Eight Four Suited vs Queen Three Suited

At the flop:
Winning 29.44% of the time
Tied 0% of the time
Losing 70.56% of the time

At the Turn:
Winning 37.03% of the time
Tied 0% of the time
Losing 62.97% of the time

At the River:
Winning 43.16% of the time(16.07% with trips or better)
Tied 0.95% of the time
Losing 55.89% of the time(3% with trips or better)