My friend's stock b16 ran a sad 14.7. The problem is the motors complete lack of torque. B18c, like the GSR or Hype-R would be the best guess. $0.02.

Edit: IF you go the turbo-b16 route, hit me up.. I can help with the turbo and what not. There are some T3's on ebay going for like 300 or so.