Description
The FiTech LS 750HP EFI LS3 Returnless Module Kit w/Coils & LED (79814) provides a comprehensive solution for upgrading your LS engine to modern electronic fuel injection. Designed for LS engines with LS3-style cylinder heads, this kit supports up to 750 horsepower and offers both self-tuning and user-tunable capabilities. This master kit includes all necessary components for a seamless installation.
KEY FEATURES AND BENEFITS:
- Provides precise fuel and spark control, improving engine performance and efficiency.
- Self-learning technology automatically adjusts fuel delivery.
- User-tunable settings allow for fine-tuning.
- 102mm throttle body and 55 lb/hr injectors ensure optimal airflow and fuel delivery.
- Included in-tank fuel pump module simplifies installation.
- Touchscreen display allows for easy monitoring and adjustments.
SPECIFICATIONS:
- Fuel Injection Style: Multi-port
- Fuel Injection System Type: Multi-port Throttle Body
- Maximum Horsepower with Gas: 750 HP
- Timing Control Compatible: Yes
- ECM Included: Yes
- Self Tuning: Yes
- User Tunable: Yes
- Fuel System Included: In-tank fuel pump module, returnless
- Ignition System Included: Coil packs
- User Interface Included: 4.5 in. display
- Metering Style: Speed density
- Intake Material: Aluminum
- Throttle Body Diameter: 102mm
- Injector Size: 55 lbs/hr
HOW TO USE:
- Preparation: Disconnect the vehicle’s battery. Remove the existing intake manifold and fuel system.
- Installation: Install the FiTech intake manifold onto the LS engine, ensuring proper gasket sealing.
- Throttle Body and Fuel Rails: Mount the 102mm throttle body and install the fuel rails with the 55 lb/hr injectors.
- Fuel System: Install the in-tank fuel pump module, connecting the fuel lines to the fuel rails.
- Wiring: Connect the FiTech wiring harness to the engine sensors, ECU, and coil packs.
- ECU and Sensors: Mount the ECU and connect the oxygen sensor, MAP sensor, IAT sensor, TPS sensor, and IAC motor.
- Touchscreen Setup: Connect the touchscreen display and mount it in a convenient location.
- Initial Setup: Follow the on-screen prompts to configure the ECU for your engine.
- Testing: Reconnect the battery and start the engine. Monitor the touchscreen display for any error codes.
- Tuning: Allow the self-learning feature to adjust fuel delivery. Fine-tune settings as needed.
BENEFITS OF USING THE FITECH LS 750HP EFI LS3 RETURNLESS MODULE KIT W/COILS & LED (79814):
- Enhanced engine performance with precise fuel and spark control.
- Improved fuel efficiency through optimized fuel delivery.
- Simplified installation with a comprehensive master kit.
- User-friendly touchscreen interface for monitoring and adjustments.
- Flexibility for both self-tuning and user-tunable settings.
- Reliable performance for up to 750 horsepower applications.
FEATURES:
- Fabricated 3mm thick aluminum sheet metal intake, TIG welded.
- Cast aluminum 102mm cable activated throttle body.
- Color touch screen handheld controller with windshield mount.
- LS ECU with 3-Bar MAP sensor, supporting boosted applications up to 30 psi.
- High volume billet fuel rails, and 55 lb/hr injectors.
- Sequential fuel and spark control with individual cylinder trim.
- Connectivity for 24x and 58x cam sensors and factory knock sensors.
- Two programmable electric fan outputs.
- Wideband oxygen sensor included.
- Custom wiring harness for direct plug-in installation.
- LS3 style coil packs with LED indications.
- Multiple fuel delivery options for various applications.





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