Fresh kielbasa, aka White kielbasa, as in raw meat in a casing, is a simmer or grilling sausage. It is closer to a Brat than common kielbasa. I am a huge fan of fresh simmered with sauerkraut. Anywho, to answer your question, 225-250 for a couple hours will get you to 165. If it contains cure, some guys make one big batch with a cure then smoke some and simmer or grill the rest, you can smoke at lower 170 until the IT hits 150...JJ