Eight Four Suited vs King Four Offsuit

At the flop:
Winning 16.87% of the time
Tied 0% of the time
Losing 83.13% of the time

At the Turn:
Winning 23.07% of the time
Tied 0.75% of the time
Losing 76.18% of the time

At the River:
Winning 29.46% of the time(12.15% with trips or better)
Tied 3.05% of the time
Losing 67.49% of the time(4.73% with trips or better)