HUSNG: Facing large Pf raises from Loose passive player

[ghettointlectual]

I posted this hand because this villain does not raise much he usually just limps in and then he raises to 4bb all of sudden and I have KT, I ended up folding the hand but would any of you have called here or maybe even reraised?

Full Tilt Poker
No Limit Holdem Tournament
Blinds: t15/t30
2 players
Converter

Stack sizes:
SB: t1910
Hero: t1090

Pre-flop: (2 players) Hero is BB with T[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/spade.gif[/img]
<font color="#cc0000">SB raises to t120</font>, Hero folds.
Uncalled bets: t90 returned to SB.

Results:
Final pot: t60

IN this hand my question has to do with math, do I have enough equity given my shortstack to go All in here (this is the same villain who rarely raises), and how would I figure this out?

Full Tilt Poker
No Limit Holdem Tournament
Blinds: t15/t30
2 players
Converter

Stack sizes:
SB: t2540
Hero: t460

Pre-flop: (2 players) Hero is BB with 4[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/spade.gif[/img]
<font color="#cc0000">SB raises to t270</font>, Hero folds.
Uncalled bets: t240 returned to SB.

Results:
Final pot: t60