HOW TO USE THE FUEL INJECTOR SELECTION CHARTS

In order to make an accurate injector selection based on the charts below, you will first need to know the peak horsepower output of your engine. This can be an estimate or an actual dyno-proven figure as long as it is reasonably accurate. Look up the column heading that features both the induction method ( normally aspirated, supercharged, or turbo ) and number of cylinders in your engine, and find your approximate peak horsepower rating. The injector size (left side of table) that corresponds to the row containing your estimated horsepower figure is the correct one to use.

Note that all injector ratings are based on fuel pressure of 45 psi. Running higher fuel pressure will increase the delivery rate of the injector, and running lower fuel pressure will decrease the fuel delivery rate.