4 to a flush on the flop headsup

how much money has to be in the pot vs the call amount to determine whether or not you call with 4 to a flush, no pair no straight draw (or runner runner) ?

 

whats the % that it hits? do you call with a low flush draw or only with high?

 

someone just sucked out on me in a tourney. they called all in with 3-6 suited after 2 clubs came on the flop. of course jc on the turn and its lights out for me. i had top pair.

 

there was 2k in the pot preflop and they had 2100 in front of them. i put them all in and they called.

without knowing exactly what the cards were it is about 60/40 in your favor on a flop like that.  There are no implied odds because you put him all in.  His EV(expected value) on this hand is .40*4100(his win amount) - .60*2100(his loss amount)=+380 so he is over time making the correct play here.  Your EV was -1620 so obviously you are in a much better position then he.  The danger of playing against short stacks(not sure what the blinds were at here) in tournaments and in cash but more so in tournaments is they are going to get a good price on a draw flop because they may have less then the pot on the flop thus committing them to the pot and making draw hands worthwhile calls.  Keep that in mind when playing against a short stack.  Its better to force them all in pre flop because you can not out play them post flop because they can not fold any hand.  The only time you get fold equity is pre flop so make them push it in pre flop or fold blinds to you.  If he had 4k left that would put him at an EV of 0 and anything more then 4k left an all in puts him in a negative EV situation.

Thats +1620 sorry