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Originally Posted by bruspeed
I was thinking about it, and while our cars may not suffer from the same extreme lack of rigidity you're examples displayed, we are not curing the problem simply by adding a STB. Think of it this way, Strut toweres are "flimsy" right? so what happens when you just add a bar across the tops of them? You get Two "flimsy" strut towers flexing together, whether it be front or rear, What I'm trying to get at is, unless they are triangulated, they aren't really doing much, and definently not there full potential. The front one needs to be tied to the firewall, the rear one can go to the floor for a third attaching place.
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No doubt that would help...but then, of course, you're giving up even more trunk space, drilling holes in the car, and increasing cost. It may be worth it if your goal is to keep the chassis rigid, but the standard bars work well at preventing the wheels from losing negative camber from the towers flexing as you take a hard turn. This is because the outside wheel has as much as 100% of the latteral force in a corner (RE: lifting a wheel) the inside wheel's strut tower is experiencing little or no latteral force when the wheel is lifted, so you might as well use that structural integrity to supplement that of the "outside" strut tower.