Description
The FiTech Ultimate LS EFI 750HP w/70003 Kit + Force Fuel (75203) is a comprehensive solution designed to modernize and enhance the performance of LS engines. This system provides electronic fuel injection (EFI) for improved efficiency and responsiveness, featuring a 92mm throttle body, high-volume fuel rails, and a self-learning ECU. The integrated Force Fuel system ensures consistent fuel delivery, addressing potential fuel starvation issues with a reliable high-pressure setup.
KEY FEATURES AND BENEFITS:
- Performance Engineered: Supports up to 750 horsepower with sequential spark and fuel control.
- High-Volume Injectors: Includes 55 lbs./hr. injectors for precise fuel delivery.
- Simplified Installation: Plug-and-play wiring harness for easy setup.
- Touchscreen ECU: Color touchscreen for easy programming and monitoring of engine parameters, including target AFR and timing.
- Consistent Fuel Supply: The Force Fuel system uses your existing low-pressure pump to maintain a consistent 58 psi fuel supply under demanding conditions.
- Transmission Control: Optional control available for GM 4L60, 4L65, 4L70, and 4L80 transmissions.
SPECIFICATIONS:
- Maximum Horsepower: 750 HP
- Injection Style: Multi-port
- Throttle Body: 92mm, 102mm (venturi diameter)
- Injector Size: 55 lbs./hr.
- Fuel Pump Flow Rating: 340 lph
- Fuel Pressure: 58 psi (regulated)
- ECU: Self-learning, touchscreen interface
- Transmission Control: Optional (GM 4L60, 4L65, 4L70, 4L80)
- Compatibility: 24X and 58X crank/cam signals, gasoline, methanol, ethanol, flex fuel.
HOW TO USE:
- Installation: Mount the intake manifold, throttle body, and fuel rails onto the LS engine.
- Wiring: Connect the plug-and-play wiring harness to the engine sensors and ECU.
- Force Fuel Installation: Install the Force Fuel unit, connecting the existing low-pressure fuel line and high-pressure output.
- Sensor Connection: Install and connect the oxygen sensor, MAP sensor, IAT sensor, and TPS sensor.
- ECU Setup: Power on the ECU and follow the touchscreen prompts to input engine parameters.
- Initial Startup: Start the engine and allow the self-learning ECU to adjust fuel and timing settings.
- Tuning: Monitor engine performance and make on-the-fly adjustments as needed.
BENEFITS OF USING THE FITECH ULTIMATE LS EFI 750HP W/70003 KIT + FORCE FUEL (75203):
- Improved engine performance and efficiency.
- Enhanced throttle response and smoother idle.
- Reliable fuel delivery, preventing fuel starvation.
- Simplified installation with plug-and-play components.
- Easy programming and monitoring with the touchscreen ECU.
- Ability to fine-tune the engine for ideal performance.
- Modernized engine controls.
FEATURES:
- Black anodized aluminum construction for durability.
- Bosch wideband oxygen sensor for accurate readings.
- Stainless steel oxygen sensor bung for security.
- AN fittings for secure fuel connections.
- Compatibility with car and truck coils.
- Ability to work with custom camshafts.
- Compatible with both 24 and 58 tooth crank and cam sensor designs.
- Data logging function on handheld controller for performance tracking.
- Ability to adjust fan control from the handheld controller.






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