I think you can even edit the firmware if you want to (but I don't see why you'd ever need to). Its packed full of features, all the basics like cold start enrichment, close loop fueling correction, etc, and plenty of awesome extras too such as high and low current, PWM, and 5v reference inputs and outputs that you can assign however you want. Its certainly proven itself as it's used in plenty of race cars and street cars. If you're not familiar with MegaSquirt, its an extraordinarily flexible engine management system that can be used on nearly any type of engine. Its a bit more affordable than the Holley systems (which are also good in my opinion). Extremely easy to use, and it has a self tuning feature for VE that worked incredibly well for me. Check the laws that apply in your locality to determine if using a MegaSquirt ® or MicroSquirt ® controller is legal for your application.I went with an MS3 Pro EVO from AMP EFI and used their drop-on harness kit too. MegaSquirt ® and MicroSquirt ® controllers are not for sale or use on pollution controlled vehicles. The board is sealed in a weather proof enclosure. And the serial RS-232 signals come out of the AMPSEAL connector (instead of a DB-9 on the front, as with MicroSquirt® ). The bootloader is externally accessible, so there’s no need to open the case, even to load new code. You can still upgrade to newer versions of the code as they are released, of course, but you won’t have to load the code initially to get MicroSquirt® working. Pre-loaded code: Unlike MegaSquirt® -II, MicroSquirt® comes with the embedded code already loaded onto its processor. MicroSquirt’s® board size, including the 35-pin AMPSEAL connector, is very small – 2.4″ x 3.5″ (61mm x 89mm), just slightly bigger than a credit card. Amazingly, the board is the physical size of a business card – connector and all. The MicroSquirt® board uses the 35-pin AMPSEAL connector and a sealed case to make a fully sealed unit. PWM Idle valves, as well as on/off idle valves, can still be used.ĭifferent connector and case. No stepper IAC control: In order to make room for the dual ignition inputs and dual outputs, the ability to to control a stepper IAC was removed. See the MicroSquirt® hardware page for more information on MAP sensors. An external MAP sensor, such as those from General Motors products, can be used instead. In order to shrink the ‘footprint’ of MicroSquirt®, the MAP sensor was left off the board. For example, for motorcycle use MicroSquirt® will be perfect! For up to 4 high-impedance injectors per bank. This is not a ‘peak and hold’ driver, but it does clamp the current at 5 amps, so it can be used with one low-impedance injector per bank, however the close time may be a tad higher (or you can use resistors). To get everything to fit without lots of heat sinking, MicroSquirt® uses the ST VND5N07 from STMicroelectronics to drive the injectors. The fuel injector drives will max out at 5 amps each, enough to drive one low-impedance (or 4 high-impedance) injector per bank. No pulse width modulation (PWM) to limit injector current. Dual Spark capability: The major new feature in MicroSquirt® v2.822 embedded code is the capability to use two inputs and two outputs for ignition.
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