Closed Deck X4 Professional Standalone Engine Management

Included:

• Assembled Closed Deck X4 ECU

• Locking ECU and harness-side connectors with terminals

• Arduino Mega 2560 "Pro" pre-flashed with Speeduino firmware

• Aluminum enclosure

Engine Compatibility:

• 1–4 cylinders: Supports full sequential fuel injection and ignition, as well as wasted-spark configurations, with compatible triggering.

• 5, 6, and 8 cylinders: Grouped fuel injection with supported wasted-spark or distributor ignition configurations.

• Rotary engines: Supports leading and trailing ignition configurations.

• 2-stroke engines: Supports compatible 2-stroke configurations.

For additional information on supported configurations and trigger requirements, see the Speeduino Wiki.

Hardware Feature List:

• 4 × Fuel Injector Outputs

• 4 × Ignition Signal Outputs (selectable 5V or 12V, 100mA max per channel)

• 4 × Preconfigured Analog Inputs (CLT, IAT, TPS, O2)

• 5 × Configurable Analog Inputs (e.g., oil pressure, fuel pressure)

• 3 × Buffered Trigger Inputs (crankshaft and dual camshaft position, compatible with 5V and 12V square-wave signals)

• 6 × Digital Inputs (e.g., flex fuel, vehicle speed, clutch switch)

• Mounting Provision for Dual-Channel VR Conditioner (not included)

• Onboard Footprint for MPXH-Series MAP Sensor (sensor options selectable above)

• Onboard Barometric Pressure Sensor (real-time atmospheric compensation)

• Mounting Provision for DRV8825 Stepper Driver (idle valve control, driver not included)

• 11 × Digital Outputs (1.2A max per channel) for idle, boost, VVT, fuel pump, fan, relay control, etc.

• Dedicated Tachometer Output

• 2 × Serial Headers (Serial0 and Serial3) for Bluetooth, Wi-Fi, or other serial devices

• USB-C Port header (bulkhead is rear-mounted, automatically disables Serial0 when USB is connected)

Closed Deck X4 pinout

Open-Source Hardware and Firmware: The Spark Gap X4 uses open-source hardware and is compatible with official Speeduino firmware. Hardware documentation and schematics are publicly available on GitHub.

Community and Resources: Speeduino has an active open-source community with documentation, forums, and other resources available for configuration and troubleshooting.

Tested Before Shipping: Each ECU is assembled and tested before shipping to verify proper hardware operation.