The attached file contains records at home and on the road. The records are only conference records since 2006, besides Independents. Each team has a home win%, road win %, overall win % calculated. I then caculated the difference in home and road win percentage. From that i took the difference in home and road win percentage and divided it by each teams possible difference (making the max score 1) and sorted by that value. For example a team has a 100% home win percentage but their % diff isn't that great since they win most of their road games. However, they have the highest difference they could possibly have and therefore get a 100%. That number is then averaged with (home w%-road w%)
The first sheet has the teams by conference, the second lists all the teams in BCS conferences which filters for each column, the third is all teams, and the fourth lists which conference has the best home field advantage.
Click here to download the excel file