Injector Size Calculator

Use this Injector calculator to correctly size your Injectors vs your Horsepower Goal.
**Also makes a great “Dyno Sheet” Lie Detector!**


When buying injectors keep an 80% Injector Duty Cycle limit.
90% IDC is considerd the Maximum Safe Limit. If your IDC is more than 90% your Injectors are too small!

Horsepower supported @ crankshaft: 
Horsepower supported @ wheels: