Description
The FiTech Go EFI 550HP Classic Black External ECU w/ CDI Box (93021) provides modern electronic fuel injection benefits while maintaining the classic appearance of a 4-barrel carburetor. Designed for 550 horsepower applications, this throttle body system offers improved fuel efficiency and performance over traditional carburetors. The kit includes an external ECU, a Go-Spark CD ignition box, and essential sensors for a comprehensive upgrade.
KEY FEATURES AND BENEFITS:
- Self-Tuning Capabilities: Adapts to driving conditions for optimal performance.
- 4.5-Inch Full-Color Touchscreen: For easy setup and tuning adjustments.
- Dual Bolt Pattern Design: Fits both spread bore and 4150 square bore flanges for versatility.
- Bosch LSU 4.2 Wideband Oxygen Sensor: Ensures accurate fuel mapping.
- Airflow Rate: 950 CFM with 80 lbs/hr injectors, supporting engines up to 550 horsepower.
- External ECU Design: Retains the classic carburetor appearance.
- Go-Spark CD Ignition Box: Allows improved spark control.
SPECIFICATIONS:
- Maximum Horsepower: 550 HP
- Injection Style: Throttle body
- Airflow Rate: 950 CFM
- Injector Size: 80 lbs/hr
- Throttle Body Flange: 4-barrel square bore
- ECU Included: Yes
- Ignition Box Included: Yes
- Metering Style: Speed density (MAP-N) or speed throttle (Alpha-N)
- Display Screen Included: Yes
- Venturi Diameter: 44.00mm
HOW TO USE:
- Preparation: Remove the existing carburetor and ensure the intake manifold surface is clean.
- Installation: Mount the FiTech 93021 throttle body to the intake manifold using the appropriate gasket.
- Sensor Installation: Install the provided oxygen, MAP, IAT, and TPS sensors according to the instructions.
- Wiring: Connect the wiring harness to the sensors, ECU, and ignition box. Pay close attention to the provided wiring diagram.
- Fuel System: Connect the fuel lines to the throttle body, ensuring a proper fuel supply. (Note: a fuel pump is not included)
- ECU Setup: Use the touchscreen display to input engine parameters and start the self-tuning process.
- Initial Start: Start the engine and allow the system to warm up. Monitor the touchscreen for any error codes.
- Tuning: Drive the vehicle under various conditions to allow the self-tuning feature to optimize fuel delivery.
- Fine Tuning: User tuning is also capable through the 4.5-inch display.
BENEFITS OF USING FITECH GO EFI 550HP CLASSIC BLACK EXTERNAL ECU W/ CDI BOX (93021):
- Improved Fuel Efficiency: Compared to traditional carburetors.
- Enhanced Engine Performance: Better throttle response.
- Reduced Cold Start Issues: Minimizes engine hesitation.
- Simplified Tuning: Through self-tuning capabilities.
- Maintains Classic Appearance: Of a 4-barrel carburetor.
- Increased Reliability: Through electronic fuel injection.
FEATURES:
- Dual Bolt Pattern: For versatile installation.
- Bosch LSU 4.2 Wideband Oxygen Sensor: For accurate fuel management.
- 80 lbs/hr Fuel Injectors: For sufficient fuel delivery.
- Ability to Run Multiple Types of Fuels: Increases versatility.
- Black Painted Throttle Body: For a classic look.






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