA few mods... and keeping it all running...Faultmate MSV2
MY09EGR's blanked Thanks Bellautos, BAS
10th Feb 2014 9:46 pm
caverD3
Member Since: 03 Jul 2006
Location: Oberon, NSW
Posts: 6922
The height you are running has a surprisingly small affect on the suspension and steering geometry.
Very clever design by LR to cope with differing ride heights.“There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely gamesâ€
Ernest Hemmingway
D4 3.0 Active Diff, Adaptive Lights, High Beam Assist, Surround Cameras, Privacy Glass.
D3 2.7:Adaptive Headlights,Electronic Rear Diff,ARB Bar,Blaupunkt Speakers,JVC Powered Subwoofer,Removable Snorkel,Mitch Hitch,Pioneer After Market Head Unit,Steering Wheel Control Adaptor,Remote Adjustable Supension Rod System, Taxside Dual Battery System.
I'm not too sure about the running height. I do a lot of highway driving, and had set my IIDTool for the lowest I could go without running into the bumpstops when going into access mode.
I noticed a very pronounced wear on the inner edges of my tires which I would say was from the negative camber of running at a lower ride height. Mind you the suspension programming already will lower after a certain high speed. Maybe the combination is too much for the tires.
Keep in mind, that this was an extremely scientific observation, based on a sample set of 1, with no baseline tests, or alignment done beforehand. It's just what I saw, and could have been a poor alignment done, which I'd understand from the Land Rover dealer near me.
11th Feb 2014 3:46 am
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8156
D4JWW wrote:
.......................... very easy to set tight tolerance with IIDTOOL as required for best result on wheel alignment day
But not quite so easy to take it out of TTM, took me about 2 hours and thought I had cocked it up until I realised I was pressing the wrong up/down switch, I have only done it once and thought it was an email to gap support, I'm still not quite sure of the exact procedure but I did manage to get it back to normal mode.
I had my wheels aligned after lowering 20mm and new RRS lower bushes and rod end ball joints fitted, the suspension, handling and steering response is totally transformed It can when others can't,
It will when others won't,
It goes where others don't.
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and I want to set the suspension lower for town and highway driving.
until I realised I was pressing the wrong up/down switch, I have only done it once and thought it was an email to gap support, I'm still not quite sure of the exact procedure but I did manage to get it back to normal mode.
