The S7D-4 ECU is a high-performance engine management system designed for modern direct injection engines requiring up to eight DI channels. Featuring a triple-processor architecture with dedicated FPGA-based engine position tracking, it delivers exceptional accuracy, control, and response under all operating conditions. With advanced DI, PI, torque-based control, CAN FD, motorsport strategies, and powerful data logging, the S7D-4 provides a future-proof solution for high-end road, motorsport, and OEM-style applications.

S7D Family Comparison Table

Overview

The S7D-4 ECU delivers an exceptionally high level of precise engine management control, designed specifically for modern Direct Injection (DI) engines used in high-performance road cars, motorsport, and advanced OEM-style applications.

The ECU features a triple-processor architecture, combining a high-speed RISC processor for core code execution with a large FPGA dedicated to ultra-high-speed engine position tracking. This allows code scheduling to operate independently of signal patterns, significantly improving accuracy, flexibility, and efficiency, particularly under transient conditions such as rapid load and RPM changes.

This powerful hardware platform enables highly advanced control strategies while remaining intuitive and easy to calibrate using SCal software and S7 firmware. The S7D-4 is also designed to support plug-and-play (PnP) kits, offering extensive programmable CAN Bus, CAN FD support, and the ability to meet unique OEM and aftermarket hardware requirements.

Core ECU Features

Engine & Vehicle Control

• Full engine control with live tuning of fuel, ignition, VVT, DBW, torque, and more via SCal
• Direct injection and port injection strategies (DI + PI)
• Torque-based control architecture
• Advanced knock control
• Advanced traction control
• Multiple sensor decoding support including SENT, PWM, and unique signal patterns
• Plus much more

Launch, Boost & Power Management

• Advanced launch control including multi-stage launch, rolling launch, and GPS speed-based control loops
• Anti-lag strategies to suit all forms of motorsport including WRC, LMP, T1, and OEM-style applications
• Closed-loop boost control for solenoids, electronic wastegates, and CO₂ systems
• Per-gear, speed-based, and time-based boost targets with trims
• Nitrous control with wet and dry strategies, including pressure and heater management
• Water and methanol injection support

Safety & Protection

• Lean condition monitoring
• Knock-based safety strategies
• EGT monitoring with shutdown strategies
• Fully configurable safety trips and limp modes

Data Logging & Analysis

• 64 MB onboard high-speed logging memory as standard
• Optional upgrade to 128 MB
• Logging rates up to 1000 Hz
• Simultaneous laptop logging
• Full analysis using SView, including log overlays and comparison tools

Motorsport & Expansion Support

• Paddle-shift and sequential gearbox control
• OBD-II support for live data and fault clearing
• GPSBT module support for GPS and IMU telemetry, lap timing, and track mapping via Bluetooth
• Expandable I/O using Syvecs X10 or X20 expansion modules

S7D-4 Full Specification

Outputs

• 4 direct injection injector outputs
• 2 direct injection pump outputs
• 4 ignition outputs (TTL or IGBT, selectable at time of order)
• 12 low-side port injector / PWM outputs
• 6 low-side PWM outputs
• 1 main relay control with power hold

Inputs

• 14 frequency inputs
• 4 ADC voltage inputs
• 4 thermistor inputs
• 2 knock inputs
• 2 wideband lambda inputs (NTK, Bosch LSU, or Denso AF, optional at time of order)
• 2 EGT thermocouple inputs

Communications

• 3 CAN buses with CAN FD support (standard on all S7D models)
• 1 LIN
• 1 RS232
• 1 Ethernet for PC communications and data transfer
• 1 USB PC communication interface for direct injection adjustment and custom CAN messaging

Hardware & Electrical

• Sealed aluminium billet enclosure
• 4 waterproof connectors
• 120-pin total I/O
• Input voltage range: 6–20 V with reverse-polarity protection
• Operating temperature range: −55 °C to +125 °C