You can't pin point I/C unless you know the exact C.G point . Otherwise it's only a guess. You can get a pretty good idea if you video the car. If if separates you are above the C.G.. If it squats (very unlikely with ladder bars) it's below the C.G. The more power you run. The lower you mount the front of the bar. Weight distribution, ride height, wheelbase, power level, SLR, tire type, track prep style all play into it. Need more info.
Doug