I don't often play full ring but could he have bet the flop with 8sxs and have picked up a flush on the turn? He could have a pair and think it is still good against you raising overcards.

If you are going to call down why not advocate raising this turn, what would he 3-bet with here that you aren't drawing very slim against.

You could still quite possibly have the strongest hand, since you don't have a read on the player. If he was something like 17/4/.9 then you may think about a fold.

Absent of a read I think I raise the turn.

A) looking for a free showdown
B) raising for value
C) folding if he 3-bets as we are beat 99% of the time?

True