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Injector Flow Rate
Injector Flow Rate Conversion
lbs/hr = cc/min × 0.0948
cc/min = lbs/hr × 10.5485
Where: cc/min = cubic centimeters per minute lbs/hr = pounds per hour
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Injector Flow Rate Reference
Common Injector Sizes by Application:
- • Stock NA: 200-400 cc/min (19-38 lbs/hr)
- • Mild Turbo: 400-600 cc/min (38-57 lbs/hr)
- • Performance Turbo: 600-1000 cc/min (57-95 lbs/hr)
- • High Performance: 1000-1500 cc/min (95-142 lbs/hr)
- • Race/E85: 1500-2500+ cc/min (142-237+ lbs/hr)
- • Diesel: 300-800 cc/min (28-76 lbs/hr)
- • Motorcycle: 150-350 cc/min (14-33 lbs/hr)
Understanding Injector Flow Rate
Injector flow rate is a critical specification for fuel injectors, indicating how much fuel they can deliver in a given time period. This measurement is essential for engine tuning, especially in performance and modified applications.
Benefits:
- • Determine appropriate injector size for engine builds
- • Calculate fuel system requirements for power goals
- • Ensure adequate fuel delivery under all conditions
- • Optimize fuel atomization and engine efficiency
- • Plan for future performance modifications
Important Considerations:
- • Flow rates measured at standard pressure (43.5 psi/3 bar)
- • Injector size should match engine horsepower requirements
- • Undersized injectors can lead to lean conditions and engine damage
- • Oversized injectors may cause poor fuel atomization and reduced efficiency
- • Different fuels (E85, methanol) require larger injectors