NL4 FD

On flop we I think its good call. We need to win another 80 cents if we hit.

If he bets 1/2 (85 cents) on turn, pot woudl be 2.55, and we need 0.85*4 = 3.4 pot. So if we hit we need to win 85 cents more on avg.

I think its considerable when we are IP and also our draw is to the nuts.

I think it differes a lot when we are IP. Cause when OOP - if we hit and check, he might check back and we do not win extra. If we donkbet OOP - then he sees this as strong move, cause we do not donkbet bluff; also when he has marginal hand - he just calls, so we win less. When he has marginal hand OOP, he might still want a value, for exaplle he has 8 high FD. He bets OOP because he does not want to risk that we check back.

And we raise. Now he will call most of the time with 8 high FD and we win money.

It is just a raise OTF, not a 3bet. But I think you get the correct odds to call his raise OTF with your nut FD.
OTT we just take our calculator again and see if we can call If he bets under 1/2 pot you should have a mathematical call. Against that bet size I think folding is best.
You played this hand well.

OTF: You have good implied odds playing in position against this bet and IMO should call. But it's a thin line, considering he can a have a set and can hit a FH. (If OOP I would not call this size bet).

Turn: You should call 1/2 pot size bets. (If OOP, a 1/2 pot size call is still ok, but i rather fold bucause you probably don't have enough implied odds if you hit your Flush)

Sorry, there should be raise of course, not 3 bet. Thanks for responses guys.