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 126 of 240

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.