Injector Flow Rate Calculator
Use this calculator to determine the minimum injector flow rate (cc/min) needed for your horsepower target. Results are a guide — contact us to confirm the right injector for your application.
Calculator
How to Use This Calculator
Enter your target wheel horsepower, number of cylinders, fuel type, and maximum injector duty cycle. The calculator uses the standard formula:
CC = (HP × BSFC) ÷ (cylinders × duty_cycle × 10.5)
Always choose an injector at least 10-15% larger than the calculated minimum to leave headroom for fuel system variation and future upgrades.
Quick Reference
| CC Rating | Approx HP (4-cyl, Gas) |
|---|---|
| 550cc | ~370 WHP |
| 650cc | ~430 WHP |
| 850cc | ~560 WHP |
| 1000cc | ~660 WHP |
| 1200cc | ~790 WHP |
| 1650cc | ~1085 WHP |
| 2200cc | ~1450 WHP |
| 2600cc | ~1710 WHP |