Disco TD5 Caster Corrected Radius Arms

[thermidorthelobster]

I see QT are now doing caster corrected radius arms for the Disco II.

Has anybody fitted these?  Notice much difference?

I have a 1.6" lift (OME 779s on the front, air bag spacers on the rear) and I do find the steering is somewhat vague.  New radius arms are one option, but an expensive option at that, so I don't want to fit them if they won't make a difference.  (It could also be that my bushes are getting a little worn.)

I spoke to Tim at Devon 4x4 and he said they don't run any of their modded Discos on caster corrected arms, so I'm wondering if it makes much difference on a TD5.

[Range Rover Blues]

Check the specs to see what castor a TD5 should run with.  The arms are roughly the same length so a 2" lift will 'steal' 3 degrees of castor.  If that leaves youwith some castor it might explain why D44 feel they don't need them.  Also the TD5 has the fancy Cardan joint already, so you would only need the arms.

On the back, did you need to extend the bunp stops too? what happens when the asystem fully deflates without them?

[thermidorthelobster]

Check the specs to see what castor a TD5 should run with.  The arms are roughly the same length so a 2" lift will 'steal' 3 degrees of castor.  If that leaves youwith some castor it might explain why D44 feel they don't need them.  Also the TD5 has the fancy Cardan joint already, so you would only need the arms.

I'll check the workshop manuals;  OTTOMH it's IRO 3 degrees, like a D1, but I'm not sure why people don't tend to bother with them as much on the TD5.

On the back, did you need to extend the bunp stops too? what happens when the asystem fully deflates without them?

I put spacers under the airbags and also a spacer in the potentiometer setup.  I didn't bother with the bump stops.  I haven't looked to see what's happening when the system's deflated!  I'll take a look next time I depressurise it.  It may be as simple as the bag is all crumpled up.

[thermidorthelobster]

According to RAVE, the castor angle on the TD5 is 3.5 degrees +- 0.5 degrees, unladen.

[Range Rover Blues]

That's a big tolerance, perhaps why you can get away without correcting it.

[thermidorthelobster]

When I originally posted this, it looked like nobody had tried these out yet, but a couple of months on I was wondering if anybody has actually run a set by now?