When it comes to high-performance fuel systems, selecting the right fuel injector is crucial to optimizing power and efficiency. AFIS Fuel Injectors are designed to work with a variety of fuel types, including pump gas, race gas, methanol, and ethanol. However, due to the high flow capabilities, not all AFIS injector sizes are recommended with every fuel type. Below is a detailed breakdown of AFIS Fuel Injectors, their recommended fuels, and the horsepower they can support based on the combination.
Crank vs Wheel Horse Power
When sizing injectors one of the most common questions is; "How much 'wheel' horsepower will the injectors support?" Choosing an injector based on horsepower at the wheel(s) is not accurate. Due to the differences in drive train styles & components the practical loss can vary between applications.
Using crankshaft horsepower in the only way to accurately size an injector. If there's enough fuel to support the crank HP, it will definitely support the wheel HP.
AFIS Fuel Injector Compatibility & Performance
180 lb/hr Injectors
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Fuel Compatibility: Pump Gas, Race Gas, Methanol, Ethanol
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Horsepower Range: 720 - 3,000 HP (depending on fuel and power adder)
250 lb/hr Injectors
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Fuel Compatibility: Pump Gas, Race Gas, Methanol, Ethanol
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Horsepower Range: 800 - 3,333 HP (depending on fuel and power adder)
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Note: For pump or race gas applications, it’s recommended to consult an AFIS tech to ensure proper setup.
400 lb/hr Injectors
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Fuel Compatibility: Methanol, Ethanol (Due to the high flow rate Gas is not recommended)
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Horsepower Range: 1,280 - 3,765 HP (depending on fuel and power adder)
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Note: For ethanol applications, consulting an AFIS tech is advised.
600 lb/hr Injectors
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Fuel Compatibility: Methanol only (Due to the high flow rate Gas/ Ethanol is not recommended)
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Horsepower Range: 1,920 - 2,286 HP (depending on power adder)
800 lb/hr Injectors
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Fuel Compatibility: Methanol only (Due to the high flow rate Gas/ Ethanol is not recommended)
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Horsepower Range: 2,560 - 3,048 HP (depending on power adder)
Final Thoughts
Selecting the right size Fuel Injector for your application is key to achieving maximum performance and drivability. Whether you're running pump/ race gas, methanol, or ethanol, understanding your fuel system’s requirements will ensure you make the best choice.
If you are unsure which size(s) injectors are right for your combination, contact our tech department for a customized recommendation. Reach out to sales@HPRaceBrands.com or call 219-996-7777.