Description

The FiTech Retro LS 650 HP Gold EFI w/ Inline Delivery & Regulator (31071) provides a complete electronic fuel injection solution for LS engines, combining modern performance with classic aesthetics. This master kit includes everything needed for installation, from the throttle body and ECU to the fuel delivery system and wiring harness. Designed for ease of use, it offers self-tuning capabilities and transmission control, making it ideal for both DIY enthusiasts and professionals.

KEY FEATURES AND BENEFITS:

• The FiTech 31071 Retro LS EFI system delivers significant performance and efficiency improvements for LS engines.
• Key features include a classic gold finish throttle body, support for up to 650 horsepower, and integrated transmission control for GM 4L60/65/80E transmissions.
• The self-tuning ECU eliminates the need for complex laptop tuning, and the included fuel delivery system ensures reliable fuel supply.
• This system improves fuel efficiency, enhances engine performance, and simplifies installation compared to traditional carburetor setups.

SPECIFICATIONS:

• Maximum Horsepower: 650 HP
• Injection Style: Throttle body
• Timing Control: Yes
• ECU Included: Yes
• Fuel Pump Included: Yes (255 LPH external)
• Transmission Controller: Yes
• Metering Style: Speed density (Map-N)
• Throttle Body Mounting Flange: 4-barrel square bore (4150)
• Venturi Diameter: 44 mm
• Airflow Rate: 950 CFM
• Injector Size: 80 lbs/hr
• Fuel Type: Alcohol, Gasoline, Methanol, Flex

HOW TO USE:

• Preparation: Disconnect the battery and remove the existing carburetor and fuel system components.
• Installation: Mount the FiTech throttle body onto the intake manifold using the provided gaskets.
• Fuel System: Install the inline fuel pump, filters, and regulator, connecting the fuel lines as per the instructions.
• Wiring: Connect the wiring harness to the engine sensors and transmission, following the provided diagrams.
• Sensor Connections: Attach the oxygen sensor, MAP sensor, IAT sensor, and TPS sensor to their respective locations.
• ECU Mounting: Mount the ECU in a suitable location, and connect the handheld tuner.
• Initial Setup: Power on the system and use the handheld tuner to input basic engine parameters.
• Self-Tuning: Start the engine and allow the ECU to self-tune the fuel and ignition settings.
• Transmission Setup: Use the handheld tuner to set transmission shift points and characteristics.
• Final Checks: Verify all connections and test drive the vehicle, making adjustments as needed.

BENEFITS OF USING THE FITECH RETRO LS 650 HP GOLD EFI W/ INLINE DELIVERY & REGULATOR (31071):

• Improved fuel efficiency and engine performance.
• Reliable starts and smoother idle.
• Elimination of vapor lock and fuel varnish issues.
• Simplified installation and self-tuning capabilities.
• Modern EFI technology with a classic aesthetic.
• Integrated transmission control for easier modern transmission swaps.

FEATURES:

• Classic gold finish throttle body.
• Integrated 80 lbs/hr fuel injectors.
• Annular discharge design for efficient fuel delivery.
• Compatible with 24x and 58x crank/cam sensors.
• Built-in knock sensor control.
• Touch screen LCD handheld tuner for easy adjustments.
• Complete fuel delivery system with inline pump and filters.
• Pre-terminated wiring harness for simplified installation.
• Adjustable fuel pressure regulator with gauge.
• Ability to use Alcohol, Gasoline, Methanol, and flex fuel.