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Calculate Fuel Injector Sizing 2
By using SMOKEmUP.com's automath you agree to use this service for your own personal use. Re-transmission, performing calculations for others is PROHIBITED and will result in termination of your account with no refund.

Enter your fuel injector flow in lbs/hr @ fuel pressure. This will determine the max hp at different injector duty cycles. You can enter a different fuel pressure if you are running at a different pressue than what the injector flow is rated at.



Injector Flow Rate (lb/hr)

Fuel Pressure at injector flow rating (psi)

New Fuel Pressure (psi)

Number of Cylinders

Brake Specific Fuel Consumption (BSFC)

Recommended #'s 0.45 for Normally Aspirated, 0.55 for Forced Induction.

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