private double CalculateIntakeLoss(int rpm)
{
double retval = 0.08;
if (rpm < 880) retval = 0.08;
else if (rpm < 1260) retval = 0.10;
else if (rpm < 1640) retval = 0.17;
else if (rpm < 2020) retval = 0.28;
else if (rpm < 2400) retval = 0.42;
else if (rpm < 2780) retval = 0.50;
else if (rpm < 3160) retval = 0.58;
else if (rpm < 3540) retval = 0.65;
else if (rpm < 3920) retval = 0.74;
else if (rpm < 4300) retval = 0.82;
else if (rpm < 4680) retval = 0.92;
else if (rpm < 5060) retval = 1.03;
else if (rpm < 5440) retval = 1.07;
else if (rpm < 5820) retval = 1.10;
else if (rpm < 6000) retval = 1.08;
else retval = 1.43;
return retval;
}