Well oral Winny usually kicks-in by the end of the 2nd week. I have done Winny only cycles for the majority of my steroid use and find this time frame to be consistent. Strength and muscle hardness comes on about the same time.
On a side note I recently tried oral Turinabol and was amazed at how fast it kicked-in, 3 days. I will say that for strength Winny is better, however for size and muscle fullness not bloat, oral Turinabol wins.