E85 will help out with your EGT's a lot to once you get it dialed in.
By the way you may find yourself running out of injector with the injectors you have with E85 and turbo.
Heres a good calculator for ya maybe?
http://fuelinjectorclinic.com/flow-calculator
I think I used this with my turbo bike, I wound up getting 550cc injectors and I'm running spot on.