Fishy 4th Street raise?

Was this raise clever or fishy? I figured as long as my equity is greater than 1/5 here, a raise would be profitable.

(The open 4's only made a small bet, and I doubled.)

7 Card Stud High ($5/$10), Ante $0.50, Bring-In $2 (converter)

3rd Street - (0.80 SB)

Seat 1: xx xx 6[img]/images/graemlins/spade.gif[/img]___calls
Seat 2: xx xx 2[img]/images/graemlins/heart.gif[/img]___brings-in
Hero: 3[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/club.gif[/img]___calls
Seat 4: xx xx 4[img]/images/graemlins/heart.gif[/img]___calls
Seat 5: xx xx T[img]/images/graemlins/club.gif[/img]___calls
Seat 6: xx xx 3[img]/images/graemlins/diamond.gif[/img]___calls
Seat 7: xx xx 9[img]/images/graemlins/diamond.gif[/img]___folds
Seat 8: xx xx 6[img]/images/graemlins/diamond.gif[/img]___folds

4th Street - (3.20 SB)

Seat 1: xx xx 6[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/spade.gif[/img]___folds
Seat 2: xx xx 2[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/heart.gif[/img]___calls___calls
Hero: 3[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/club.gif[/img]___raises
Seat 4: xx xx 4[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/diamond.gif[/img]___bets___calls
Seat 5: xx xx T[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/heart.gif[/img]___calls___calls
Seat 6: xx xx 3[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/club.gif[/img]___calls___calls