Description
The FiTech Black Dual Quad Retro Cast LS Port EFI (70085) offers a blend of classic aesthetics and modern electronic fuel injection technology. Designed for LS engines, this system provides a dual-quad look while delivering precise fuel management and improved performance. Rated for up to 750 horsepower, it’s suitable for high-performance applications.
KEY FEATURES AND BENEFITS:
- This EFI system features a cast aluminum intake manifold with two EFI throttle bodies, mimicking the appearance of traditional dual-quad carburetors.
- It is designed for LS1, LS2, LS6, LR4, LM4, LM7, LQ4, and LQ9 heads.
- The system includes 55lb injectors, dual O2 sensors, a 3-bar MAP sensor, wiring harness, and an external ECU.
- It is boost and nitrous capable.
- The system is user tunable with a 4.5-inch display, and features self-learning capabilities.
SPECIFICATIONS:
- Fuel Injection Style: Multi-port
- Fuel Injection System Type: Multi-port Throttle Body
- Maximum Horsepower: 750
- Timing Control: Yes
- ECM Included: Yes
- Self Tuning: Yes
- User Tunable: Yes
- Metering Style: Speed density
- Intake Material: Aluminum
- Throttle Body Mounting Flange: 4-barrel square bore
- Venturi Diameter: 45.00mm
- Airflow Rate: 1,800 cfm
- Injector Size: 55 lbs/hr
- Compatibility: LS1, LS2, LS6, LR4, LM4, LM7, LQ4, LQ9 heads, 4L60, 4L65, 4L80, 4L85 transmissions, 24X and 58X crank and cam signals.
HOW TO USE:
- Installation: Mount the intake manifold and throttle bodies onto the LS engine.
- Sensor Connection: Connect the included O2 sensors, MAP sensor, IAT sensor, TPS, and IAC motor to the wiring harness.
- Injector Installation: Install the 55lb injectors into the fuel rails.
- ECU Connection: Connect the external ECU to the wiring harness and power supply.
- Fuel System Setup: Connect the fuel lines to the fuel rails and ensure proper fuel pressure.
- Display Connection: Connect the 4.5-inch display to the ECU for monitoring and tuning.
- Initial Setup: Power on the system and follow the on-screen prompts for initial setup and self-learning.
- Tuning: Use the display or laptop software to fine-tune the system based on engine performance and desired settings.
BENEFITS OF USING THE FITECH BLACK DUAL QUAD RETRO CAST LS PORT EFI (70085):
- Achieve a classic dual-quad appearance with modern EFI performance.
- Improve fuel efficiency and engine responsiveness.
- Gain precise control over fuel delivery and timing.
- Simplify engine tuning with self-learning capabilities.
- Enhance engine performance with boost and nitrous compatibility.
- Provides a modern EFI system with a vintage aesthetic.
FEATURES:
- Center-pull throttle linkage design.
- Dual O2 sensor feedback for accurate fuel adjustments.
- Integrated MAP and IAT sensor for precise air/fuel calculations.
- User-friendly 4.5-inch display for monitoring and tuning.
- E85 fuel compatibility.
- Fan control and AC input capabilities.
- Pro-tuning laptop software.
- Transmission control compatibility.





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