What odds do you fold your draws heads up? If you have 1.2/3 odds on the turn for an opened ended, how much implied value would you usually put on top?
Open enders using both your cards have more implied odds than flushes as they are well conceled. There are more implied odds in position as well. If you are playing a really tight/nit player you probably have more implied odds as well since they will show up with a hand more often. Against an aggressive opponent you usually have less implied odds but more fold equity so raising draws is better than chasing.
Typically its not a great idea to add too much for implied odds as most people love to chase and convinced themselves implied odds are good enough. If pot odds are close and you have a good idea he has a big hand then fine, you can add some, but dont start thinking, well if I hit I get his whole stack and therefor plenty of odds.
Small stakes, you don't see too many people folding draws, and I usually don't either unless I have a lot of chips. Short stacked, I almost never fold. Plus as the previous poster said, you have to figure the implied odds before deciding.
It would definatley depend on the player, the pot, the chip stack. I would probably open up and bet my draw. In heads up play I could take down the pot right there. It just depends on the situation.
This is how I would play open enders on the turn heads up. If you are in early position and your opponent is aggressive and most likely to bet/raise I would check call and hope to hit on the river. If your opponent is fairly tight I would bet a good amount. If he folds, thats not such a bad thing because you take the pot without much of a hand. If he calls hope to hit on the river. Whether you hit or not I would bet again on the river. If you are in late position, if he checks you should bet. Pretty much the same thing applies to the earlier position. In a nutshell, be aggressive if hes tight and call and hope to if hes aggressive.