think about it ..........we have two scenarios with two different outcomes....

scenario 1:

the lca mounting point on the body is higher than the lca mounting point on the rear end........
result:
when the car launches the rear end is trying to push itself forward in the body of the car with this downward angle on the lca it is forcing the body up and because of gravity holding the body down it is intern pushing the rear end into the ground aiding in traction.......

scenario 2:

the lca mounting point on the body is lower than the mounting point on the rear end.....
result:
when the car launches and the rear end is trying to push foward the lca pivot point is now pushing down on the body of the car instead of up.....intern pushing the rear end UP into the body giving that "squat" that everybody thinks is so great.....thusly removing weight from the rear end and creating a nice smoke show but no traction.........


common misconception is that a solid alxe car that "squats" is hooking hard......this couldn't be any more invalid.......a properly set up car's rear fender well gap will actually grow on launch because the rear end is forcing itself down into the ground intern pushing the body of the car up.....

hope that clears it up!!!! :D

Mike

Good kinetic force/motion analysis from and engineering standpoint mike!