This data was sent to me today from one of the Lycoming technical folks. An improvement over trying to interpret the graphs in their Operator Manual. I was unable to rotate and save it. It finally dawned on me that FT-Full Throttle! Interestingly, Lycoming stated that operating their engines lean of peak would VOID their warranty! Angier Ames N4ZQ -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html