What injector size does EEC Analyzer calculate for a 500 HP 8-cylinder engine with a 20% safety margin?

The calculated injector size is 33.75 lb/hr; the entered/selected injector size is 42 lb/hr at 43.5 PSI rated line pressure, flowing 42.0 lb/hr at 43.5 PSI fuel line pressure.

What fuel pump size is required per this calculation?

With a 30% safety margin, the required fuel pump size is 292.50 lbs/hr, equal to 40.34 gallons/hr or 152.69 liters/hr.

What BSFC values does the document list for naturally aspirated vs forced induction engines?

Naturally aspirated: .45 - .50; Forced induction: .65 - .68. The estimated BSFC shown is 0.45.

What fuel pressure regulator settings are shown?

39 psi relative (base pressure/pressure drop across injector), with an observed vacuum of -18 in; observed boost field shows 10 psi (unselected) and observed rail pressure is blank (-----).

What software produced this calculation?

EEC Analyzer version 2.7.0 (Unregistered), shown on its Fuel Delivery tab.

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EEC Analyzer 2.7.0 Fuel Delivery Calc - 500 HP V8 Injector & Fuel Pump Sizing

EEC Analyzer 2.7.0 fuel-delivery calculation screen: 500 HP target, 42 lb/hr injectors, 8 cyl

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EEC Analyzer 2.7.0 fuel-delivery tab sizing for 500 HP / 8-cyl: needs 33.75 lb/hr injectors (using 42 lb/hr), fuel pump 292.50 lb/hr (40.34 gph), 43.5 PSI rated/line pressure, BSFC ~0.5.

AI caption August 2006 · Photo 129 of 243

This document is a screenshot of the EEC Analyzer 2.7.0 software (unregistered version) showing the Fuel Delivery calculation tab. It records a fuel system sizing calculation for a 500 horsepower, 8-cylinder engine. With a 20% safety margin, the calculated required injector size is 33.75 lb/hr; the user has selected 42 lb/hr injectors with a rated line pressure of 43.5 PSI and a fuel line pressure of 43.5 PSI, yielding an effective flow of 42.0 lb/hr. The fuel pump section, using a 30% safety margin, calculates a required fuel pump size of 292.50 lbs/hr (40.34 gallons/hr or 152.69 liters/hr). The BSFC (Brake Specific Fuel Consumption) section shows an estimated value of 0.45, with reference ranges of .45–.50 for naturally aspirated engines and .65–.68 for forced induction. The Fuel Pressure Regulator section shows 39 psi relative (base pressure/pressure drop across injector) with an observed vacuum of -18 in. The software's other tabs (Data Log, MAF, Injector Slope, OBDII Scanner, etc.) indicate it is a Ford EEC tuning/analysis tool. A reader can learn the injector and fuel pump flow requirements calculated for this 500 HP V8 build.

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Frequently asked questions

What injector size does EEC Analyzer calculate for a 500 HP 8-cylinder engine with a 20% safety margin?: The calculated injector size is 33.75 lb/hr; the entered/selected injector size is 42 lb/hr at 43.5 PSI rated line pressure, flowing 42.0 lb/hr at 43.5 PSI fuel line pressure.
What fuel pump size is required per this calculation?: With a 30% safety margin, the required fuel pump size is 292.50 lbs/hr, equal to 40.34 gallons/hr or 152.69 liters/hr.
What BSFC values does the document list for naturally aspirated vs forced induction engines?: Naturally aspirated: .45 - .50; Forced induction: .65 - .68. The estimated BSFC shown is 0.45.
What fuel pressure regulator settings are shown?: 39 psi relative (base pressure/pressure drop across injector), with an observed vacuum of -18 in; observed boost field shows 10 psi (unselected) and observed rail pressure is blank (-----).
What software produced this calculation?: EEC Analyzer version 2.7.0 (Unregistered), shown on its Fuel Delivery tab.