My understand was that my lowering or raising the entire link evenly still changed the roll. For instance on the SC10 4x4, they raised the entire link 8mm. What were the results? For me, it greatly lowered your chance of a traction roll. I went back and forth and the +8mm inside and out definitely lower my chance of traction rolling. So I thought i understood its purpose. But then, on the b4 we lower the entire link and it seems to have a similar effect. The rear slides more and would reduce traction rolls on higher bite tracks. So I wont lie, I am kinda lost. When I looked at the diagrams of the roll cenets lines coming off the links, I can see how changing the height of the rod would change the roll centers. I was reading the JQ tuning guide and this is a quote. It has nothing to do with the b4 fyi.

"The rear link I find, is more critical to get right than the front. When trying different rear link locations, and you get it spot on, it feels like the car does everything better. The rear link will mainly determine the amount of traction the car has, and how it slides when cornering.

Lowering the link on the tower, will give the car more steering, as the rear will start sliding more in corners as you turn. It will also square up better when accelerating out of corners. Raising the link on the tower will add traction and reduce steering.

Lowering the complete link gives more traction, but the car seems to maintain more steering, than when lengthening the link.

In general, a long rear link makes the car more stable, have less steering, and be more predictable and easy to drive. A short link gives more steering, and initially the car can feel like it has more traction, but it will lose traction suddenly, instead of a predictable way.

Again, the further in the link is on the tower, the more stable and consistent the car feels, the further out it is, the more non-liner and and inconsistent it feels. The car will roll less and have less overall traction.

A longer link on the hub or tower will give more traction, and less steering, the car will be more stable. A shorter link will give more steering, specially into and mid corner, and the car will square up and accelerate straight better."