100-150' straight! I start with a FDR of 6.162 and my
Rollout is around 31.59. We have a 150' straight and open track. We run 1/8's so it is never tight. The other track I set up is tighter and smaller, about a 100' straight, and I start out with a FDR of 7.
I now count 6 XRAY's at my local track.