Hi Wes,

I don't rate races on heavy tracks or distances over 1800m. Here's what I use. Figures below are seconds, not lengths.

Dist	D	S
1000	0.85	1.6
1050	0.925	1.7
1100	1	1.8
1150	1.05	1.88
1200	1.1	1.95
1250	1.175	2.02
1300	1.25	2.1
1350	1.325	2.175
1400	1.4	2.25
1450	1.475	2.32
1500	1.5	2.4
1550	1.575	2.49
1600	1.65	2.58
1650	1.7	2.65
1700	1.75	2.72
1750	1.825	2.81
1800	1.9	2.9