RAC308. Speed Index

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RAC308. SPEED INDEX. Speed index is a system of rating the performance of American Quarter Horse racehorses.

  • RAC308.1 Speed index ratings are based on an average of the three fastest winning electronic times at a particular distance run each year for the immediate past three years at a given track (nine total times). The average of the nine times (to the nearest 1/1000 (.001) of a second) represents a speed index rating of 100 for the following year.
    • RAC308.1.1 In the event a time included within the nine times is slower than the established Minimum Standard Time for that distance, the Minimum Standard Time will be used in lieu of such slower time in calculating the average from which the speed index ratings will be computed the following year.
    • RAC308.1.2 No horse will be used more than one time in any one year at a particular distance at any one track in calculating the nine fastest times.
  • RAC308.2 The following times constitute Minimum Standard Times.
    OFFICIAL DISTANCE MINIMUM STANDARD TIME (for 100 Speed Index Rating)
    110 yards - straightaway 6.98
    220 yards - straightaway 11.95
    250 yards - straightaway 13.35
    300 yards - straightaway 15.55
    330 yards - straightaway 16.95
    350 yards - straightaway 17.85
    400 yards - straightaway 20.15
    440 yards - straightaway 22.05
    550 yards - straightaway 27.70
    660 yards - straightaway 33.50
    660 yards - around one turn 34.60
    770 yards - around one turn 40.36
    870 yards - around one turn 45.60
    1,000 yards - around one turn 52.41
  • RAC308.3 In the event a track does not have a three-year immediate history for a particular distance, but, at least once in the immediate past three years has recorded three fastest winning electronic times at a particular distance, then the speed index of 100 will be based on the average of:
    • RAC308.3.1 the Minimum Standard Time for those year(s) that the track did not run the particular distance; and
    • RAC308.3.2 average of the three fastest winning electronic times in each of the years that the race was run in the immediate past three years (average of 3 times if distance only run during 1 meet in the last 3 years or average of 6 times if distance run during 2 meets in the last 3 years)
  • RAC308.4 In the event a track has not recorded three fastest winning electric times at a particular distance at least once in the immediate past three years, but is a track that has run races that AQHA has recognized in the past, then the speed index of 100 will correspond to the Minimum Standard Time for that particular distance.
  • RAC308.5 Horses starting at tracks eligible for recognition by AQHA for the first time will receive a speed index rating based on the following:
    • RAC308.5.1 First year: A speed index of 100 will be based on an average of the three fastest winning electronic times at a particular distance run for the previous year at each of the five tracks with the largest number of race starters the previous year (hereinafter referred to as the “Five Track Average”). No horse will be used more than one time in any one year at a particular distance at any one track.
    • RAC308.5.2 Second year: A speed index of 100 will be based on an average of the Five Track Average and the average of three fastest times at the track in question for the previous year. No horse will be counted more than once at a particular distance at any one track.
    • RAC308.5.3 Third year: A speed index of 100 will be based on an average of the Five Track Average and the average of the three fastest times at the track in question for the previous two years. No horse will be counted more than once at a particular distance at any one track.
  • RAC308.6 A speed index point varies according to the distance of the race as follows:

100 equals one speed index point at 1,000 yards.
.087 equals one speed index point at 870 yards.
.077 equals one speed index point at 770 yards.
.066 equals one speed index point at 660 yards.
.055 equals one speed index point at 550 yards.
.044 equals one speed index point at 440 yards.
.04 equals one speed index point at 400 yards.
.035 equals one speed index point at 350 yards.
.033 equals one speed index point at 330 yards.
.03 equals one speed index point at 300 yards.
.025 equals one speed index point at 250 yards.
.022 equals one speed index point at 220 yards.
.011 equals one speed index point at 110 yards.

  • RAC308.7 To calculate a specific speed index for a specific horse in a specific race, the time run by the horse is compared to the speed index time associated with 100 for the distance in question at that particular track. Points are added or subtracted based on whether the time was faster or slower than 100 speed index time. The only exception to the point interval chart above relates to a horse achieving a speed index of 101. In order to achieve a speed index of 101, a horse need only be .01 faster than the speed index time associated with 100. Thereafter, speed indexes greater than 101 are calculated using the speed index point intervals above. By way of example, if a 100 speed index associated with a 350 yard race is 17.75, then a horse that runs a 17.74 shall earn a speed index of 101. Using the same example, if the horse runs a 17.705 (.035 faster than 17.74), then such horse shall earn a speed index of 102.
  • RAC308.8 An American Quarter Horse may not earn a speed index at a distance exceeding 1,000 yards or around more than one turn. However, such races will be listed on the participating horse’s race record.
  • RAC308.9 A speed index will only be awarded to a horse for approved electronic times at AQHA recognized official distances.