that means the engine will need 9.7 lbs of air to every 1 lb of E85 for a
complete chemical reaction to occur.You want to know the volumetric flow rate to make a specific HP?
The Brake Specific Fuel Consumption (BSFC) for a turbocharged
E85 engine is ~0.77 lbs/(HP*hr). So, total mass fuel flow for 500HP at the flywheel on E85 = (500 x 0.77)/60 = 6.42 lbs/min To get volumetric flow rate, you will need the density of E85.
It's around 6.5 lbs/gallon. One gallon equals 3786 cc. So, total volumetric fuel flow for 500HP on E85 = 6.42/6.5*3786 = 3737 cc/min (total) Divide that by the number of injectors (6)... 3737/6 = 622 cc/min. Do not forget about duty cycle, most injectors are only capable of ~90% safe duty cycle,
so take the 622 and divide by 0.9 = 692 cc/min. To make 500HP at the flywheel on E85
with six injectors will require them to flow approximately 692 cc/min at 100% duty cycle. The higher octane of E85 vs. pump gas has no effect whatsoever on flow capacities of
the fuel system. The octane rating is only a measure of a fuel's resistance to spontaneous
combustion which is directly related to detonation or pinging. You may be able to argue
that higher octane means you could get away with a leaner A/F ratio... do so at your own risk.
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