So im trying to find anyone who has info or a calibration file on a running 20b with aem series 1. Running a fd stock trigger wheel and m&w cdi boxes. 1 injector output for the 6th coil.
Any info helps. yes ive looked thru everything on all forums.
thanks guys

 

This will work is you have the correct amount of outputs. just move the phasing values over if you change any of the outputs. How are you running the coils?

Injector output 1 Rotor 1 Primary
Injector output 2 Rotor 2 Primary
Injector output 3 Rotor 3 Primary
injector output 4 Rotor 1 Secondary
Injector output 5 Rotor 2 Secondary
Injector output 6 Rotor 3 Secondary

Coil output 1 Leading 1 (bottom plug 1st housing)
Coil output 2 Leading 2 (bottom plug 2nd housing)
Coil output 3 Leading 3 (bottom plug 2nd housing)
Coil output 4 Trailing 1 (Top plug 1st housing)
Coil output 5 Trailing 2 (Top plug 2nd housing)
Coil output 6 Trailing 3 (Top plug 3rd housing)





EB Turbo

 

Thanks.
what ems is this on and is this on a stock fd 12 tooth trigger wheel? Looks like it.
WHos is this and did it run?

 

This is a Series II ECU. It has enough outputs to run ignition and injection sequentially. If you are running the wasted spark coils, you will just move the phasing value to the other wasted spark "B" value.

The FD and 20b trigger wheels have the same teeth count and will have the same advanced pickup settings.

This trigger setup did run this car. However your setup will be a bit different due to different outputs being used. Can you post how you are running your injectors and coils and which outputs you will be running them to?

EB Turbo

 

I didnt think the series 2 can do ignition difference (split)?
I was planning on running my series 1 aem ems with a coil rising edge trigger to 2 m&w cdi boxes. but i am open to easier ways like running ahonda series 2 aem and making it work.

"If you are running the wasted spark coils, you will just move the phasing value to the other wasted spark "B" value."

I dont quite follow.

 

The "Honda" Series II ECU has way more outputs than the 30-1800 RX7 ECU. The 30-1800 cant do a 20B in Sequential. The "Honda" box can. All AEM ECUs have the same software and control, including Staged injection and Timing split. The Series II would be better suited for a 20B application. The 30-1800 will work just fine if that's what already you have.

In wasted spark you have 2 different firing locations for the same output. This is where the "B" output is used. "B" fires the same output at a different location. Oh, Series I ECUs dont have "B" values. They use Location 6 and 7. Location 6 is the same thing as 1B. Forgot about that.

EB Turbo

 

you stated that the fd and 20b trigger wheels are the same so the values are the same?
The 13b fires every 6 teeth instead of every 4 like the 20b


And im not sure exactly how the aem has the spark setup for say a 13b. Isnt the trailing wasted spark only?
a 20b would be 3 different firing locations?

 

AEMs work on a 12 tooth count. All trigger wheels(36-1, 36-2, 60-1,...) are converted to 12 tooth counts via the tooth control table. The advanced pickups tab just defines how the AEM looks at the trigger wheel and interprets it. All FC, FD and 20B have the same tooth count. So, Advanced pickups will be the same. The ign and inj phasing values is what triggers the outputs. Those will change based on 2, 3 and 4 rotor engines. When cranking the engine once you get Stat Sync'd to turn on all you will need to worry about will be the phasing values.

EB Turbo

 

so after looking at wiring diagrams ive came to the conclusion that 3 coil outputs are being used and 1 (a 4th i guess you can call it) goes to the diagnostic plug.
Now 1 coil out signal from the ems controls both leading coils on a 13b and the other two go to their own coil for the trailings.
Now what i dont get is how the ems is setup for 4 coil outputs when it only utilizes 3 with the stock mazda wiring. How is it that the 1 wire controlling the leading plugs on a wasted spark system is firing the (leading ) coil twice a full crank revolution when in the setting for that output is set to fire once per crank revolution?

My thought is that i run the 20b's leadings as wasted spark ( lets remember mazda setup the fd as a wasted spark leading configuration from the factory and many are making 400-600hp including myself with this configuration to this day)
and i will use the 5th coil output ( as the fd box only has 5) as the 3rd trailing coil output.

ANyone with any thoughts on the matter.
I have to thank ebturbo for the help i have recieved thus far with the project.

 

In all reality im trying to figure out how 1 output is firing a 13b every 6 teeth on a series 1 and see if i can make it fire every 4 teeth wasted spark and i can make this happen really easy?

 

so its looking like the leading coil output controls any leading coils assigned as a leading coil.
SO i can run wasted spark leadings and use my 4th or 5th coil output as my 3rd trailing sequential coil.
Just not sure if the 4th coil and the 5th coil output sends the correct signal
pin 1c says 12v + cranking input - coil5 -output - dedicated
pin 1v says N/U - coil 4 - output - available switch gnd, 1.5amp max

so i guess i might have to call aem and see if these can do a output like coils 1,2,3 does

THe only thing ive found is this on coil 4 output
1V Coil 4 output (for non wasted spark application) or user defined output

 

Output 1 will be leading 1 and 2
Output 2 will be trailing 1
Output 3 will be trailing 2
Output 4 will be leading 3
Output 5 will be trailing 3

You can use two separate coils and wire them to the same output 1. This will give you 6 coils. The software has an option to fire each coil at a separate firing location. This is for wasted spark coils.

EB Turbo

 

I'm sorry it should be:

Output 1 will be leading 1
Output 2 will be trailing 1
Output 3 will be trailing 2
Output 4 will be leading 2
Output 5 will be leading 3
Output 6 will be trailing 3

The software has a option to fire one output at two different event. I think you can modify the 30-1800 to add a 6th output. I will confirm the detail and post them here.

EB Turbo

 

bump bringing to life
was this ever confirmed, looking at running AEM EMS 2 for my 20B

 

If you want to run an AEM on a 20b you will be better off with running a series II ecu. You will need to have jumpers moved in the ecu. You will want to deal with a good aem dealer who can modify the ecu, give you a good base map and can assist you with installation (wiring).

EB Turbo