You can swap 42lb injectors in with the e85 swap and it runs great no tuning.
I imagine you will struggle with fuel pumps and filters making sure that you dont drop fuel pressure.
With 33lb stock injectors you can run about e60 on a stock pulley. You will see a very small mileage drop. Its a great money saver and you can mix with 87 octane. http://www.grandprixforums.net/threa...e-in-E85-areas
All injectors are not the same you don't just plop in bigger injectors without proper data, what about your transients?
06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k