I know it isn't excatly law abiding and maybe fighter bomber owners will have more experience of it than the TDv6 brigade but how many know that there is a 4th suspension setting other than Normal, Access and Offroad?
Must admit I didn't until I read this post over on Range Rover Net............ and it explains Speedinovation's post about the ECU for suspension settings.
http://www.rangerovers.net/forum/viewtopic.php?t=8685

The FFRR used to lower at about 62mph to "improve" the stabilty at speed it was noticable only because the FFRR has a display panel,switch and LEDs that flash as the car raises or lowers except that you cannot select highway height using the switch, it goes there automatically.

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You actually have five settings, as well as lowering at speed.
When of road and grounded you can raise the car again to its full limit, but the car must be grounded to perform the lift. Its out there somewhere. Second V10 Treg on the drive at the moment.

In standard form, it lowers at 100mph, which is a pointless speed to be altering the suspension. Surely, if it improves stability at 100mph, it must also improve it at say, 60mph ?
I know that JE have been working on a software "fix" to lower the suspension at a somewhat more practical speed. It will, I suspect, be massively cheaper than the insane price quoted by Speedinovation. It may well be an option with the chip upgrade.

Paul

I'm watching this SPACE .....................................................  
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Doesn't lower, compressed suspension = firmer ride?

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Doesn't Mrs ST like a Firm Ride then ?  
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MDP wrote:

Doesn't Mrs ST like a Firm Ride then ?

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Supertrotter wrote:

Doesn't lower, compressed suspension = firmer ride?

I don't want any firmer ride quality please!

PaulB wrote:

Supertrotter wrote:

Doesn't lower, compressed suspension = firmer ride?

I don't want any firmer ride quality please!

The ride shouldn't get any firmer, the system will simply let air out until the required ride height is achieved. That's probably over simplifying it, but you get the idea.

Paul

But doesn't less air = less pneumatic shock absorbing?

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Supertrotter wrote:

PaulB wrote:

Supertrotter wrote:

Doesn't lower, compressed suspension = firmer ride?

I don't want any firmer ride quality please!

The ride shouldn't get any firmer, the system will simply let air out until the required ride height is achieved. That's probably over simplifying it, but you get the idea.

Paul

But doesn't less air = less pneumatic shock absorbing?

Same principle as lower profile tyres = less air for bump absoption!

No
Lower profile tyres are firmer because of the shallower sidewalls and not because of the amount of air inside them, assuming the same internal pressure.
The suspension isn't "compressed" to make it lower, which would imply a higher internal pressure thereby resulting in a firmer ride. Less air is pumped into the system, so the internal pressure remains constant.
I hope that clarifies it for you.

Paul

Paul

Ah! I see!

I am only here to monkey around. I tend to shy away from technical contributions for this reason.






















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I've archieved top speed recently on a highway (230 km/h - 140 mph) but still it was "Standart" on the display.. I drove at this speed for some time (about 3 or 5 mins) - no effect. On the big RR you can lock the suspension in highway mode after you archive 100 km/h (62mph).. and i could feel the difference - the car was a bit more sporty then in standart (18sm against 22sm in standart). 2014 Mercedes-Benz S500
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I don't think you would get a visual or acoustic confirmation of "high speed height" displayed on the LCD upon reaching 100 mph, at those speeds I am sure Land Rover decided it was better not to distract the driver with bongs and messages appearing in the instrument clusters...

Also, we are only talking 20 mm... Probably hard to notice with the naked eye, considering you are zooming down a straight without points of reference. Hey, I have a great idea: get a friend to ride his car right next to yours until you reach 100 mph and check your wheel well to see if it shrinks!

In fact, it would be nice if he could take some pictures, so the feature can be documented on this web site.  

umbertob wrote:

I don't think you would get a visual or acoustic confirmation of "high speed height" displayed on the LCD upon reaching 100 mph, at those speeds I am sure Land Rover decided it was better not to distract the driver with bongs and messages appearing in the instrument clusters...

Also, we are only talking 20 mm... Probably hard to notice with the naked eye, considering you are zooming down a straight without points of reference. Hey, I have a great idea: get a friend to ride his car right next to yours until you reach 100 mph and check your wheel well to see if it shrinks!

In fact, it would be nice if he could take some pictures, so the feature can be documented on this web site.

No. A while back there was news of a tuner coming up with a module to enable lower height at lesser speeds, can't remember which one but I think it was either Kahn or Arden... Haven't heard anything since, until Speedinnovation posting a couple of days ago (see Maintenance & Mods.)