Originally Posted by Savington
I sincerely doubt I'm misunderstanding, since you just repeated the same thing again.
I'd like you to provide specific examples of why the MS3X is more powerful than the EMS-4 for a 4-cylinder forced induction application (i.e. the relevant application for this thread and this forum in general).
I'm not crass enough to refuse to tune Megasquirts like some idiots across the country, but I do think that it lacks a couple of major features that the AEM supports. I've played with both and I think the EMS-4 is the superior ECU for our application.
I would like to turn the question back at you, if that's allowed. Why do you feel that the AEM EMS-4 is superior?
I downloaded AEMTuner and a Miata example project, looked through it and read through the manual a bit. I think this product is better directly compared to MS2 than MS3X.
Here is a list of the things I quickly found where MS3X has the advantage over EMS-4. I only listed things that I felt may benefit a Miata type application. Please feel free to look over the list and let me know if I made any errors regarding the capabilities of EMS-4.
-MS3X is natively compatible with 99-05 Miata crank trigger pattern and does not require installation of a new trigger disc (though MS3X is compatible with higher tooth count trigger wheels if desired).
-2 or 3 stage fueling with 2 stages sequential, vs only a single stage
-if only 4 fuel channels are being used, the remaining 6 can be reassigned as additional digital or PWM high current outputs
-programmable injector response curves, including trims for small pulsewidths for superior idle and light load characteristics with large injectors. each injector can have an individual response curve if needed.
-model based acceleration enrichment
-6x6 trim table per cylinder for fuel
-6x6 trim table per cylinder for ignition
-closed loop EGO per cylinder, if o2 sensors are installed per cylinder
-3 step launch (vs 2)
-much larger I/O, with separate inputs and outputs (where the AEM uses the same pins, so assigning an analog input removes a general purpose output)
-integrated a/c control with feed forward closed loop idle kick
-integrated cooling fan control with feed forward close loop idle kick
-native support of water/meth injection, multiple strategies
-native support of multiple stages of nitrous and progressive nitrous, multiple strategies
-native support of fuel pump control (instead of having to purpose a general purpose output for pump control)
-dual fuel support, with switchable maps for fuel, ignition, afr, ae, boost, rev limit
-E85/flex fuel sensor support
-trims for fuel pressure and fuel temperature
-AFR safety system, with programmable limiter if AFR is out of target
-sophisticated support for up to 2 knock sensors, integrated into software, with programmable level, bandpass frequency, and response
-logic ignition outputs can be inverted in software to natively support CDI ignition
-native support of basic traction control (driven wheel vs undriven wheel)
-"perfect run" feature to aid in consistent launch behavior
-MS3X has a lower price point
-MS3X can be built from a parts kit at an even lower price point
That is what I found at first glance, so my list may not be perfect. I apologize if I missed any features with the AEM system, and of course welcome feedback.