Hi
D
damien2009 Sorry for the late reply been busy with work.
You dont mention it but i assume you have a lbs per length figure to work with for each distance, this is worked out from the standard time for the distance at each course.
As an example i have 57.99 for the 5 furlongs at Chelmsford and the lbs per Lgth is 200/57.99 = 3.45, if you dont have any of these i can post up my std times and lbs per Lgth figures for you.
Also have you read the other excellent threads that can help you achieve what you need, i can give you a speed template workbook that was created by one of the other forum members to help get started with speed ratings. I only do the AW courses due to the time it takes in producing speed figures and keeping them updated, its not an easy task to undertake especially once the winter season starts and because of my shift paterns i am always playing catch up.
Alot of time is needed to study and read up on everything you can to understand the different ways to approach creating a set of ratings, if you look on the compiling speed figures thread you will find an explination on using 9-0 and a 100 base figure and a video i also think if you are going to just use a MPH figure then you would perhaps need to produce your own set of STD Times if there was enough data to go on.
You could work out the time beaten and multiply this by the Lbs per Lgth then deduct that but you must also consider this that it is not always the fastest horse that wins the race, yes it may have a good average MPH but just remember that the jockey and trainer also influence how horse A runs, the going allowance which is how much the surface has slowed or helped speed up the horse whether the jockey is holding up the horse and saving it for the last couple of furlongs ?.
I do have each horses average MPH to look back on in my database and this can sometimes show me if it has a chance or not and by looking at this it has shown me that horse A has run say 4 races over this particular CD and has shown a good MPH average yet it did not get placed in 3 of those races but won 1 at a slower speed.
So even though it can run a faster race that speed is not suitable for it because it has run its best before those final couple of furlongs and so to me says it would be more suited to running in slower run races if that makes sense.
At the end of the day you will need to put in alot of time and effort in to create your own unique set of figures that will just help you to reduce the field, most of my winners come from the top 3 rated but i do have runs of a few days to a couple of weeks where the winner comes from the bottom half of my figures for one reason or another.
In the end speed ratings are just a tool to help you analyze a race and hopefully help point you in the right direction, a little return for alot of time consuming work which can be satisfying when you get it right and make you think why do i bother when you dont.
Hope this has helped you and if you have any more questions then just ask and i will help you if i can, read the other threads in this section and also the
Early days it could help answer alot of your questions or give you food for thought anyway.
cheers
SteveT