lets assume 500whp=550hp which requires 55lb/min of air give or take
880cc injectors are 83.6lb/min@43.5psi x 4 = 334lb/hr = 5.573lb/min. with an air fuel ratio of 7.97:1 for e85(equivalent to 12:1 for gasoline) this would require 6.9lb/min of fuel at 43.5psi which these injectors dont supply at 100 percent duty cycle. even at stoich these wont supply enough fuel for 55lb/min of air.