Originally Posted by chuG
2/3 you will win so dont do three of them before the bubble.
Lol @ this.
as for the original question, many factors effect if you should be calling with the draw. Pot odds
are the main factor, but not the only one.
Also shoving with a flush draw is much more desirable than calling a shove with a flush draw, as your fold equity could make this a profitable play.
For example late in a SNG with 100/200 blinds, you call a 2.5x raise in the BB with A9 spades (SB folds).
your stack is 2,300 and Villian has 3,400.
So its just you and the button, with 1100 in the pot.
Flop comes 10s 7s 3d.
This is an easy shove in this situation. The factors that make this easy are the fact that almost 50% of your original stack is in the pot, and your outs could include the flush draw (~36%, running cards for a straight, and maybe the ace too [another 12%]).
So you have about 50% chance of winning this pot if called, and he may fold up to 25% of the time, due to the fact he'd only have 1100 chips left if he called and lost.
So its many factors like that which effect whether pushing or calling with a FD is a good idea.
I suggest reading Moshmans SNG guide, as its a great book