Thread: Megasquirt?
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Old 03-14-2006, 02:01 PM   #11
Scooby Specialist
Member#: 1366
Join Date: Apr 2000
Chapter/Region: VIC
Location: Delta, BC, Canada
2000 RS-T -> RSTi-8
Blue Ridge Pearl


Run any EM in parallel with stock to keep OBD-II...

As for the MegaSquirt, I'm closing in as well, 4 wires short of testing my trigger-reading code (12+, Gnd, Cam, Crank) - I'm running on the MS-I platform with MSnS-E firmware though since I need wasted spark now and don't really want to use EDIS for ignition (MS-II only has 1 ignition out). There is work out there to read off the WRX trigger, but MS-II don't have the output to drive the stock COP directly. If you're not in a rush, MS-II could eventually fill your needs. If you know a bit of coding and feeling adventurous, maybe you can code up what you need. If you don't need ignition control right now, MS-II should be able to run your WRX. The main advantages I see with MS-II over MS-I is the precision for injector pulse width (16bit vs 8bit), and the expansion via CANbus. The other way I see an existing firmware (MSnS-E) that provides a lot of features that people want (up to 6 cyl COP, Boost Control / Water Inj, yada, yada). Sequential Injection is not available until the Router Board (expansion board running over CANbus) because there isn't enough timer channels on the main board, same goes for individual spark. At least the MS-II CPU is a daughter board plug into the mainboard which means you can start with MS-I and just buy the CPU upgrade (and rewire a few things)
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