I just dyno'd my IX yesterday and noticed that my A/F below 5500rpm is at 10:1 read at the tailpipe. After 5500, it's at 11.5:1 (which I like). What would be the difference between that and A/F read at the rear O2? Also, how much of a power increase (if any) could I expect once I lean it out? I'll post up my logs I took and also the dyno graph as soon as I can so you guys can give me some pointers. Thanks.

Tony (still learning ECUFlash and Evoscan)

 

thats odd, usually its leaner down low and then super rich from like 5500.

 

I was talking about the stock tune... didn't even realize you had a TTMF, yeah thats really weird then.