the picture above doesn't have anything to do with vtec when it isn't engaged, plus his is a single cam. Do you have the timing right? You may be trying to open the valves into the piston. Either that or a bent valve.
Really? A LS/Vtec single cam
Edit: I see that the pic is a single cam now, and you missed the T in this
Maybe this, have you tried putting the timing belt on and turning over the motor by hand @ the crank?