With or without ACE

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TAH

Active Member
Posts
184
Location
Hants
Hello - Just got a 2005 RR Sport L320 - and wanted to change the Drop links for starters as the handling is .. poor.. over bumps. - But when looking around there seem to be a lot to choose from , predominantly if I have ACE or not. How do I know, not being a previous RR L320 owner? Thanks
 
What engine and year? I believe the TDV8 and supercharged V8 come with the Dynamic Handling as standard (aka ACE). But I understand it was optional on other models/engines.
 
Or shot shocks?
What behavior does it present when going over the speed bumps?
Over a larger bump.. seems normal.. but I think it's not damping enough. I assume there are dampers in the struts somewhere ? Imagine driving over the ripples you get in a road on hot days (or generally in UK roads as they are so ****e) - it's like it rebounds too much and doesn't soak up the bumps. Even over one of those joints in say a motorway or bridge - it'll 'skip' a little bit - I am sure it's a combo of ball joints maybe ARB Bushes/links but NO knocking. just vibration over bumps.
 
Over a larger bump.. seems normal.. but I think it's not damping enough. I assume there are dampers in the struts somewhere ? Imagine driving over the ripples you get in a road on hot days (or generally in UK roads as they are so ****e) - it's like it rebounds too much and doesn't soak up the bumps. Even over one of those joints in say a motorway or bridge - it'll 'skip' a little bit - I am sure it's a combo of ball joints maybe ARB Bushes/links but NO knocking. just vibration over bumps.
These have a strut combo with the airbag and shock all in one. You can by service kits for the airbag side but if the shocks are tired normally it's a net strut assembly.
When you dab the brakes does the front end go down excessively?
 
At low speed and over small bumps if the drop links or anti roll bar bushes have gone it'll make clunk noises. The anti roll bar drop links or ace system don't dampen the suspension travel just keep it from leaning too much through corners.
 
These have a strut combo with the airbag and shock all in one. You can by service kits for the airbag side but if the shocks are tired normally it's a net strut assembly.
When you dab the brakes does the front end go down excessively?
Nope.. Air side of things seems to work normally. Its going into my local Indy soon, just trying to find some clues so he doesn't go off on a tangent and replace the front end as not used him before :L-)
 
At low speed and over small bumps if the drop links or anti roll bar bushes have gone it'll make clunk noises. The anti roll bar drop links or ace system don't dampen the suspension travel just keep it from leaning too much through corners.
No knocks. Just try to skip over a bit over striations in the road.
 
Nope.. Air side of things seems to work normally. Its going into my local Indy soon, just trying to find some clues so he doesn't go off on a tangent and replace the front end as not used him before :L-)
Understood, the service kit for the air-bags was just for your info but if the shocks are shot then it's new assembly.
 
Plus 1 ^^^

would also check the suspension is calibrated correctly along with tyre pressures

also are the tyres low profile, ie 20” etc

indeed would check ur struts, ARB bushes , drop links or wishbones as these are heavy vehicles

hope that also helps and plse let us know how u get on
 
The sc and tdv8 has it some 3.6 if Specked
Bless u mate , think the confusion was where I’d seen some web sites would include the 2.7 having it

also as a side see that front wing outrigger that isn’t used on the D3 but is on the RRS

see that some later RRS also had an extra terrain setting , if I read it right it was only post 2010 where they moved away from the dynamic anti roll bars to having electronic sensors inside the struts where this setting would stiffen the suspension up

find it mind boggling with so many different options , lol

hope ur good mate

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Bless u mate , think the confusion was where I’d seen some web sites would include the 2.7 having it

also as a side see that front wing outrigger that isn’t used on the D3 but is on the RRS

see that some later RRS also had an extra terrain setting , if I read it right it was only post 2010 where they moved away from the dynamic anti roll bars to having electronic sensors inside the struts where this setting would stiffen the suspension up

find it mind boggling with so many different options , lol

hope ur good mate

View attachment 299317
I think that is something else. Did those models not have ACE as well? Stiffer shocks might reduce lean, but would be more about damping feel. ACE didn't make the ride harder, it just prevented it leaning.
 
I think that is something else. Did those models not have ACE as well? Stiffer shocks might reduce lean, but would be more about damping feel. ACE didn't make the ride harder, it just prevented it leaning.

hi mate

managed to find it from the workshop manual

I think that extra terrian setting was for later models where they done away with the dynamic anti roll bar system and into the struts themselves , where using that setting would indeed reduce the body roll of the vehicle by firming it up

hope Ive got that correct , famous last words, lol

from the workshop manual


The Dynamic Response system is electrically and hydraulically operated. Electrical and hydraulic operation is controlled by the Dynamic Response control module which is located on the driver's side 'A' post, behind the instrument panel.


The Dynamic Response system comprises front and rear stabilizer bars with integral actuators, two accelerometers, a control module, a hydraulic pump, a valve block and a fluid reservoir.


The Dynamic Response system prevents body roll with cornering forces of up to 0.4 g. From 0.4 g there is a progressive increase in body roll but significantly lower than on a 'passive' system. A 'passive' system will have a progressive increase in body roll angle as soon as cornering forces are applied and will have a greater roll angle than the Dynamic Response system for the same cornering force.


The Dynamic Response system can also detect when the vehicle is driven off-road. If off-road conditions are detected and the vehicle is travelling at 25 mph (40 km/h) or less, the control module will reduce roll compensation. On side slopes of more than 11 degrees the Dynamic Response system will switch to a 'locked bars' condition at slow speed.


Lateral acceleration of the body is sensed by two accelerometers and signals from these are transmitted to the control module. The engine driven hydraulic pump supplies a constant hydraulic flow to the valve block. Two directional contro valves are solenoid operated by the control module and supply hydraulic pressure to the applicable side of each actuator to apply a force equal to and opposite to the force applied to the stabilizer bar. In operation the Dynamic Response system maintains the attitude of the vehicle body when cornering.
 
Plus found the other section where it mentions that extra terrian setting and struts replacing the dynamic anti roll bar system

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