I dont agree w/ Tstones math.
Here is an example I gave to Tstone in IRC because he asked me about a non-specfic situation where u have a 7outer and the pot is 3:1 to u.(I hadnt read this thread yet...so my example takes place on the flop and u have a 7 outer)
Also my example has Hero being bet into.
OREGOD: say there are 3sbs in the pot to u..u have 7 outs. if none of your outs hit u lose 1sb, if they do u win 1bb (so 2sbs) on average from your opponent later in the hand. (this also doesnt take into account the times your opponent re-improves on u)
So w/ a 7 outer on the flop and u want EV for 1card to come:
Improve on Turn: (15.2*5sbs)=+.76sb
No improvement: (.84.8*-1sbs)=-.84.8sbs
Total EV~
<font color="red">-.09sbs</font>
Read more on this stuff here:
Jason Pohl Overcard article His articles should be required reading when u are starting out HU/shorthanded. (He used to be a solid poster back when HUSh was first getting its legs.)
EDIT: Here is the same situation on the turn (because you would be investing 1bb compared to 1sb):
Improve on River: (15.2*4BBs)=+.608sbs
No improvement: (.84.8*-1BBs)=-.848sbs
Total EV=
<font color="red">-.24BBs</font>