Crane 99619-1 Vacuum Timing Limiter Plate

The Crane Vacuum Timing Limiter plate changes the amount of vacuum timing. This is especially helpful with applications such as high compression ratio engines, heavy engine loads (such as very low numerical rear axle gearing) or heavy vehicle weights such as motor homes, trucks with trailers, etc. Each plate notch will shorten the amount of vacuum timing by 2 degrees. It will also advance the initial timing to 2 degrees because of the change in the starting position of the breaker plate or magnetic pick up.