If more than half the deck can hurt you on the turn, your hand is way too volatile for putting like 1/3rd of your stack while it's strong and playing guessing games next street for the rest of your stack. If you can move in while being a favorite on the flop, fine, otherwise you need to consider the *future* value of your hand, and not only what it's worth now. That's one of the big traps of the game.
Just my 2 cents,

FRC