The Cam angle, or dwell angle is the number of degrees through which the distributor cam rotates while the breaker points are closed. It is directly related to the breaker point gap. Decreasing the breaker point gap will increase the cam angle. If the cam angle is too small, the current will have insufficient time to pass though the primary winding of the ignition coil, and a weaker spark will result. If the cam angle is too great, the breaker points will not open far enough, they will tend to stick together, and misfiring will result. The best method of adjusting breaker points is by means of a dwell meter."