Do i need to limit my diet after bcir?

Possibly: Best to discuss with your surgeon whether the operation requires a special diet afterwards. (s)he is best qualified to answer that question.

Yes to a degree: Ileal resevoirs are frought with complications but one can male their life easier by maintaining an ileostomy type of diet. This means avoiding foods that we would consider undigestible (corn). This makes irrigation and elimination much easier.