A speed sensing system for a rotational component having a plurality of teeth arranged in a circumferentially uniform pattern about the rotational component comprising: a rotational component having: a plurality of teeth arranged in a circumferentially uniform pattern about the rotational component; and an indexing feature; a first speed sensor located in a first one of three or more predetermined possible locations adjacent to an outer circumference of the rotational component and configured to detect the presence of the indexing feature at a first circumferential location; a second speed sensor located in a second one of the three or more predetermined possible locations adjacent to the outer circumference of the rotational component and configured to detect the presence of the indexing feature at a second circumferential location; and an engine control system electrically connected to receive data regarding the presence of the indexing feature from the first speed sensor and the second speed sensor, wherein the engine control system determines the first and second locations of the first and second speed sensors (S1,S2) based on the received data and a table of the predetermined possible sensor locations relative to one another, wherein the angular spacing of any pair of possible speed sensor mounting positions has a known unique value. a rotational component having: a plurality of teeth arranged in a circumferentially uniform pattern about the rotational component; and an indexing feature; a first speed sensor located in a first one of three or more predetermined possible locations adjacent to an outer circumference of the rotational component and configured to detect the presence of the indexing feature at a first circumferential location; a second speed sensor located in a second one of the three or more predetermined possible locations adjacent to the outer circumference of the rotational component and configured to detect the presence of the indexing feature at a second circumferential location; and an engine control system electrically connected to receive data regarding the presence of the indexing feature from the first speed sensor and the second speed sensor, wherein the engine control system determines the first and second locations of the first and second speed sensors (S1,S2) based on the received data and a table of the predetermined possible sensor locations relative to one another, wherein the angular spacing of any pair of possible speed sensor mounting positions has a known unique value. a plurality of teeth arranged in a circumferentially uniform pattern about the rotational component; and an indexing feature; a first speed sensor located in a first one of three or more predetermined possible locations adjacent to an outer circumference of the rotational component and configured to detect the presence of the indexing feature at a first circumferential location; a second speed sensor located in a second one of the three or more predetermined possible locations adjacent to the outer circumference of the rotational component and configured to detect the presence of the indexing feature at a second circumferential location; and an engine control system electrically connected to receive data regarding the presence of the indexing feature from the first speed sensor and the second speed sensor, wherein the engine control system determines the first and second locations of the first and second speed sensors (S1,S2) based on the received data and a table of the predetermined possible sensor locations relative to one another, wherein the angular spacing of any pair of possible speed sensor mounting positions has a known unique value.