220 engine Hp @80% duty = 360.94cc / 34.38Lb/Hr
for E85 see below
34.38 x 1.47 = 50.54
= 530cc
now this should give you some idea of estimated injector size on e85.
i dont know your actual target Hp... but just selected 220Hp at random.
Edit: All above @ 80% duty... good to leave some head room
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