FT700 EFI System w/o Harness

The FT700 EFI System without Harness by FuelTech USA is a standalone engine management solution engineered for builders and enthusiasts who demand precision fuel and ignition control on street and competition vehicles. This modular ECU represents the cutting edge in aftermarket fuel injection technology, allowing you to integrate advanced electronic engine management into custom-built or heavily modified powerplants without the burden of a pre-assembled wiring harness. Whether you're tuning a carbureted-to-EFI conversion, upgrading a naturally aspirated engine, or managing a turbocharged or supercharged application, the FT700 delivers the real-time data logging and adjustability that separates a well-tuned engine from a guessing game.

The FT700 operates as a full-authority digital engine controller, managing fuel injection pulse width, ignition timing, idle speed, and boost control through a sophisticated algorithm that responds to dozens of sensor inputs in real time. Without the harness included in this SKU, you gain the flexibility to custom-fabricate your wiring loom to match your engine bay layout, firewall penetration, and sensor placement—essential for tight engine compartments or non-standard configurations. The unit weighs 9.34 pounds and measures 13.25 by 6.8 by 20.85 inches, making it compact enough to mount in a fuse box location or under a seat, while its ruggedized casing protects internal circuitry from vibration, heat cycling, and environmental contamination. Advanced features include multi-stage boost control, launch control, flat-shift capability, and a dual-channel wideband oxygen sensor interface for closed-loop feedback and diagnostic accuracy.

The FT700 EFI System without Harness is ideal for serious engine builders, fabrication shops, and seasoned DIY mechanics who possess the wiring knowledge and tuning software access required to commission the system independently. This configuration suits applications ranging from vintage hot rods and muscle car restorations to modern performance trucks and track-day machines where custom harness integration is either required or preferred. Compatibility spans small-block and big-block Chevrolet, Ford, Mopar, LS-family, and universal engine platforms, provided you source appropriate fuel injectors, sensors, and ignition coils rated for your displacement and intended RPM range. Professional installation and dyno tuning are strongly recommended to extract maximum reliability and performance; improper wiring or calibration can result in poor drivability or engine damage. Pair this ECU with a quality fuel pressure regulator, injector sizing calculator, and a reputable tuning service to unlock the full potential of your custom build.