under WOT about 5k im lean as a mo fo, like 16:1 any ideas? t61 t4 on 8-9 pounds

 

Yeah, increase injector duty cycle at 5000 rpm & 8-9 psi. I'm assuming you're running a standalone EMS, and if you continue to lean out like that, the engine will be toast.

 

I don't think you are that lean. You'd know if you were because you would be checking your mufflers for apex seals.

How are you reading this? What are your AF ratios throughout the pull? Is this lean condition sudden, or sustained? What management?