[jt1]

I think you need 5-1 to see a flush draw + the implied odds of all those extra bets you'll get after hitting - the reverse implied of drawing and not hitting.

If you're at a passive table then the reverse implied odds are only 1.5 sb, 2.5 at the most.

if you're at a aggressive table the they can be much higher

If the table is loose then the implied odds go way up.

if the table is tight then the they go way down.