Spark Gap X4 - Standalone Engine Management Kit
The Spark Gap X4 is a feature-filled 4-channel standalone ECU powered by the Atmega2560 and fully compatible with official Speeduino firmware. It supports up to 8 cylinders for fuel and ignition and is ideal for compact, cost-effective installations.
Included:
Assembled Spark Gap X4 ECU
Harness-side connectors and pins
Arduino Mega 2560 "Pro" pre-flashed with latest Speeduino firmware
The Spark Gap X4 is a feature-filled 4-channel standalone ECU powered by the Atmega2560 and fully compatible with official Speeduino firmware. It supports up to 8 cylinders for fuel and ignition and is ideal for compact, cost-effective installations.
Included:
Assembled Spark Gap X4 ECU
Harness-side connectors and pins
Arduino Mega 2560 "Pro" pre-flashed with latest Speeduino firmware
The Spark Gap X4 is a feature-filled 4-channel standalone ECU powered by the Atmega2560 and fully compatible with official Speeduino firmware. It supports up to 8 cylinders for fuel and ignition and is ideal for compact, cost-effective installations.
Included:
Assembled Spark Gap X4 ECU
Harness-side connectors and pins
Arduino Mega 2560 "Pro" pre-flashed with latest Speeduino firmware
Hardware Feature List:
Supports up to 8 cylinders fuel and ignition using 4 channels of fuel and 4 channels of ignition outputs, 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.
4 x Fuel Injector Outputs
4 x 5v Ignition outputs
4 x Pre-configured analog input channels (CLT, IAT, TPS, O2 sensors)
2 x Customizable spare analog inputs - e.g., oil pressure, fuel pressure
Up to 3 x Trigger inputs : Crank + dual camshaft position support
Up to 4 x Digital inputs - e.g., Flex Fuel, Vehicle Speed Sensor, Clutch switch
Dual VR conditioner mount (VR conditioner not included)
4-bar MAP sensor (up to 43 PSI boost)
Barometric pressure sensor (real-time atmospheric compensation)
DRV8825 mount for stepper idle valve control
8 x Digital Outputs (4 x 2A max | 4 x 400mA max) - e.g., Idle, Boost, VVT, Fuel Pump, Fan
Dedicated tachometer output
2 x Serial headers (Serial0 & Serial3), ideal for Bluetooth or WiFi modules
USB-C header (automatically disables Serial0 when USB is connected)
Open Source and Customizable:
Full control with open-source hardware and firmware.
Affordable and Reliable:
Serious performance without the high price tag.
Backed by a Big Community:
Lots of guides, support, and real-world experience available.
Tested Before Shipping:
Every ECU is tested to ensure top quality and reliability.