I've been to Frankfurt Airport once, and it felt like a maze.

I'd appreciate if anyone can give me some suggestions as to how to expedite my transfer tomorrow.

I'm flying YVR-ORD-FRA-IST. I have a stated connection time of 85 minutes at Frankfurt, but I suspect it might be cut somewhat given recent flight history.

According to the Frankfurt airport site, it seems that ORD-FRA lands in Terminal 1 at 10:15, and that my Turkish Airlines FRA-IST flight will be in Terminal 1B, leaving at 11:40.

How do I travel from one to the other most effectively? Do I have any immigration to worry about, given I'm going from Schengen to non-Schengen?

Thanks for your help!