{"product_id":"3-with-ms3x-expansion-ecu","title":"3 with MS3X Expansion ECU","description":"The Classic MegaSquirt 3 ECU with MS3X Expansion from Megasquirt delivers a robust engine management solution for enthusiasts seeking advanced control and flexibility. It goes beyond the capabilities of previous MS1 and MS2 systems, incorporating features essential for performance applications such as sequential fuel and spark, boost control, 2-step launch, progressive nitrous, and onboard traction control.\n\nThis ECU is engineered with 8 sequential fuel injector outputs, each capable of driving high impedance injectors, and 8 logic-level ignition outputs that support LSx coils and IGN1A smart coils. Additionally, it provides 6 medium current outputs suitable for boost control, fan operation, or relay outputs, along with 3 analog sensor inputs for external MAP sensors, O2 sensors, and fuel pressure. Four switch inputs are available for table switching, nitrous arming, and launch control, complemented by a dedicated cam sync input compatible with various sensor types.\n\nThe MS3X offers high-resolution tuning with 16x16 VE and ignition tables, featuring full interpolation, a 0.1% fuel step resolution, and 0.1° ignition accuracy. Connectivity options include a built-in USB port, an SD card socket for onboard data logging (SD card not included), and CANBus support for expansion modules. It also supports closed-loop idle and AFR control, as well as GM stepper IAC idle control.\n\nNote that this system requires external ignition drivers or smart coils, and an SD card and wiring harness are sold separately. It is an ideal solution for budget-conscious racers seeking professional features, custom EFI conversions requiring full sequential control, and builders upgrading from older Megasquirt systems.","brand":"Megasquirt","offers":[{"title":"Default Title","offer_id":52689022157112,"sku":"MS3X357-C_BL","price":699.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687365770.webp?v=1784900554","url":"https:\/\/store.motormia.co\/products\/3-with-ms3x-expansion-ecu","provider":"MOTORMIA","version":"1.0","type":"link"}