Thank you for all this info. I understand what you are saying , I guess I should re-phrase my question. How are people who are adding 2" of lift via suspension and not body lift maintaining or increasing articulation and flex?
From what you are saying it sounds like you are of the opinion i would be better off doing body lift and staying with stock spec springs/shocks. Is that accurate or am I misunderstanding your message?
I have witnessed some of my friends' rovers first hand with great articulation and ability get power to the ground using relocation cones so I have been of the opinion they could make sense at times. I am not arguing; only explaining why I had considered that.
Thanks for your help
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As I thought I explained, a suspension lift cannot increase or maintain your articulation. It is not physically possible.
But if you are asking whether putting in heavier springs will improve your articulation, the answer depends on how much extra weight you have in the vehicle. For example, with a steel bullbar, winch, and dual batteries, I had a lot of extra weight in the front. I put in springs that many here would class as a 3 inch lift, but it only raised the suspension height around 1 inch from standard. That is, the extra strength of the springs were mainly needed to bring the thing back up to standard height. So standard for a Rangie Classic is 133lb inch springs. If I used 170 lb springs, in theory it is a 2 inch lift. But if I added 264lb to the front (132lb per wheel), it would only have raised the front 1 inch over standard.
I actually run Land Rover red springs in the front which are 180lb per inch springs and are 1.1inches longer than standard and only ended up having a suspension height around 1 inch higher than standard. In theory those springs would have lifted a standard vehicle over 3 inches, but the extra weight reduced the increase to 1 inch. Many people here would say I have a 3 inch spring lift, but in reality it is only 1 inch. And yes it has improved my articulation as I have roughly 3 inches in upward movement and 3 inches downward from its sitting position. But such a lift does not allow any bigger tyres than a standard vehicle because when I am at the top of my articulation I am just hitting the bump stops, which is exactly the same point as standard suspension will reach.
I bet those guys that you saw with dislocation cones had diff locks as well. That is, they were only getting drive from the compressed tyre, not the one dislocated.
I am not at all saying that you should stay with stock springs. All I am saying is that the only way a spring can allow bigger tyres to be fitted is by restricting upward movement of the wheel. Which in turn reduces articulation. 31 inch tyres are fine without a body lift. 32 inch will fit if you do not do serious stuff off-road. If you want full use of the suspension and are not running 32 inch tyres that are wider than 235mm, a 2 inch body lift is useful. If you are running larger than 32 inch, you need to start cutting your guards.