Moving the distributor only affects the time in which the spark plug fires. It doesn’t affect whether or not your piston comes up to TDC with the valves completely open. That would be the task of your timing chain being offset on the sprocket.
Moving the distributor only affects the time in which the spark plug fires. It doesn’t affect whether or not your piston comes up to TDC with the valves completely open. That would be the task of your timing chain being offset on the sprocket.