[JFP in PA]

Originally Posted by casioqv

Also, since the forces are higher on the outside and we we would expect the deflection here to be much greater, in a turn the bottom of the suspension sides will get closer together (compress together), because only the outside suspension has enough force to really move a lot. This suggests that a bar pre-loaded with tension would actually exasperate the suspension flex issue, causing further increased flex!

Only problem is it doesn't seem do that, preloading slightly tight tends to settle the car more; preloading outwards doesn't have the same effect. We have had customers play with these things a lot (give a track rat something adjustable, and they will play with it), and the general consensus is that running the tie bar slightly tight at rest gives you are more settled and predictable corner exit. Granted, a lot of that is seat of the pants, but drivers that feel more confident based upon how the car feels to them tend to be faster.