on average if you lower the front of a car 1 inch it adds 0.75 NEGATIVE camber, if you lower the front 2 inches it adds 1.50 NEGATIVE CAMBER, if you lower the front 3 inches it adds 2.50 NEGATIVE camber.
http://www.spcperformance.com/PROD_DIR/PERF_TECH_DIR/SPCPerf_TECHTIP1.html
just as a...