Eight Four Suited vs King Queen Offsuit

At the flop:
Winning 27.21% of the time
Tied 0% of the time
Losing 72.79% of the time

At the Turn:
Winning 34% of the time
Tied 0% of the time
Losing 66% of the time

At the River:
Winning 38.87% of the time(15.98% with trips or better)
Tied 0.7% of the time
Losing 60.43% of the time(3.18% with trips or better)