There are no official hp number for e85. I gained 32hp running e85 over 93 octane with a tune.
Don't be fooled by the pulled timing when running e85 that's because it runs cooler, higher octane, and the AFR changes to 9.85.
My 93 tune runs 24 degrees WOT and with E85 I'm only running 15-17 degrees. Just be careful messing with timing while running E85 as it won't knock.
I put down 363awhp with 160 degree Tstat, cold air intake, and Efilive.