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How does the AFC handle the staged injection?

Old 05-10-07, 04:02 AM
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How does the AFC handle the staged injection?

i've been using S-afc 1,2,Neo for a long time now... but mostly on piston motors


i've been contemplating getting a cheap one to control some 800 or 1000CC secondaries on my S5... (BnR stage 3 FMIC etc etc)

but i was curious about how it works with rotors..


since the primaries are firing only at low load/rpm... and the larger secondaries are off.. I wont be doing any correction (except some fine tuning maybe)

and it's only when i pass 3,800 RPM that I have to start doing the heavy correction for the larger secondaries?


does the AFC handle this ok? or is there a big "hiccup" during the transition and sudden large correction for the secondaries?


what if u have a quick spooling turbo that spools before 3,800? will the secondaries kick on? or it will try to tax the primaries until the 3.8 mark?
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Old 05-15-07, 02:09 PM
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800's maybe.....1000's i wouldn't do it with an safc. You'll be maxxing out the % of trickery you can trick the ecu.

If you have a quick spooling turbo, the secondaries NEED to come on before 3800, but with the stock ecu, and an safc, they won't. Standalone will be your best option here.
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Old 05-23-07, 08:19 AM
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800's maybe.....1000's i wouldn't do it with an safc. You'll be maxxing out the % of trickery you can trick the ecu.
This will happen even with 720cc injectors. As long as your engine NEEDS that much fuel, and you are not just putting a larger overhead in there for adjustment, then you should be able to turn them down to a good point. If they are way to big and you need to turn them down more then 50%, you need to go with smaller injectors.

The SAFC does not know there is a staged injection system nor does it care. It works out great on a lot of rotary engines but as you know, the adjustment abuility is limited.

On a setup like yours, I would not use the SAFC. I don't like it even with my N/A. Look into the Rtek2.0 if its available for your ECU or Greddy Emanage which is a piggy back or stand alone. The Rtek 2.0 I believe lowers the staging point for the secondaries so they come on soon. I don't think this is something you can adjust though.

You will have adjustment over timing and fuel maps as well as a few other items the SAFC will not do.
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Old 05-24-07, 06:30 AM
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Rtek would of been nice

but it's only for the S4 boys... I have an JDM S5...

for the price of an E-manage Ultimate..

I could buy a plug n Play Power FC setup...


i was looking for a cheaper alternative...

Panspeed chipped Ecu for example..

Removes Speed Limit, Boost cut and fuel cut.. tweaked Timing and fuel

slap some bigger secondary injectors... and then use an AFC 2 for fine tuning..

total cost of ~$350

AFC or E-manage will be right around a grand all said and done
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