Fuel Flow Calculator

The Injector Dynamics fuel flow calculator is a departure from traditional online calculators which rely on Brake Specific Fuel Consumption (BSFC). There are two sources of error inherent in BSFC based fuel flow calculations. First, BSFC is a rarely measured parameter which few will have access to, and second, being a measure of efficiency, it is dependent on any factor that would affect the overall efficiency of the engine. For instance, a high boost engine running pump gas may require 10-15 degrees less ignition advance than the same engine running race gas. This reduction in timing, and the corresponding reduction in power will have a direct and proportional effect on fuel efficiency, or BSFC. For the reasons stated above, fuel flow calculations based on an estimated BSFC value are so error prone, that the are often meaningless. The Injector Dynamics fuel flow calculator is not based on efficiency. It works by estimating airflow based on a few known parameters, and then calculating fuel flow directly from exhaust lambda. The result is a far more accurate estimation, which allows you to pick the right injector the first time. To choose the best fuel injector for your application, enter the required parameters, click the submit button, and note the injector duty cycle required for the conditions you have specified.