Grippo MegaSquirt written by Philip Ringwood and James Murray (with contributions from many more). As the name implies it adds ignition management, as well as a large number of other features such as boost control, nitrous, fan control, programmable outputs, water injection and more to MegaSquirt. Hardware modifications are required to run ignition and the learning curve is steeper than a fuel-only implementation, but many hundreds of users use the "MS1/Extra" firmware. The firmware was very actively developed and is now a stable alternative to the base MS code. Most MegaSquirt vendors ship the MS1/Extra firmware as standard on MS1 boards. The firmware is designed to operate using either a supported ignition system, such as GM HEI, or Ford EDIS, or it can decode certain trigger wheel signals from crank/cam sensor pickups and directly run wasted spark or coil on plug. MS1/Custom Suzuki G13B MS1/Custom Suzuki G13B is a firmware modification to the MS1/Extra by Sebastian Giroldi, an engineer and Suzuki enthusiast better known by his nickname Caaarlo. The wheel decoder is tailored to read the very particular pattern of the camshaft encoder wheel found in the Suzuki G13B engine that powers the Suzuki Swift GTi, GT and Cultus GTi. It also generates the adequate PWM frequency for the factory Idle Solenoid, avoiding the need for generic toothed wheels and idle valves. Firmware for MS-II chip standard MS-II code This is the default Al Grippo code that you can load onto your MS-II board. The code has (multiple) 12x12 fuel and spark tables, stepper IAC control, PWM idle valve control, several user-configurable spare ports (for things like boost control, water injection, fan control, etc.), self-tuning functions (Automatic Mixture Control - AMC), and fuel control to 1 μs (100 times more resolution than MegaSquirt-I). MS-II can control distributors or EDIS ignitions and decode many standard toothed crank wheels. Additional features includes X-Tau transient enrichment compensation (acceleration enrichment), nitrous control with fuel and spark adjustments, enhanced closed-loop mixture control w/ wide band sensor AFR targeting, two types of rev-limiting, MAP/MAF/alpha-N fuel control, injector test mode, flex fuel (gasoline/E85) with appropriate sensor, and many more. See the Megamanual for download and documentation MS2/Extra code This is an extension of the base code, adding many of the much needed MS1/Extra features to the MS-II chip. Enhancements include wide support for OEM crank/cam wheels, wasted spark and COP ignition, closed loop idle, EAE, boost control,