The Spark Gap X4 is a compact standalone engine management kit designed around the open-source Speeduino platform. It includes an assembled ECU, enclosure, harness-side connectors and pins, and a pre-flashed ATmega2560-based controller.
The hardware and firmware support engines with up to 8 cylinders and provide a range of inputs, outputs, and expansion options in a compact, cost-effective package.
Detailed hardware features and specifications are listed below.
The legendary Speeduino 0.4 (0.4.4d)
Supports up to 8 cylinders for fuel and ignition using 4 channels for fuel and 4 channels for ignition outputs, suitable for 2 (even fire only), 3, and 4-cylinder engines with full sequential fuel and ignition. 6 (even fire only) and 8-cylinder engines are supported with wasted spark and 2 squirts per cycle.
Included:
Official Speeduino 0.4.4d
Optional Selection:
No MAP sensor
4-Bar Sensor (SMD Sensor via installed adapter)
2.5-Bar MAP Sensor (Currently out of stock)
Items you may need:
Fully compatible with the official Speeduino Firmware, no code modification required! This feature-filled 2-channel standalone ECU powered by official Speeduino Firmware supports up to 4 cylinders for fuel and ignition.
Included:
Pre-Ignition x2 Standalone ECU (Assembled minus main Connector)
ECU headers, harness side connectors, and pins.
Optional 4-Bar MAP sensor
Items you may need:
The OpenLogicEFI Engine Simulator, powered by the Ardustim firmware, is a powerful tool for simulating engine operation and testing various sensor and control systems. This simulator can simulate three simultaneous digital trigger patterns—crank, cam, and cam2—through free and open-source software, making it a versatile and flexible tool for hardware testing and diagnostics.
Assembled Unit:
Fully assembled and ready to use, as shown in the product images.
Unassembled Kit:
Includes a PCB with all surface-mount (SMD) components pre-installed. All remaining through-hole components are included but must be installed by the end user.
The Closed Deck X4 is our most feature-rich standalone engine management kit, offering expanded analog and digital inputs and outputs, a durable aluminum enclosure, and locking harness connectors.
Designed around the open-source Speeduino platform, the kit includes an assembled ECU, enclosure, harness-side connectors and pins, and a pre-flashed ATmega2560-based controller.
Detailed hardware features and specifications are listed below.