I'm looking for any information in regards how the distillation curve of a given fuel(s) effects the performance of the fuel. Pump fuel is tied to standards for certain evaporation points where as aftermarket "racing" fuels are not. For a comparison of what I'm referring to...
Pump Gas, 93 AKI, 10% ethanol
RON = 98
MON = 88
(R+M)/2 = 93
Spec. Gravity = 0.745
Oxygen = 3.7%
10% evap. = 121*F
50% evap. = 180*F
90% evap. = 325*F
Final BP = 403*F
VP C45
RON = 106
MON = 100
(R+M)/2 = 103
Spec. Gravity = 0.738
Oxygen = 13.6%
10% evap. = 118*F
50% evap. = 164*F
90% evap. = 217*F
Final BP = 326*F
Speaking in terms of a port-injected EFI, throttle body injected EFI, or carbureted engine where you have a wet intake port. What effect would a lower temperature distillation curve have on the performance of the fuel in terms of power and efficiency of complete burn?
Pump Gas, 93 AKI, 10% ethanol
RON = 98
MON = 88
(R+M)/2 = 93
Spec. Gravity = 0.745
Oxygen = 3.7%
10% evap. = 121*F
50% evap. = 180*F
90% evap. = 325*F
Final BP = 403*F
VP C45
RON = 106
MON = 100
(R+M)/2 = 103
Spec. Gravity = 0.738
Oxygen = 13.6%
10% evap. = 118*F
50% evap. = 164*F
90% evap. = 217*F
Final BP = 326*F
Speaking in terms of a port-injected EFI, throttle body injected EFI, or carbureted engine where you have a wet intake port. What effect would a lower temperature distillation curve have on the performance of the fuel in terms of power and efficiency of complete burn?