BSFC = Fuel Consumption / Power Produced
While E85 will require more fuel due to it's low BTU/Gal, it will make more HP. I wouldn't think the BSFC would change for different fuels.
Hot Air
BSFC is a unique number range associated with each unique type of fuel. It is a very important number in the determination of how much fuel of a certain type must be burned to create a specific amount of horsepower. The BSFC number for one specific type of fuel will fit within a range depending on the efficiency of the engine and whether you are looking at a lean burn ratio, a stoich ratio or a rich burn limit ratio to create the HP you are calculating for. That's why you may see a BSFC range of .45-.65 for gasoline. The lower end of the range would be for lean burning, and/or an engine that makes efficient use of the fuel. The higher end of the scale would represent inefficient use of the fuel, or cases where extra fuel is being used to cool the combustion process, such as in supercharging or turbocharging.
target horsepower x BSFC = total lb/hr fuel requirement for the engine.
example: 1,500 HP x 1.35 BSFC = 2,025 lb/hr
1.35 being on the higher end of the BSFC range for methanol.
total lb/hr fuel requirement / number of injectors being used = lb/hr fuel requirement per injector (uncorrected).
example: 2,025 lb/hr / 18 injectors = 112.5 lb/hr per injector (uncorrected)
60000 / peak engine rpm = available injector time (ms) per crankshaft revolution.
60000 / 9000 rpm = 6.67ms
(available injector time per crankshaft revolution - injector recovery time in ms) / available injector time per crankshaft revolution = maximum injector duty cycle.
example: (6.67ms - 1.3ms) / 6.67ms = 80.5% duty cycle
lb/hr fuel requirement per injector (uncorrected) / maximum injector duty cycle = required injector size.
example: 112.5 lb/hr / .805 (80.5%) duty cylce = 139.75 lb/hr injector
If you want to be safe about sizing the injector, pick a BSFC number that is on the higher end of the range for the fuel you're doing the calculation for.