Here is an example
Valm and Val 4 are the same programs But with different scales for speed ratings and uses the intertrack and daily varient which could be different than what was used by the DRF in 2000
Here is a line for a horse running on Saturday from Parx
Val 4 gives line 2 a Speed rating of 84
Valm gives the same line a speed rating of 82
Its not a big difference but we are guessing the track to track adjustments and the DTV when we use today's data
Here is Synthesis This is using the pre 2006 speed ratings
and the same ITV and DTV adjustments as Val 1 and in theory Valm
But Sythesis gives the line a 96
