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Curious, has anybody setup EL to run a Mazda rotary? I've been using mk e's model as a guide to better understanding the system and I'm trying to work out what will need to be modified to run a Mazda 12a/13b rotary.

What I'm thinking is:
2 rotors = 2 cylinders.
Configure as a 2 stroke - Each rotor fires one combustion face per e-shaft revolution. One firing pulse per rotor per rev, 180* apart. (1080* e-shaft rotation to fire all 3 combustion faces on both rotors.)
4 coils (2 leading, 2 trailing, one of each per rotor)
4 injectors (2 per rotor)
Engine displacement set to 1/3 of the actual swept volume. 0.367L in the case of a 1.1L. My thought here is that only 1/3 of the swept volume is relevant to airflow per engine cycle, and this would keep airflow calculations in line.


Conventional toothed wheel crank trigger. Likely a 36-1 hall, no cam trigger.
Configure timing type as "Cam with Crank missing 1 tooth" (Would I still forfeit the digital input that gets assigned as a cam trigger in the Engine Description even with no physical cam trigger?)
Set "EAL_TimingEvents" Bit0 to 1.

From the EL site documentation:
"["EAL_TimingEvents": This channel will allow the user to override various timing signal events.
Bit0: Internally generate a cam sync when none is present. This can be used for applications without a cam signal.]"


Rotor 1: spark & injector timing, 0 & 1 at 0*
Rotor 2: spark & injector timing, 2 & 3 at 180*


A table for trailing spark offset for coils 1 & 3 would need to be added. (Typically ~5 degrees behind the leading plug)

Injection end angle would need to be adjusted accordingly to jive with a 360* engine cycle.



Thoughts? Comments?

I have never messed with a rotary but how was it setup in the AEM software? the questions they ask can bre a good tell to what they were doing. Also their mode can read read it need be

The AEM wizard doesn't specify 2/4 stroke for rotary, it's just... rotary

Displacement is entered as swept volume as would a piston engine.

It does have a check box to ignore cam sync, which is what had me looking at the cam sync bit.

I'm not sure I follow what you mean when you say their mode can read it?

Typo. The AEM model can he read. You can open the file, open the engine item and see how it's setup...at least in theory.

You're saying in EL Console it can be read? I did try that, but get an error in Chinese. It also corrupts the .itssn and prevents it from being opened in Infinity Tuner.

Hot damn. I didn't try changing the extension before. That's the trick

Hmmmm....I've looked at them. AEM used v96 console not v97 but it shouldn't corrupt it......color me confused

Maybe that's what I did...I know I've opened it

Hmm, seems I may have jumped the gun. I can open a piston engine session that way, but the rotary session still throws an error. Looks like the error happens while it is downloading the Engine Description.

ok, google tells me a rotary fires once per crank revolution and has 2 plugs, about 5 degrees timing apart

So 2 stroke, no cam trigger should be correct. for a 2 rotor you need 4 spark outputs, so select 4 cylinder and then in the cylinder timing setup you can set the 2 plugs 5 degrees apart or set them the same and use a trim table to move them the 5 degrees. At least that is how it looks to me.