SAFC 2 question for s5 tII
 

ok i just got my safc 2 instlled this weekend and i set it up to the book. i started it up and it ran so i was happy. than i started to notice my eyes burning. the car was running so rich that it was smoking i went though and did the itnital set up again i had the sensor type set on flapper 6in and 6 out. i asked one of my buddies who messes with DSMs and he said to set the flapper to 1in and 1out. i did so and now it runs good. why would it not run corectly on it set on 6in and 6 out.. it this going to hurt my car or what. btw i have a 1989 tII with emissions removed cats cleaned out , cat back exaust, electric fan, 3" TID, and thats about it... any ideas?