Description
The FiTech LS 500HP EFI Short Returnless Module Kit w/Coils & LED (79802) provides a comprehensive solution for upgrading or converting LS engines to electronic fuel injection. Designed for engines with cathedral port heads, this kit delivers up to 500 horsepower and simplifies installation with its self-tuning capabilities and included fuel and ignition components. It’s built to improve engine performance and drivability with precise fuel and spark control.
KEY FEATURES AND BENEFITS:
- Includes a short cathedral intake manifold constructed from fabricated 3mm thick aluminum.
- 92mm billet aluminum throttle body for improved airflow.
- 36 lb/hr injectors for precise fuel delivery.
- Self-learning ECU maintains target air/fuel ratios.
- Sequential fuel and spark control with individual cylinder trim for optimal performance.
- Compatible with 24x and 58x cam sensors, and knock sensors.
- Offers transmission control for 4L60/65/80/85 GM transmissions.
- Multiple fuel delivery options, including in-tank pump modules and an inline pump kit.
- Included LS3 style coil packs with optional LED indicators improve ignition system.
SPECIFICATIONS:
- Fuel Injection Style: Multi-port
- Maximum Horsepower: 500 hp (gas)
- Throttle Body: 92mm, GM LS2 4-bolt
- Injectors: 36 lbs/hr
- Intake Manifold: Fabricated aluminum, cathedral port
- ECU: Included, self-tuning
- Transmission Control: Yes, for 4L60/65/80/85
- Fuel System: Options for in-tank or inline pumps
- Ignition: LS3 style coil packs included
- Display: 4.5-inch color touchscreen
HOW TO USE:
- Prepare the Engine: Remove the existing intake manifold and carburetor (if applicable).
- Install the Intake Manifold: Mount the FiTech cathedral intake manifold onto the engine, ensuring proper gasket placement.
- Mount the Throttle Body: Attach the 92mm throttle body to the intake manifold.
- Install Fuel Components: Choose and install the appropriate fuel delivery system (in-tank or inline pump). Connect fuel lines and filters.
- Install Injectors and Fuel Rails: Secure the injectors into the intake manifold and attach the fuel rails.
- Connect Sensors: Install and connect the MAP, O2, IAT, TPS, and IAC sensors.
- Connect Ignition Coils: Mount and connect the LS3 style coil packs.
- Wire the ECU: Connect the wiring harness to the ECU and all sensors, injectors, and ignition coils.
- Connect the Display: Attach the handheld controller and mount it in a convenient location.
- Initial Setup: Follow the on-screen instructions on the handheld controller to configure the system and perform the initial setup.
- Start and Tune: Start the engine and allow the self-tuning feature to optimize fuel delivery. Fine-tune as needed using the handheld controller.
BENEFITS OF USING THE FITECH LS 500HP EFI SHORT RETURNLESS MODULE KIT W/COILS & LED (79802):
- Improved engine performance and throttle response.
- Simplified LS engine swaps with a complete EFI solution.
- Self-tuning capabilities for optimal fuel delivery.
- Enhanced fuel efficiency and emissions control.
- Transmission control for compatible GM transmissions.
- Flexibility with various fuel delivery options.
- Easy to use color touch screen display.
FEATURES:
- Fabricated 3mm thick aluminum sheet metal intake manifold.
- Cast, cable activated billet aluminum 92mm throttle body.
- Handheld controller with color touch screen and cable.
- Windshield mount for touch screen controller.
- 3-Bar MAP sensor for boosted applications up to 30 psi.
- Tach output driver works with most tachometers.
- Two programmable electric fan outputs.
- Supplied with WBO2 sensors.
- Custom wiring harness for a direct plug-in installation.
- Knock sensor control connects to factory sensors.






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