Center Of Gravity Height - is the geometric center of weight location of the vehicle. The CGH is the point above the ground at which this exists. The lower the CGH, the better the cornering ability of the vehicle. Production vehicles have a CGH from 18 to 25 inches above the ground. When componets are rearranged the total vehicle lowered, the stock cars racer s CGH can be 14.5 to 17 inches.
Every vehicle has a front roll center and rear roll center.
They are independant from each other. The roll center is a theorectical point determined by the pivot point location and angles of the suspension linkages, about which the particulae end of the vehicle rolls. During conrnering, the car will roll about the roll axis. The greater distance between the CGH and the roll axis, the greater the body roll angle with a given lateral acceleration. Spring Rates Spring Rate - is the stiffness of a spring as expressed in pounds per inch.