| Your math is a bit off....
On the flop, once he bets the 1600, you are being laid about 3:1 on your money.
However, your out count is off. If you are putting him on Ax, then your ace outs are more then likely not good. Discounting them, I would give you 1 out for the aces, which is generous. Then you take the 4 5s that complete your wheel draw. One of those 5s also completes a flush now, so you have to discount that as well, giving you maybe 3 outs for the wheel draw.
Total, you have about 4 outs. You need the pot to lay you much better odds then this to continue with the hand.
On the turn, you are now getting about 4:1 on your money, your pot odds are not there to make your hand. If you were going to put him all in, you should have done it on the flop with 2 cards to come, not on the turn with only 1 to come if you were going to do it at all.
Personally, I fold the flop. I can see chasing a flush draw in this situation, but not a weak gutshot. | 
