Fuel Injector Clinic 1650cc High-Z Injector Set — Holley GM Composite Intakes
Part Numbers: ISH03-1650H & PGTJETR8Q
The Fuel Injector Clinic ISH03-1650H is an eight-injector high-impedance set for Holley GM composite intake applications. FIC’s standard product configuration is ISH03-1650H & PGTJETR8Q, which includes eight Jetronic quick-release solder-in pigtails. FIC also offers EV1 and EV6 direct-connection configurations, plus a Multec II option using the PADPJtoGM8 plug-and-play adapter set.
Each injector is rated at 1650 cc/min and 160 lb/hr at 43.5 psi / 3 bar. At 58 psi / 4 bar, FIC rates each injector at approximately 1900 cc/min and 180 lb/hr.
FIC’s 1650cc high-impedance injector uses stainless-alloy valve construction and is compatible with pump gasoline, E85, Q16, VP Import, FTW, and other MTBE oxygenated race fuels. Its high-impedance architecture avoids the need for a separate peak-and-hold driver while retaining the short-pulse-width control required for stable idle and street drivability when the ECU is configured with the correct injector data.
Each injector is individually serial numbered and matched using Fuel Injector Clinic’s Data Match Technology. The supplied Data Match Sheet includes measured matching results and latency information, and FIC provides injector characterization data for supported ECU platforms.
Key Features
- Set of eight Fuel Injector Clinic high-impedance injectors
- Designed for Holley GM composite intake applications
- Standard FIC configuration: ISH03-1650H & PGTJETR8Q
- 1650 cc/min / 160 lb/hr per injector at 43.5 psi / 3 bar
- Approximately 1900 cc/min / 180 lb/hr per injector at 58 psi / 4 bar
- Saturated / high-impedance electrical design
- Standard configuration includes eight Jetronic quick-release solder-in pigtails, PGTJETR8Q
- EV1 direct-connection option available
- EV6 direct-connection option available
- Multec II harness option available using PADPJtoGM8 adapters
- Stainless-alloy valve construction
- Compatible with pump gasoline, E85, Q16, VP Import, FTW, and other MTBE oxygenated race fuels
- Fuel Injector Clinic Data Match Technology
- Each injector individually serial numbered
- Matched flow and latency information supplied on the Data Match Sheet
- Application-specific O-rings included
- Fuel Injector Clinic lifetime warranty against defects in original manufacture
Kit Includes
- Eight Fuel Injector Clinic 1650cc high-impedance injectors, ISH03-1650H
- Eight Jetronic quick-release solder-in pigtails, PGTJETR8Q, with the standard configuration
- Application-specific injector O-rings
- Individual injector serial numbers
- Fuel Injector Clinic Data Match Sheet with matching and latency information
- Access to applicable Fuel Injector Clinic injector characterization data
Technical Specifications
- Nominal injector size: 1650 cc/min
- Flow at 43.5 psi / 3 bar: 1650 cc/min / 160 lb/hr per injector
- Flow at 58 psi / 4 bar: approximately 1900 cc/min / 180 lb/hr per injector
- FIC rating test temperature: 90°F fuel temperature
- FIC calibration fluid: CF-16B
- Injector type: saturated / high impedance
- Quantity: eight injectors
- Application family: Holley GM composite intakes
- Valve construction: stainless alloy
Available Connector and Wiring Configurations
- Solder-In Pigtails — ISH03-1650H & PGTJETR8Q: FIC’s standard configuration. Includes eight Jetronic quick-release pigtails for replacing the existing injector connectors.
- EV1 Connector — Direct Connection: direct-connect option for harnesses already equipped with the matching EV1 connector.
- EV6 Connector — Direct Connection: direct-connect option for harnesses already equipped with the matching EV6 connector.
- Multec II Connector — ISH03-1650H & PADPJtoGM8: uses FIC’s set of eight Jetronic/EV1-female to GM/Delphi-male plug-and-play adapters to avoid cutting or soldering the existing harness.
Application Notes
- FIC lists ISH03-1650H for Holley GM composite intake applications. This is an intake-family fitment rather than a vehicle-specific listing, so connector choice must match the engine harness.
- The 1650cc rating is measured at 43.5 psi / 3 bar; FIC rates the same injector at approximately 1900 cc/min and 180 lb/hr at 58 psi / 4 bar.
- Fuel-system sizing should be based on actual differential fuel pressure, fuel type, target power, and injector duty cycle rather than the nominal 1650cc designation alone.
- The standard ISH03-1650H & PGTJETR8Q configuration requires replacing the existing injector connectors with the included solder-in pigtails.
- EV1 and EV6 direct-connect options eliminate pigtails when the existing harness already uses the matching connector.
- The Multec II option uses PADPJtoGM8 adapters rather than modifying the factory-style harness.
- Use FIC-supplied injector characterization data rather than generic flow or latency values.
- Fuel pumps, regulator, rails, filters, plumbing, ECU, and tuning are not included.
- This product is a port-fuel-injector set and is not a direct-injection injector replacement.
Emissions and Competition-Use Notice
Performance fuel-system modifications may affect emissions compliance and road-use legality. The purchaser and installer are responsible for ensuring the completed vehicle complies with applicable requirements.