Start / Calculations / General Calculations / Fuel
The Fuel page allows you to specify the type of fuel being used.
Enter the proportion of each fuel type being used. Percentages can be used if desired. The proportion should be based on volume, not weight. If you are only using one type of fuel, such as gasoline, enter a 1 in the input line for that fuel, and enter 0 for all other fuels.
Listed first are the primary fuel types, including gasoline, methanol, nitromethane, and others. These fuels must make up the majority of your fuel mixture. The chemicals beginning with Acetone considered additives. Additives affect power and octane but are not used in efficiency or flow calculations.
Nitrous flow rate is used in the power calculation but does not change the numbers displayed in the fuel calculations. Unlike all other entries on this page, nitrous oxide is entered as a flow rate since it is not used continuously. Like fuel additives, nitrous flow affects power, but it is not used in efficiency or flow calculations.
The fuel flow factor that is displayed among the calculated data is the amount of flow in proportion to that of gasoline. This flow value is based on volume. It is based on the stoichiometric (chemically correct) air/fuel mixture ratios for the fuel blend.
Water (such as water injection systems) has been omitted not because it is not really a fuel, but because it is not normally used continuously, and because the proportion of flow is often variable with engine speed, boost pressure, etc. Water injection can decrease octane requirement and improve power by reducing intake temperature, especially in boosted engines.
We have tried to include all additives with which we are familiar. If we have left out an additive that you like, please let us know and we will try to include it!