Ok man, unstuffed, your looking at 12-14 minutes per pound at 350 degrees F. About 4 hours at 12 min per pound, assuming the turkey is thawed. If its not completely thawed, let it soak for a bit in cool, saltwater.
Personally I would salt the inside cavities, and stuff it with herb seasoned, cubed stuffing, brown up some sausage, about 7/8 cup of celery and 1/8 cup garlic, butter, onions, and chicken stock, and go 13-16 minutes per pound for about 5 hours.
In any case, do yourself a favor and layer strips of bacon over the breasts, wings and legs of the bird, you wont be disappointed.
Cover the bird with foil for the first few hours of cooking. With about 45-60 minutes to go, check the turkey with a meat thermometer, and remove the foil. Keep it in the oven and let it brown up, until the inside of the breast is at 165 degrees.
I have found with electric ovens, it typically takes longer to cook. My gas oven cooks a lot faster, so check your bird often. The bacon on top tends to "self baste" the turkey, but you may have to baste the turkey often after about the 2.5 hour mark.
In any case, just keep an eye on it after the first few hours, you will know when its getting close, take the foil off to brown it up, and have fun with it. I have been doing this for years with my family, we all get up to put the turkey together and have breakfast, and get the bird in the oven.
Good luck man and Happy Thanksgiving! If things don't work out IM me, we'll have plenty of food!