Some valid points raised in the replies, but I think this still skirts the original problem.
No matter how many leaves you use, or how thin - a by-product (so to speak) of soft springs that flex well is body roll.
If you make the spring soft enough to compress when 4 wheeling, you have also made the spring soft enough to compress in many other situations both on & off road.
I have seen quite a few vehicles that could ramp over 1500 on a 20 degree ramp make it no further off road than my Toy that ramps just under 1000.
As a personal rule, I want to get my Toy to ramp just over 1000 on a 20 degree ramp. From what I have seen, anything more is just wasted flex - and usually wasted money in tweaking as well.
I also like to keep one end of the vehicle stiffer and with less flex than the other. What this does is lets me always know how each will react. For example, right now my rear springs do not flex all that well, but the front maxes out my 9012's on droop & compression - and could do more. What the stiffer rear springs do that when on an obstacle I know the truck will basically stay with the action of the rear, more than the front. Knowing this, I can adjust where I place the rear tires to keep the body at the angle I want.
If both front & rear suspenions were as soft & flexy as the front is now, I would always be guessing which end had the least force on it, and which end the body would stay alligned with at that moment.
This may not make sense, but ask anyone with a Hummer and they can agree. The Hummer may not have lots of travel, but the suspension allows the driver to always know how the body will react at any moment - and this is part of why they are difficult to roll.
Hope this helps, or stirs up some other responses[img]/wwwthreads_images/icons/wink.gif[/img]
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