Fuel Injector Clinic 1000cc High-Impedance Injector Set for LS3, LS7, LSA, L76, L92 and L99

Fuel Injector Clinic 1000cc High-Impedance Injector Set for LS3, LS7, LSA, L76, L92 and L99

Part Number: IS303-1000H

The Fuel Injector Clinic IS303-1000H is a matched set of eight high-impedance fuel injectors for LS3, LS7, LSA, L76, L92, and L99 applications. The injectors are configured as a drop-in physical and electrical fit for the supported factory fuel rail, intake manifold, and wiring-harness arrangement.

Each injector flows approximately 1000 cc/min at 43.5 psi and 1040 cc/min at the GM original-equipment fuel pressure of 58 psi. This provides substantial fuel capacity for forced-induction, E85, and other high-output combinations while retaining the short-pulse control and characterization required for stable idle and part-throttle operation.

Fuel Injector Clinic individually serial-numbers and tests each injector using its Data Match Technology process. The supplied data sheet includes dynamic slope flow information, individual injector offset deviations, and voltage-offset data for accurate ECU configuration.

Key Features

• Set of eight matched port-fuel injectors
• Designed for LS3, LS7, LSA, L76, L92, and L99 applications
• 1000 cc/min nominal flow rate at 43.5 psi or 3 bar
• Approximately 85 lb/hr at 43.5 psi
• Approximately 1040 cc/min or 100 lb/hr at 58 psi or 4 bar
• Saturated, high-impedance electrical design
• Drop-in physical and electrical fit for supported factory applications
• Suitable for gasoline and E85 applications
• Individually serial-numbered injectors
• Matched using Fuel Injector Clinic Data Match Technology
• Application-specific GM ECU data available from Fuel Injector Clinic
• O-rings supplied for the listed factory application
• Covered by Fuel Injector Clinic’s lifetime warranty against defects in original manufacture

Kit Includes

• Eight Fuel Injector Clinic 1000 cc/min high-impedance injectors
• Application-specific upper and lower O-rings
• Fuel Injector Clinic Data Match sheet with injector characterization information

Technical Specifications

Flow Rating

• 1000 cc/min at 43.5 psi differential fuel pressure
• Approximately 85 lb/hr at 43.5 psi differential fuel pressure
• Approximately 1040 cc/min at 58 psi differential fuel pressure
• Approximately 100 lb/hr at 58 psi differential fuel pressure
• Flow tested using CF-16B calibration fluid at approximately 90°F

Electrical Configuration

• Saturated, high-impedance injector design
• Compatible with conventional saturated injector drivers
• No external injector resistor pack required in supported applications

Injector Characterization

• Dynamic slope flow rate for each individually serial-numbered injector
• Individual injector offset-deviation values
• Injector voltage-offset table
• GM ECU data available through Fuel Injector Clinic
• Injector data must be entered correctly for the ECU, fuel pressure, and fuel being used

Application Notes

• This injector set is designed for LS3, LS7, LSA, L76, L92, and L99 intake, fuel-rail, and harness configurations.
• This listing is for one matched set of eight injectors.
• FIC identifies this set as a drop-in fit for the supported factory application.
• Aftermarket fuel rails, intake manifolds, injector bungs, or unusual combinations may change the required injector length, O-ring size, or electrical connection.
• Confirm fitment before ordering when using non-factory rails or intake hardware.
• The published 1000 cc/min rating is measured at 43.5 psi differential fuel pressure.
• At the GM factory pressure of 58 psi, the injectors flow approximately 1040 cc/min.
• Injector flow changes with differential fuel pressure; the ECU configuration must reflect the actual base pressure and manifold-pressure reference strategy.
• Injector characterization data must be entered into the ECU rather than relying only on the nominal flow rating.
• Fuel-system capacity, pump selection, regulator capacity, line sizing, and electrical supply must be adequate for the intended fuel and power level.
• Fuel Injector Clinic states that its high-impedance injectors are compatible with gasoline and E85.
• Power capability is not specified because required injector capacity depends on fuel type, base pressure, brake-specific fuel consumption, duty-cycle target, and engine configuration.

Emissions and Competition-Use Notice

Unless specifically identified as emissions-legal for the applicable vehicle and application, this product is intended for sanctioned competition, off-road, or other non-emissions-controlled use. Installation or use on an emissions-controlled vehicle operated on public roads may violate federal, state, or local law. The purchaser and installer are responsible for confirming and maintaining compliance with all applicable emissions and vehicle-use regulations.