The fully balanced valve turns on a bushing & a ball bearing, which takes any thrust load. Notice the oil groove in the face of the back end for additional lubrication. The ball bearing & the bushing are also lubricated from an oil hole in the intact tract. A new valve is being built that has a total opening of 137 deg. It opens 24 deg ABDC & close 63 deg ATDC with the window in the case still at 82 deg. This gives a total duration of 219 deg with a total wide open duration of 55 deg. FOUR VERY IMPORTANT FEATURES; AN UN-OBSTRUCTED WINDOW OPENING FOR AT LEAST 45 DEG OF ROTATION; MAXIUM CRANKCASE PACKING; AN EXCELLENT TIME AREA NUMBER BECAUSE THE VALVES WINDOW IS LOCATED ON ITS CIRCUMFERENCE & VERY LOW DRAG; ENABLE THIS VALVE TO GIVE LARGE HP INCREASES, ON ANY SIZE ENGINE. There is a leading tether car, boat racer from California who has tested this valve with the same results.
