DennyM: Ok, that makes sense, it's killing the A/C upon that threshold and then when the A/C resumes (it DOES resume, FYI), I just lose the recirculation function. I messed around with these settings in EFILive on my first tuning attempt and currently they are:
{G0101} A/C Disable RPM - 4000 RPM
{G0102} A/C Enable RPM - 3200 RPM
{G0103} A/C Disable TPS - 60%
{G0104} A/C Enable TPS - 0%
{G0105} A/C Enable Timer - 0
{G0106} A/C - Fan #2 Control
I suspect that changing 'Fan #2 Control' to 'Auto Recirculation' will take care of it, but I won't be uploading a new tune until I install the Killer Bee intake (hopefully today).
Thanks, guys.