AFC's are worthless in my opinion. I say try out a Hondata or Greddy E-manage system. Both are very effective with Hondas.

 

Yuo cant run a hondata on a bmw , I really wouldnt worry about the air fuel lats a little rich my car was tuned between 12 and 12.5 under boost .Unless you have a way to tune your fuel curve there isnt much you can do beside have the chip tunner burn another chip for it.If it drives fine dont worry about it . Better to be a little rich tahn to lean.

 

I am sorry, I thought were were talking about Hondas here. Shows you how much I was paying attention.

 

Yeah.. full throttle at 5k the engine is going to suck down gas I guess, still LOOKS really freaky from that graph, I should have grabbed someone elses' when I was there just to compare, an IS300 ran a baseline after me.. should have checked his AFR.