Eight Four Suited vs Queen Five Offsuit

At the flop:
Winning 28.67% of the time
Tied 0% of the time
Losing 71.33% of the time

At the Turn:
Winning 35.71% of the time
Tied 0% of the time
Losing 64.29% of the time

At the River:
Winning 40.91% of the time(16.05% with trips or better)
Tied 0.86% of the time
Losing 58.23% of the time(2.47% with trips or better)