Fuel Injector Flow Rate Calc
Injector Sizing & Duty Cycle
$1.99 · Designed for iPad. Not verified for macOS.
Size your fuel injectors by HP, fuel type, and duty cycle.
Building a turbo setup or swapping injectors and need to know if your fuel system can keep up? This calculator tells you exactly what flow rate each injector needs based on your target horsepower — so you never run lean under boost.
Enter target HP, cylinder count, BSFC, and duty cycle to get required flow per injector in lb/hr and cc/min. Supports gasoline, E85, diesel, and methanol with automatic BSFC defaults. Includes fuel pressure correction factor for non-standard rail pressures.
FEATURES:
- Required injector flow per cylinder in lb/hr and cc/min
- Fuel pressure correction factor calculator
- Gasoline, E85, diesel, and methanol support
- Automatic BSFC defaults per fuel type
- 1 to 16 cylinder configurations
- Duty cycle input for safe injector headroom
Essential tool for engine tuners, fuel system builders, and performance shop technicians. Works offline.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Added a More Pro Tools section to discover related field calculators.
The developer, Shanghai Sheyuan Network Technology Co., Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Shanghai Sheyuan Network Technology Co., Ltd.
- Size
- 1 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Sheyuan Inc.
