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Injector Size Calculator

Updated August 5, 2025 1 minute read Tools
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Use our injector size calculator tool to figure out what injectors you need!

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Enter your estimated or target engine horsepower at the crank.
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Enter total number of cylinders your engine has.
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Different fuels burn at different rates. E85 and Methanol require larger injectors.
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Brake Specific Fuel Consumption (BSFC) is how much fuel (in lb/hr) is required to make 1 horsepower.
Defaults provided based on fuel type and boosted selection. Adjust manually if needed.
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Recommended range is 75–85% to prevent maxing out injectors under load.

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