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Afc settings

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850cc are too BIG for AFC with stock ecu. What turbo are you running? For 16g's the 550 are large enough on gasline and can be controlled with AFC and stock ecu.
 
pretty sure 650s are the biggest you can tune with an safc. Why would you want such big injectors on a stock car though?
 
One thing I have learned turning my car is that you can't just plug in the settings that worked from someone else. Each car is different. Maybe your intake is different. You might have a 2g MAF etc... We have no where close to enough info and like I said each car is unique.
 
Don't confuse the max correction an SAFC can create with actually getting a good tune.

I seem to remember the 4 button SAFC only being able to do +- 30% corrections and the knob SAFC being able to do +- 50% but removing that much airflow signal causes the ECU to think there is a lot less load and use much more aggressive parts of the timing map than your likely to want.

I don't recomment any larger than 650cc injectors with any tuning solution that lies about the airflow to the ECU (like the SAFC, MAFT, or SAFC and MAF swap).

Besides trying to run E85 I can't think of any reason to run 850 injectors on a stock or small turbo car. Once you get up toy where you can use or need the bigger injectors your likely to want modified software in the ECU like a custom EPROM chip, DSMAP, or DSMLink.
 
Apexi afc settings for fic 850's on a stock 92 tsi
Dude, it's not that easy. Not even close. If any one of us could tune your car from hundreds of miles away we'd be worth millions.

Actually, you'll never tune 850's with an AFC regardless. The 850cc injectors are almost twice the size of the stock 450's, and I believe an AFC2 can only compensate to roughly +/- 50%.
 
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