I have 2 walbro HO pumps, 4x 1600cc injectors, stock fpr, stock lines, and upgraded fuel rail.

On E70 my IDC is in the 80% range @ 32 psi making 644whp/519trq. I'm on E85 and retuned now so I'm guessing I'm in the 660whp range @ 32 psi. I still haven't seen what this turbo can do at 40 psi and I'd love to find out.

I am going to install 2200cc injectors and up the boost soon. I might even go with an 8 injector setup and switch to a larger billet 6765 turbo, shooting for 900+whp.

E85 is the way to go.