If you're on stock fueling and dme management (with regards to E85), your car is going to be an unhappy camper with 100% e85 on a cold start. I can't say i've ever tried anywhere near that aggressive a mixture, but I don't think there's anything abnormal about your experience...call me crazy, but don't you have flexfuel lines? I seem to remember a thread or post from you about them. Could just be the food coma i'm in from xmas eve dinner lol.
E88 FBO N54 Alpinweiss/Coral Red/Meisterschaft Race/Berk Resonated/Macht Schnell 3"/ER CP/Synapse/VRSF FMIC/FFTEC LPFP/HFS-4 DO Stainless Lines/BMS DCI/BMS Thermostat Delete/Rob Beck PCV Valve + Cap/BMS OCC/PTF E50/ST Coilovers/M3 Front Control Arms + Tension Rods/M3 Subframe Bushings/M3 FSB/DINAN Camber Plates/Apex ARC-8/Project Kics/Macht Schnell Studs/VAC Hubs/Rogue Transmission Mounts/Alpina TCU Flash/Icarbon/Kerscher/BMW Performance